Proximal Thrombi Research Articles

Risk factors for postoperative DVT exacerbation or new DVT in patients with spinal cord injury complicated with cervical fracture.

To investigate the dynamic changes of perioperative deep venous thrombosis (DVT) in patients with spinal cord injury complicated with cervical fracture and analyze the risk factors of postoperative DVT exacerbation or new DVT. From January 2018 to December 2023, a total of 232 patients with spinal cord injury complicated with cervical fracture in our hospital were retrospectively analyzed. Ultrasonography of both lower limbs was performed before and after surgery. According to whether there was aggravation of DVT or new thrombosis, the group was divided into DVT exacerbation or new DVT group and non-DVT exacerbation group. Clinical data were used to study the dynamic changes of perioperative DVT. Logistic regression analysis and receiver operating characteristic (ROC) curve were used to explore the risk factors. The DVT was found in 47 patients before surgery, including 26 cases of distal thrombus, 14 cases of mixed thrombus and 7 cases of proximal thrombus. Postoperative DVT increased to 81, including 31 distal thrombus, 35 mixed thrombus and 15 proximal thrombus. A total of 53 patients (22.8%, 53/232) experienced postoperative DVT exacerbation or new DVT. Logistic regression analysis revealed that age, American Spinal Injury Association (ASIA) score, time from injury to surgery, surgery time and blood loss were risk factors for postoperative DVT exacerbation. In patients with spinal cord injury complicated with cervical fracture, the risk of postoperative DVT exacerbation is very high. Age, ASIA score A-B, time from injury to surgery, surgery time and blood loss were risk factors for postoperative DVT exacerbation or new DVT.

Combining the deployment of only the distal basket segment of the EMBOTRAP III and an aspiration catheter for M2 occlusions: the ONE-SEG technique.

Endovascular therapy (EVT) for distal medium vessel occlusions requires prioritizing effectiveness and safety. We developed a technique combining the deployment of only the distal basket segment of the EMBOTRAP III and an aspiration catheter (AC) for M2 occlusions, called the "ONE-SEG technique," and evaluated its clinical and technical impacts. This was a retrospective review of 30 consecutive patients with M2 segment middle cerebral artery occlusion treated using the ONE-SEG technique. This method involves deploying the EMBOTRAP III through a microcatheter in only one segment and guiding the AC to the M2 origin or distal M1. The rates of final-pass expanded thrombolysis in cerebral infarction (eTICI) scores of 2c/3 or 2b/2c/3, safety (symptomatic intracranial hemorrhage [sICH]), and clinical outcomes (modified Rankin Scale [mRS] score 0-2, 0-3 at 90 days, and mortality at 90 days) were evaluated. Of the 30 cases, 36.7% were female, and the mean age was 75.6 ± 11.0 years. The ONE-SEG technique was used for 17 cases (56.7%, median NIHSS 10 [5-15.5]) with primary M2 occlusion and 13 cases (43.3%, median NIHSS 20 [14-22.5]) with secondary M2 occlusion after proximal thrombus removal. The successful final reperfusion rate (eTICI 2b/2c/3) was 90% overall (27/30 cases). One case (3.3%) developed sICH with secondary M2 occlusion. At 3 months, mRS scores 0-2 were seen in 64.7% of patients with primary M2 occlusion (11/17 cases) and in 23.1% (3/13 cases) with secondary M2 occlusion. EVT using the ONE-SEG technique appears to be safe and effective for M2 occlusion.

Successful percutaneous coronary intervention in a congenital single right coronary artery with acute myocardial infarction: A case report and literature review.

Single coronary artery (SCA) is a rare coronary artery malformation. SCA combined with atherosclerotic plaques can cause severe and widespread myocardial ischemia and infarction, leading to hemodynamic instability and even sudden death. A 48-year-old Chinese man was admitted for treatment of persistent chest tightness and panic for 5 hours. The patient was a lorry driver with high work intensity and mental stress, with body mass index of 33.78, history of smoking and alcohol consumption, but no history of hypertension and diabetes. Admission examination showed Troponin was 183.083 µg/L and CK-MB value was >300 µg/L. The patient was diagnosed with a congenital single right coronary artery (RCA) with acute myocardial infarction (AMI) by coronary angiography (CAG). Due to atherosclerotic plaques rupture, a complete occlusion of the proximal RCA with thrombolysis in myocardial infarction grade 0 of distal blood flow were found. The patient was treated with thrombus aspiration and thrombolytic therapy by percutaneous coronary intervention under the support of intra-aortic balloon pump. Postoperative the chest tightness and panic were relieved, and CAG revealed that the proximal thrombus of the RCA was reduced, and distal blood flow was restored to thrombolysis in myocardial infarction grade 3. After 2 weeks of intensive antithrombotic and lipid-regulating drug therapy, the patient was successfully discharged. Follow-up for 6 months, the patient was able to live and work normally without experiencing chest tightness and chest pain. Computed tomography angiography (CTA) confirmed a congenital single RCA with patent lumen and no severe stenosis. The congenital single RCA is very rare, and it is fatal in conjunction with acute coronary syndrome. Early detection and appropriate treatment is critical for AMI patient with single RCA. CAG is the gold standard for diagnosis of single RCA, and CTA is a necessary to describe the anatomical course of abnormal coronary arteries.

Laboratory findings of postoperative venous thromboembolism (VTE) in Dr. Sardjito General Hospital, Yogyakarta

Venous thromboembolism (VTE) is a significant risk, especially for older individuals. Indonesian studies found 37.1% VTE incidence in bedridden patients over 40 and 2.1% in major surgeries. Surgery, like hip fractures, raises the risk temporarily. Diagnosis relies on tests like ultrasound with Doppler, Wells score, and neutrophil-to-lymphocyte ratio (NLR). This study aimed to evaluate the laboratory findings of postoperative VTE. A retrospective analysis was conducted in Dr. Sardjito General Hospital, Yogyakarta using medical record data of VTE patients who underwent major surgery. The laboratory data, including complete blood count characteristics for every month for three months after postsurgery and DVT presentation when it occurred on the diagnostic day were collected. In total of 27 patients involved in this study, VTE cases were more common in digestive (41.2%) and obstetric gynecology surgeries (29.4%) for females, and nervous (44.4%) and cardiovascular surgeries (22.2%) for males. Females had a higher prevalence of Well Score ≥3 (82.4% vs 40%; p=0.058) and longer VTE therapy durations (65.50 ± 46.51 vs 39.60 ± 41.04 d; p=0.172). Males had more unilateral VTE occurrences (90.9 vs 56.3%; p=0.070) and a higher proportion of total occlusion cases (60 vs 37.5%; p=0.422). NLR exhibited a significant decrease from the 1st to the 2nd month (10.52 vs 3.64; p=0.009), followed by an insignificant increase in the 3rd month (3.64 vs 3.98; p=0.878). Notably, NLR trended downward in the 2nd month examination. In conclusion, VTE occurs in 0.21% of postoperative patients, with the highest incidence observed in post-gynecological surgery patients. The NLR can serve as a diagnostic tool for VTE in extremities, as an elevated NLR indicates the presence of a more proximal thrombus.

Case report: three ways to mitigate the risk of embolization during left atrial appendage closure in a patient with a massive and proximal left atrial appendage thrombus

Abstract Background Left atrial appendage (LAA) thrombus is a contraindication for LAA closure (LAAC). However, in selected cases, oral anticoagulants are strictly contraindicated because of a history of life-threatening bleeding, and LAAC remains the only possible therapy to avoid systemic and especially cerebral embolization. Case summary We report a case of LAAC despite a massive proximal thrombus in a patient who had an absolute contraindication to anticoagulant therapy, with thorough pre-planning using CT scan, device modelling and thrombus trapping techniques to reduce the risk of systemic embolic events and perform LAAC safely. Discussion Although LAAC remains at high risk in this setting, the use of cautious techniques and tools, from pre-procedure planning to systemic embolization prevention systems associated to a precise transoesopheageal echocardiography guiding throughout the procedure, allows it to be performed as safely as possible when no other option is available.

Association between pre-treatment computed tomography findings and post-treatment persistent decrease in lung perfusion blood volume

The purpose of this study was to evaluate pre-treatment CT findings in patients with acute pulmonary embolism (PE) and determine the imaging findings associated with residual hypoperfused segments in post-treatment lung perfused blood volume (LPBV). We evaluated 91 patients with acute PE who underwent dual-energy CT before and after treatment. The location of thrombi (proximal or distal) and patency of the pulmonary artery (occlusive or non-occlusive) were recorded using pre-treatment computed tomography pulmonary angiography (CTPA). Residual hypoperfusion was defined as a perfusion-decreased area seen in both the pre- and post-treatment LPBVs. The association of the location of the thrombus and vascular patency of pre-treatment CTPA with residual hypoperfusion on a segmental and patient basis was examined. In the segment-based analysis, the proportion of residual hypoperfusion in the proximal group was significantly higher than that in the peripheral group (33/125 [26.4%] vs. 9/87 [10.3%], P = 0.004). Patient-based analysis also showed that the proportion of residual hypoperfusion in patients with pre-treatment proximal thrombus was significantly higher than those without (16/42 [38.1%] vs. 3/25 (12.0%); P = 0.022). Pre-treatment vascular patency was not significantly associated with residual hypoperfusion (P > 0.05). Therefore, careful follow-up is necessary, especially in patients with proximal thrombi.

Shear wave elastography values of thrombus in patients with lower extremity deep vein thrombosis for pulmonary embolism detection: the ROC analysis

Rationale: Thrombosis of the iliac (IV) and femoral veins (FV) is one of the most common causes of pulmonary embolism (PE). Modern ultrasound scanners are equipped with the technology of shear wave elastography, which gives a quantitative assessment of thrombus stiffness by Young's modulus reconstruction. However, the lack of convincing data on the role of thrombus stiffness for clinical manifestations of PE hinders the active use of shear wave elastography to diagnose the risk of embolism.
 Aim: To determine the threshold values of the venous thrombus Young’s modulus for deep venous thrombosis (DVT) of the lower extremities complicated by massive PE and/or PE with acute cor pulmonale (ACP).
 Materials and methods: This was a single center cross-sectional study in 101 patients who were hospitalized with the diagnosis of acute (duration of less than 2 weeks) or subacute (from 2 weeks to 3 months) IV and FV thrombosis. Doppler ultrasound of the lower extremity veins and echocardiography were done in all patients. Forty eight patients with clinical signs of PE had chest computed tomography. The venous thrombus stiffness was assessed by shear wave elastography with the Young's modulus reconstruction. We performed the ROC analysis for mean values of the Young's modulus for proximal segments of IV and FV thrombi in patients with DVT and massive PE and ACP.
 Results: PE was diagnosed in 40.6% (26/64) of the patients hospitalized with acute DVT and in 54.1% (20/37) of those with subacute DVT. Echocardiographic signs of ACP in massive PE were found in 47.4% (9/19) of the patients, in submassive and minor PE in 55.6% (15/27). In DVT complicated with PE, the ROC analysis of the shear wave elastography results gave the following threshold values of the mean Young’s modulus for the proximal thrombus segment: for acute IV thrombosis + PE and ACP, ≤ 16.7 kPa (AUC 0.714, sensitivity 100%, specificity 42.1%), in subacute IV thrombosis + PE and APC, ≤ 23.7 kPa (0.939, 100 and 90.9%, respectively), in acute FV thrombosis + massive PE, ≥ 9.5 kPa (0.706, 100 and 50%, respectively), in subacute FV thrombosis + massive PE, ≥ 24.4 kPa (0.550, 60.0 and 68.8%, respectively).
 Conclusion: Shear wave elastography of deep vein thrombi of the lower extremities makes it possible to identify patients with PE and ACP during acute and subacute IV thrombosis and to determine massive PE in acute FV thrombosis.

Safety and efficacy of endovenous ablation in patients with a history of deep vein thrombosis

ObjectiveEndovenous ablation is the standard of care for patients with symptomatic superficial venous insufficiency. For patients with a history of deep vein thrombosis (DVT), concern exists for an increased risk of postprocedural complications, particularly venous thromboembolism. The objective of this study was to evaluate the safety and efficacy of endovenous thermal ablation in patients with a history of DVT. MethodsThe national Vascular Quality Initiative Varicose Vein Registry was queried for superficial venous procedures performed from January 2014 to July 2021. Limbs treated with radiofrequency or laser ablation were compared between patients with and without a DVT history. The primary safety end point was incident DVT or endothermal heat-induced thrombosis (EHIT) II-IV in the treated limb at <3 months of follow-up. The secondary safety end points included any proximal thrombus extension (ie, EHIT I-IV), major bleeding, hematoma, pulmonary embolism, and death due to the procedure. The primary efficacy end point was technical failure (ie, recanalization at <1 week of follow-up). Secondary efficacy end points included the risk of recanalization over time and the postprocedural change in quality-of-life measures. Outcomes stratified by preoperative use of anticoagulation (AC) were also compared among those with prior DVT. ResultsAmong 33,892 endovenous thermal ablations performed on 23,572 individual patients aged 13 to 90 years, 1698 patients (7.2%) had a history of DVT. Patients with prior DVT were older (P < .001), had a higher body mass index (P < .001), were more likely to be male at birth (P < .001) and Black/African American (P < .001), and had greater CEAP classifications (P < .001). A history of DVT conferred a higher risk of new DVT (1.4% vs 0.8%; P = .03), proximal thrombus extension (2.3% vs 1.6%; P = .045), and bleeding (0.2% vs 0.04%; P = .03). EHIT II-IV, pulmonary embolism, and hematoma risk did not differ by DVT history (P = NS). No deaths from treatment occurred in either group. Continuing preoperative AC in patients with prior DVT did not change the risk of any complications after endovenous ablation (P = NS) but did confer an increased hematoma risk among all endovenous thermal ablations and surgeries (P = .001). Technical failure was similar between groups (2.0% vs 1.2%; P = .07), although a history of DVT conferred an increased recanalization risk over time (hazard ratio, 1.90; 95% confidence interval, 1.46, 2.46; P < .001). The groups had comparable improvements in postprocedural venous clinical severity scores and Heaviness, Aching, Swelling, Throbbing, and Itching scores (P = NS). ConclusionsEndovenous thermal ablation for patients with a history of DVT was effective. However, appropriate patient counseling regarding a heightened DVT risk, albeit still low, is critical. The decision to continue or withhold AC preoperatively should be tailored on a case-by-case basis.

Distribution characteristics of perioperative deep vein thrombosis (DVT) and risk factors of postoperative DVT exacerbation in patients with thoracolumbar fractures caused by high-energy injuries.

To investigate the distribution characteristics of perioperative deep venous thrombosis (DVT) in patients with thoracolumbar fractures caused by high-energy injuries and analyze the risk factors of postoperative DVT exacerbation. From October 2016 to July 2021, a total of 550 patients with thoracolumbar fractures due to high-energy injuries in our hospital were retrospectively analyzed. Both lower limbs were examined by ultrasound before and after operation. Depending on whether the postoperative DVT was exacerbating, the group was divided into a DVT exacerbation group and a non-DVT exacerbation group. Clinical data were used to study the characteristics of perioperative DVT. Logistic regression analysis and receiver operating characteristic (ROC) curve were used to explore the risk factors of postoperative DVT exacerbation. DVT was found in 97 patients before operation, including 78 cases of distal thrombus, 6 cases of proximal thrombus, and 13 cases of mixed thrombus. Postoperative DVT increased to 116, including 87 distal thrombus, 10 proximal thrombus, and 19 mixed thrombus. The intermuscular vein was the most easily involved vein. Compared with lumbar fractures, thoracic fractures were more likely to have postoperative proximal thrombus (P=0.014). There were 48 cases of thrombus exacerbation after operation. Logistic regression analysis revealed that age, lower extremity muscle strength, time from injury to operation, and blood loss were risk factors for postoperative DVT exacerbation. The intermuscular vein is the most easily involved vein. The anatomical distribution of DVT at different fracture sites is different, and patients with thoracic fractures are more likely to have proximal DVT after operation. Age, lower extremity muscle strength, time from injury to operation, and blood loss were risk factors for postoperative DVT exacerbation.

Endovenous laser ablation and drug treatment of acute great saphenous vein ascending thrombophlebitis: comparison of three approaches to the treatment of patients

Aim. In patients with acute thrombophlebitis of the great saphenous vein and/or large tributaries, compare the effectiveness and safety of 1,5-month fondaparinux sodium therapy and endovenous laser ablation in the area of the saphenofemoral junction in combination with shortterm anticoagulation or without anticoagulant therapy.Material and methods. This prospective, single-center, randomized, open-label clinical trial included 105 patients with acute great saphenous vein thrombophlebitis at a distance of at least 5 cm from the saphenofemoral junction. Thirty-four patients were randomized into the group of endovenous laser ablation in the area of the saphenofemoral junction without the anticoagulant therapy. The group of endovenous laser ablation in combination with 7-day fondaparinux sodium included 35 patients, while the group of 1,5-month treatment with fondaparinux sodium — 36. In all cases, class 2 compression stockings were used for 1,5 months. Clinical manifestations of venous thrombosis and its prevalence according to compression ultrasonography were assessed in the first 45±2 days from the start of treatment.Results. The mean age of patients was 49,1±13,7 years. There were more women (73,3%). The prevalence of risk factors for the occurrence and progression of venous thrombosis was low. Previous episodes of thrombophlebitis were observed in 3 (2,9%) patients. External factors that could provoke venous thrombosis were identified in 21 (20,0%) patients. Thrombosis was located in the great saphenous vein in 97,1% of patients, while large tributaries were involved in 25,7% of cases. The median distance from the proximal thrombus to the saphenofemoral junction was 45,2 cm. Patients randomized to the pharmacotherapy group were significantly older (mean age 49,1±13,7, 45,9±13,3 and 53,8±13,2 years, respectively; p=0,032), had slightly less pain and swelling. In all patients, after endovascular laser obliteration, a stable flow cessation at the intervention site was achieved. There were no cases of progression of venous thrombosis. After 7±2 days, in all groups there was a significant decrease in the proportion of patients with clinical manifestations of venous thrombosis, as well as the severity of persistent clinical manifestations. After 45±2 days, clinical manifestations were observed in a few patients and their severity was minimal. However, in the drug treatment group, a more frequent persistence of edema was noted both after 7±2 days (26,5, 20,0 and 47,7%, respectively; p=0,036) and after 45±2 days, (0, 2,9 and 16,7%, respectively; p=0,01). Hematomas and bruises were exclusive hemorrhagic complications. Hematomas were revealed in groups with endovenous laser ablation only. All hemorrhagic complication were minor according to World Society of Thrombosis and Hemostasis (ISTH) and type 1 according to Academic Research Consortium (BARC) classifications.Conclusion. In outpatients with low risk of recurrence and mainly distal localization of acute thrombophlebitis of the great saphenous vein and/ or large inflows, endovenous laser ablation close to saphenous vein junction without anticoagulation or with 7 days of anticoagulation and medical treatment with 1,5-month anticoagulation had comparable efficacy and invasive treatment was sufficiently safe.

Abstract 12579: Intracoronary Thrombolysis, an Option in Coronary Arteries With Unique Characteristics: A Case Series Report

Cases Description: Case 1: A 47-year-old male with inferior ST-segment Elevation Myocardial Infarction (STEMI). Percutaneous Coronary Intervention (PCI), showed an ectasic Right Coronary Artery (RCA) with an occlusive thrombus in mid-distal segment, TIMI 0. Thromboaspiration was not successful, proceeding to use intracoronary (IC) Alteplase 15mg. 72 hours later, PCI showed a RCA without stenosis, TIMI 2. Intravascular Ultrasound (IVUS) was used, showing no plaques or dissection. Discharged with Rivaroxaban 20mg QD and Acetilsalicylic acid (ASA) 100mg QD. Case 2: A 38-year-old male, with previous PCI and 1 stent in Anterior Descending Artery (ADA); arrives with STEMI. PCI showed a ADA non-occlusive intrastent thrombus, TIMI 2. IC Alteplase 15mg was used. After 72 hours, PCI identified the ADA with TIMI 3 flow. IVUS and Optical Coherence Tomography (OCT) showed a mild intrastent thrombus and proximal infraexpansion of previous stent. Proximal and medial segments were dilated, and 1 stent was placed distal. IVUS showed adequate expansion. Discharged with Apixaban 5mg BID and Clopidogrel 75mg QD. Case 3: A 64-year-old male, with inferior STEMI. PCI shows an ectasic ADA with a proximal and medial segment thrombus, TIMI 2. Tromboaspiration and posterior IC Alteplase 15mg were used, with TIMI 3 result. PCI 24 hours later, shows the ADA with TIMI 3 flow. IVUS identifies that no angioplasty was needed. Discharged with Ticagrelor 90mg BID and ASA QD. Discussion: IC thrombolysis is a useful method in primary PCI, where there is no favorable anatomy or massive IC thrombus. These cases show the utility of using IC imaging to evaluate the anatomy and thrombotic content of angiographic lesions. There is no consensus in the chronic anticoagulation/antithrombotic management after IC thrombolysis.

Abstract 115: Carotid Intraluminal Thrombus Obscuring Underlying Carotid Web: Case Report

Introduction Carotid webs (CaW) have been increasingly recognized as a unique cause of recurrent ischemic strokes.1 They are defined as thin, intraluminal, shelf‐like lesions along the posterior aspect of the carotid bulb.1,2 Despite more awareness and ongoing studies into their pathogenesis, diagnosis, and management,3 they are still overlooked in clinical practice as a primary carotid ischemic etiology. Our case describes a patient with right extracranial internal carotid artery (ICA) thrombus secondary to later‐diagnosed CaW on close follow‐up imaging. Methods We report a 55‐year‐old African American man with history of hypertension, type 2 diabetes mellitus and hyperlipidemia presented with acute onset slurred speech and left facial droop (FP). His last known well was 24 hours prior to presentation, and NIHSS upon arrival was 3 (FP 2, dysarthria 1). CT angiography (CTA) of the head and neck demonstrated a nearly occlusive thrombus of the distal right M2 segment MCA as well as non‐hemodynamic stenosis of the proximal right ICA with possible underlying sidewall filling defect‐appearing lesion concerning for a posterior wall thrombus without underlying atherosclerosis at the bulb or otherwise. The patient was admitted to the neurovascular intensive care unit and started on aspirin and high‐risk heparin drip. His MRI Brain demonstrated multiple acute/subacute right MCA territory strokes, predominately in the right posterior insula, right frontal lobe, and right posterior corona radiata. His stroke workup was otherwise unrevealing, and he was discharged on apixaban 5mg BID. Results Close surveillance follow‐up imaging with CTA head and neck was planned and obtained one month later, which demonstrated resolution of the filling defect that was obscuring the currently visualized underlying right CaW pocket (Figure‐1). The prevalence of CaWs has been reported to be between 1.2% and 2.5% of patients with acute ischemic stroke. CaWs are most frequently seen in younger, female patients, and patients with these lesions are at increased risk of recurrent stroke.4,5 Determining the optimal management for these lesions remains essential, but the available data thus far have not been conclusive. Most patients are treated with antiplatelet therapy, but some elect to treat with anticoagulation due to the focal hemostasis caused by CaWs.6 However, multiple studies have suggested that medical management alone is likely not sufficient in reducing the recurrent stroke risk caused by CaWs.5,7 Neuro‐interventional procedures including carotid artery stenting have been reported as secondary prevention strategies in patients with recurrent strokes.5,7,8 Although data regarding the rate of recurrence of strokes secondary to these lesions remains unclear, the current data does suggest benefit and safety in pursuing carotid stenting to prevent recurrent strokes.5‐8 Conclusion In young patients with proximal ICA thrombosis without underlying atherosclerosis or other conventional stroke risk factors, CaW should be considered among other differentials including hypercoagulable status. Following acute medical management, short‐term surveillance imaging is essential to confirm or rule out the diagnosis. In our case, the patient’s proximal ICA thrombus resolved after short course of anticoagulation and was determined to be secondary to the obscured underlying CaW.

Systemic inflammatory response index (SIRI) and Systemic immune-inflammation index (SII) to show Thrombus Localization in Patients with Acute Pulmonary Embolism

Pulmonary embolism (PE) is a critical disease associated with mortality. Considerable markers related to this disease associated with inflammation have been used to catch thrombus localization. In this study, we wanted to examine the association between the Systemic inflammatory response index (SIRI), Systemic immune-inflammation index (SII) and thrombus localization in patients with PE. Our study consisted of patients diagnosed with PE between January 2020- June 2022. Laboratory parameters of patients diagnosed with PE, especially thrombus localization, thrombus location, SII, and SIRI, were recorded and compared with thrombus localization. One hundred patient with PE who met the inclusion criteria was incorporated in our study. When we grouped the patients according to PE localization, the thrombus was in the main pulmonary vein in 18%, in the lobar region in 51%, and in the distal pulmonary vein in 31% of the patients. In addition, mean SIRI and SII levels were encountered to be higher in patients with main pulmonary localization compared to those with thrombus in both lobar and segmental branches. SIRI has 78% sensitivity, and 72% specificity at the optimum cut-off value; in Level II, it detects thrombus with main pulmonary involvement with 66.7% sensitivity and 79.3% specificity. In patients with PE, high SII and SIRI values can be practical markers in predicting proximal thrombus.

Risk of acute stroke in young patients with new-onset lupus nephritis: a case series (P9-5.028)

<h3>Objective:</h3> To investigate the relationship between new-onset lupus nephritis and acute stroke. <h3>Background:</h3> Systemic lupus erythematosus (SLE) is a multi-organ autoimmune disease associated with an increased risk for stroke. <h3>Design/Methods:</h3> We reviewed medical records of patients evaluated by the inpatient Stanford Stroke Service from 2020–2022 with confirmed stroke on neuroimaging and diagnosis of SLE based on American College of Rheumatology Classification Criteria. Data regarding the clinical course, laboratory testing, and neuroimaging were extracted from electronic medical records. <h3>Results:</h3> Three patients were identified (two male, one female) with ages ranging from 17–32 years. Two patents had prior diagnosis of SLE without renal involvement. Magnetic resonance imaging obtained for all three patients demonstrated ischemic strokes restricted to a vascular territory. Magnetic resonance angiography demonstrated a proximal left superior cerebellar artery thrombus for one patient and slight enhancement in the proximal left M1-segment for another patient. Initial preliminary labs for all three patients were notable for leukopenia, anemia, hematuria, proteinuria, elevated urine protein/creatine ratio. Serologic testing was notable for positive ANA, positive anti-dsDNA, positive anti-Sm, low C3, and low C4. Anti-phospholipid labs and hypercoagulable work-up was negative. CSF analysis yielded normal protein, glucose, WBC, and RBC. All three patients were diagnosed with new-onset lupus nephritis, with two patients undergoing confirmatory renal biopsy. Patients were initially treated with a combination of prednisone, mycophenolate mofetil, and/or hydroxychloroquine and closely followed as an outpatient. One patient with vessel enhancement on initial imaging continued to have reoccurring strokes and required escalation of immunotherapy to cyclophosphamide with eventual remission and normalization of antibody levels. <h3>Conclusions:</h3> This case series presents several young patients with acute stroke in the setting of new-onset lupus nephritis without other traditional SLE-related stroke risk factors. Further research is needed to guide the stratification of stroke risk among patients with SLE. <b>Disclosure:</b> Dr. Wu has nothing to disclose. Dr. Han has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Roche. Dr. Han has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Arena Pharmaceuticals. Dr. Lee has nothing to disclose.

Comparison of outcomes following polidocanol microfoam and radiofrequency ablation of incompetent thigh great and accessory saphenous veins

BackgroundMicrofoam ablation (MFA) and radiofrequency ablation (RFA) are both approved by the Food and Drug Administration for treatment of proximal saphenous truncal veins. The objective of our study was to compare early postoperative outcomes between MFA and RFA following treatment of incompetent thigh saphenous veins. MethodsA retrospective review of a prospectively maintained database was conducted of patients who underwent treatment of incompetent great saphenous veins (GSVs) or anterior accessory saphenous veins (AASVs) in the thigh. All the patients underwent duplex ultrasound of the treated leg at 48 to 72 hours postoperatively. Patients were excluded from analysis if concomitant stab phlebectomy was performed. Demographic data, CEAP (clinical, etiologic, anatomic, pathophysiologic) class, venous clinical severity score (VCSS), and adverse events were recorded. ResultsBetween June 2018 and September 2022, 784 consecutive limbs (RFA, n = 560; MFA, n = 224) underwent venous closure for symptomatic reflux. A total of 200 consecutive thigh GSVs and ASVs treated within the study period using either MFA (n = 100) or RFA (n = 100) were identified. The patients were predominantly women (69%) with a mean age of 64 years. The preoperative CEAP classification was similar between the MFA and RFA groups. The mean preoperative VCSS was 9.4 ± 2.6 for the RFA patients and 9.9 ± 3.3 for the MFA patients. Among the RFA patients, the GSV was treated in 98% and the AASV in 2% compared with the GSV in 83% and the AASV in 17% in the MFA group (P < .001). The mean operative time was 42.4 ± 15.4 minutes in the RFA group and 33.8 ±16.9 minutes in the MFA group (P < .001). The median follow-up was 64 days for the study cohort. The mean postoperative VCSS declined to 7.3 ± 2.1 in the RFA group and 7.8 ± 2.9 in the MFA group. Complete closure occurred in 100% of the limbs after RFA and 90% after MFA (P = .005). Eight veins were partially closed and two remained patent following MFA. The incidence of superficial phlebitis was 6% and 15% (P = .06) after RFA and MFA, respectively. Overall, symptomatic relief was 90% following RFA and 89.5% following MFA. The complete ulcer healing rate for the entire cohort was 77.8%. Deep venous proximal thrombus extension (RFA, 1%; vs MFA, 4%; P = .37) and remote deep vein thrombosis (RFA, 0%; vs MFA, 2%; P = .5) showed a trend toward being higher following MFA but the difference did not reach statistical significance. All were asymptomatic and resolved with short-term anticoagulation therapy. ConclusionsMFA and RFA are both safe and effective for treating incompetent thigh saphenous veins, with excellent symptomatic relief and a low incidence of postprocedure adverse thrombotic events. RFA resulted in improved complete closure rates following initial treatment compared with MFA. The operative times were shorter with MFA. Both modalities can be used for patients with active venous ulcers with good healing rates. Longer term studies are required to characterize the durability of MFA closure for above knee truncal veins.

Early results following comparison of radiofrequency and microfoam ablation of large diameter truncal veins demonstrate high closure rates and symptomatic relief

ObjectiveEndovenous closure of truncal veins with a large diameter (LD) (≥8 mm) has been associated with higher risk of post ablation thrombus propagation into the deep venous system. Similar findings after Varithena microfoam ablation (MFA) have not been characterized. The study objective was to analyze outcomes after both radiofrequency ablation (RFA) and MFA and of LD truncal veins. MethodsA retrospective review of a prospectively maintained database was performed. All patients who underwent MFA and RFA for LD symptomatic truncal vein reflux (≥8 mm) were identified. All patients had postoperative duplex (48-72 hours) scanning. Patients underwent subsequent clinical follow-up at 3 to 6 weeks. Demographic data, CEAP Classification, Venous Clinical Severity Score, procedure details, adverse thrombotic events, and follow-up data were abstracted. ResultsBetween June 2018 and September 2022, 784 consecutive limbs (RFA, n = 560; MFA, n = 224) underwent truncal vein (great, accessory, and small saphenous) closure for symptomatic reflux. Sixty-six limbs in the MFA group met inclusion criteria. Sixty-six consecutive limbs treated with RFA during the same time period were included as a comparison group. The mean truncal vein diameter treated was 10.5 mm (RFA, 10.0 mm; MFA, 10.9 mm). Twenty-nine limbs (44%) in the RFA group underwent concomitant phlebectomy. Tributary veins were concomitantly sclerosed in 34 MFA limbs (52%). Total procedural times were shorter in the MFA group (MFA, 31.6 minutes vs RFA, 55.7 minutes) (P < .001). Immediate closure rates were 100% and 95% in the RFA and MFA groups, respectively. Venous Clinical Severity Scores improved after treatment in both groups (RFA, from 9.5 to 7.8; P ≤ .001) (MFA, from 11.3 to 9.0; P ≤ .001). In the RFA and MFA groups, 83% and 79% of venous ulcers healed during the study period, respectively. Symptomatic superficial phlebitis occurred after RFA in 11% and 17% MFA. The incidence of postablation proximal deep venous thrombus extension was 3.0% in the RFA group and 6.1% in the MFA group, which was not statistically significant. All resolved with short-term oral anticoagulant therapy. No remote deep venous thromboses or pulmonary emboli occurred in either group. ConclusionsHigh early closure rates, symptom relief and ulcer healing rates can be achieved after RFA and MFA of LD saphenous veins. Both techniques can be used safely across a wide array of CEAP classes. Longer term studies are required to characterize the durability of MFA closure and sustained symptom relief in LD truncal veins.

Dynamic Changes and Relevant Factors of Perioperative Deep Vein Thrombosis in Patients with Thoracolumbar Fractures Caused by High-Energy Injuries.

To investigate the dynamic changes and relevant factors of deep vein thrombosis (DVT) in patients with thoracolumbar fractures caused by high-energy injuries. From January 2016 to June 2021, a total of 655 patients with thoracolumbar fractures who underwent surgical treatment in our hospital were retrospectively analyzed. The patients were examined by preoperative and postoperative ultrasonography, and divided into thrombus growth group, thrombus invariant group, and thrombus regression group according to the preoperative and postoperative ultrasonographic results. Medical record data, including demographic data, surgical data, and laboratory results, were collected and the differences in various factors among the groups were compared. DVT was found in 99 patients (15.1%, 99/655) before surgery, including 79 cases of distal thrombus, 7 cases of proximal thrombus, and 13 cases of mixed thrombus. The incidence of postoperative DVT increased to 20.6% (134/655), including 96 cases of distal thrombus, 15 cases of proximal thrombus, and 23 cases of mixed thrombus. Among them, 39.7% had thrombus growth, 49.3% had thrombus basically unchanged and 11.0% had thrombolysis. There were significant differences in age, lower extremity muscle strength, time from trauma to surgery, operation time, blood loss, blood transfusion, and post 3-D-dimer among the three groups. In patients with thoracolumbar fractures caused by high-energy injuries, the majority of patients with DVT do not change or grow after surgery, and only a few of them have thrombolysis. Younger age, lower extremity motor, and fewer blood transfusion contribute to thrombolysis. Delayed surgical intervention, longer operation time, and higher blood loss can lead to thrombosis growth. Post 3-D-dimer is closely related to the dynamic changes of thrombus.

Association Between Inferior Vena Cava-Involved Thrombosis, Severe Iliac Vein Stenosis, and Proximal Pulmonary Embolism in Patients With Deep Vein Thrombosis.

To investigate the possible risk factors for proximal pulmonary embolism (PE) in patients with lower extremity deep vein thrombosis (LEDVT). A single-center, retrospective cohort study was conducted. Consecutive patients diagnosed with unilateral LEDVT and confirmed PE by computed tomography (CT) pulmonary angiography and indirect CT venography between September 2015 and January 2022 were included. Patient demographics, presentation of LEDVT, laboratory examination, thrombus characteristics, comorbidities and risk factors for LEDVT, and imaging findings were analyzed to determine the univariable and multivariable associations. The associations between thrombus location, stenosis, and proximal PE were assessed using a stratified analysis. A total of 115 eligible patients (60.08 ± 15.18 years, 59.1% male) were included. Of these patients, 40 (34.8%) were in the proximal PE group (proximal thrombus involved main or lobar pulmonary artery), and 75 (65.2%) were in the distal PE group (without main and labor pulmonary artery involvement). The univariable analysis showed that onset time of LEDVT symptoms ≤ 7 days (P = .041), inferior vena cava (IVC) involvement (P = .035), and severe iliac vein stenosis (IVS) (stenosis ratio > 61.3%) (P = .010) were associated with the occurrence of proximal PE. Further multivariant analysis showed that IVC involvement was associated with an increased odds of proximal PE (OR: 4.45, 95% CI: 1.083 - 18.248, P = .038), whereas severe IVS (stenosis ratio > 61.3%) was associated with a decreased odds of proximal PE (OR: 0.294, 95% CI: 0.110-0.783, P = .014). Among patients with unilateral LEDVT, IVC involvement increased the risk of proximal PE; patients with severe IVS (stenosis ratio > 61.3%) had a lower risk of developing proximal PE compared with distal PE; and severe IVS seemed to be a protective factor for proximal PE.

Right Ventricle Remodeling in Chronic Thromboembolic Pulmonary Hypertension.

Chronic thromboembolic pulmonary hypertension (CTEPH) is an underdiagnosed, but potentially curable pulmonary vascular disease. The increased pulmonary vascular resistance in CTEPH is caused by unresolved proximal thrombus and secondary microvasculopathy in the pulmonary vasculature, leading to adaptive and maladaptive remodeling of the right ventricle (RV), eventual right heart failure, and death. Knowledge on the RV remodeling process in CTEPH is limited. The progression to RV failure in CTEPH is a markedly slower process. A detailed understanding of the pathophysiology and underlying mechanisms of RV remodeling may facilitate early diagnosis and the development of targeted therapy. While ultrasound, magnetic resonance imaging, right heart catheterization, and serum biomarkers have been used to assess cardiac function, the current treatment strategies reduce the afterload of the right heart, but are less effective in improving the maladaptive remodeling of the right heart. This review systematically summarizes the current knowledge on adaptive and maladaptive remodeling of the right heart in CTEPH from molecular mechanisms to clinical practice.

High-Resolution Vessel Wall MR Imaging in Diagnosis and Length Measurement of Cerebral Arterial Thrombosis: A Feasibility Study.

Detecting and measuring intraluminal thrombus has prognostic and therapeutic implications for stroke patients. To investigate the feasibility of 3D isotropic high-resolution T1w-CUBE imaging to detect and measure intraluminal thrombus in stroke patients. Retrospective. A total of 93 patients with acute (N=39) and subacute (N= 54) stroke. A 3.0 T/spin-echo echo-planar diffusion-weighted imaging (DWI), high-resolution T1w-CUBE imaging and 3D flow compensated gradient-echo susceptibility-weighted imaging (SWI). Data assessment was performed by three neuroradiologists with 11, 13, and 20 years of clinical experience. The accuracy of T1W-CUBE and SWI in diagnosing thrombosis was compared by using digital subtraction angiography (DSA) as the reference. For thrombus length measurement, the image quality of proximal and distal thrombus of T1w-CUBE images was first evaluated with a 4-point rating system. Then, the proximal and distal positions to lesions were determined on T1w-CUBE images and compared with those from DSA acquired during endovascular reperfusion therapy. If comparable both locations were found between CUBE and DSA, CUBE imaging can thus be considered for accurate measurement of thrombus length. Fleiss' Kappa; the area under the receiver operating characteristic (ROC) curve (AUC); Pearson's chi-squared test with Yates' continuity correction. Moderate-to-good interobserver agreements were validated with all Kappa coefficients higher than 0.40 in thrombus diagnosis and measurement. CUBE imaging showed higher clinical efficacy than SWI (AUC: 0.966 vs. 0.850) in thrombus diagnosis. Additionally, high quality of CUBE imaging was confirmed with 3 or 4 points rated by all three observers. Compared to intraoperative DSA, T1w CUBE showed consistent proximal and distal positions of thrombi in 16 of the 18 patients, validating the accuracy of T1w-CUBE in measuring thrombus length. T1w-CUBE imaging has potential to facilitate diagnosis and measurement of intraluminal thrombus. 4 TECHNICAL EFFICACY: Stage 2.