Embolization Techniques Research Articles

Endovascular embolization of visceral artery aneurysm: a retrospective study

To assess the safety and efficacy of endovascular embolization techniques, we compared the short- to medium-term prognosis of coil embolization for symptomatic visceral aneurysms (SVAA) and asymptomatic visceral aneurysms (ASVAA) to identify risk factors associated with 30-day mortality. Explore the symptom profile and intrinsic associations of SVAA. A retrospective study of 66 consecutive patients at two tertiary care hospitals from 2010 to 2020 compared the short- to mid-term outcomes of 22 symptomatic VAAs and 44 asymptomatic VAAs treated with coil embolization. Univariate and log-rank tests were used to analyze the prognostic impact of SVAA and ASVAA. SVAA group had significantly higher 30-day mortality than ASVAA group (2(9.1%) vs 0, P = 0.042), both patients who died had symptomatic pseudoaneurysms. Perioperative complications such as end-organ ischemia (P = 0.293) and reintervention (P = 1) were similar in both groups. No difference in event-free survival was identified between the two groups (P = 0.900), but we found that the majority of pseudoaneurysms were SVAA (4/5) and that they had a much higher event rate than true aneurysms. In addition, dyslipidemia may be an influential factor in the development of VAA (P = 0.010). Coil embolization is a safe and effective method of treatment for VAA. Most pseudoaneurysms have symptoms such as abdominal pain and bleeding, and in view of their risk, more attention should be paid to symptomatic patients and the nature of the aneurysm should be determined as soon as possible to determine the next stage of treatment.

Spinal Dorsal Intradural Arteriovenous Fistulas: Natural History, Imaging, and Management.

In this review, we describe the pathophysiology, diagnosis, and treatment of spinal dorsal intradural arteriovenous fistulas (DI-AVFs), focusing on novel research areas. DI-AVFs compose the most common subgroup of spinal arteriovenous lesions and most commonly involve the thoracic spine, followed by lumbar and sacral segments. The pathogenesis underlying DI-AVFs is an area of emerging understanding, thought to be attributable to venous congestion and hypertension that precipitate ascending myelopathy. Patients with DI-AVFs typically present with motor, sensory, or urinary dysfunction, although a wide swath of other less common symptoms has been reported. DI-AVFs can be subdivided by spinal region, which in turn is associated with 4 distinct clinical phenotypes: craniocervical junction (CCJ), subaxial cervical, thoracic, and lumbosacral. Patients with CCJ and lumbosacral DI-AVFs have particularly interesting presentations and treatment considerations. High-value diagnostic findings on MRI include flow voids, missing-piece sign, and T2-weighted intramedullary hyperintensity. However, digital subtraction angiography is the gold standard for diagnosis and localization of DI-AVFs and for definitive treatment planning. Surgical disconnection of DI-AVFs is almost universally curative and frontline treatment, especially for CCJ and lumbosacral DI-AVFs. Endovascular techniques evolve in promising ways, such as improved visualization, distal access, and liquid embolic techniques. The pathophysiology of DI-AVFs is better understood using newly identified radiologic diagnostic markers. Despite new techniques and devices introduced in the endovascular field, surgery remains the gold-standard treatment for DI-AVFs.

Empirical transarterial embolization in angiographically negative lower gastrointestinal bleeding using vessel tracking and 3D navigation tools: report of 2 patients

BackgroundRecently, an empiric Cone-beam Computed Tomography (CBCT)-guided transarterial embolization (TAE) technique has been investigated for lower gastrointestinal bleeding (LGIB). Although this empirical strategy reduced the rate of rebleeding in hemodynamically unstable patients compared to a ‘wait and see’ strategy, the specified technique is challenging and time-consuming.Case presentationWe present two methods to perform a prompt empiric TAE in LGIB when catheter angiography is negative. Based on the pre-procedural Computed Tomography Angiography bleeding site and using vessel detection and navigation software tools that are integrated in contemporary angiosuites, the culprit bleeding artery could be targeted with only one selective intraprocedural CBCT acquisition.ConclusionThe proposed techniques are promising to reduce procedure time and facilitate the implementation of empiric CBCT-guided TAE in clinical practice when angiography is negative.

Application of the pressure cooker technique for transarterial embolization of brain arteriovenous malformations: Factors affecting obliteration and outcomes.

The typical pressure cooker technique (PCT) and several modifications with similar mechanisms have been introduced to enhance the embolization of brain arteriovenous malformations (bAVMs). This study aimed to assess the effectiveness of transarterial embolization of bAVMs with the PCT. From January 2019 to December 2021, 125 consecutive patients with bAVM managed by transarterial embolization in the prospective database on cerebral vascular diseases of a single center were retrospectively reviewed. Patient data and lesion characteristics were collected. According to the treatment strategy, the patients were assigned to the PCT group (46 patients) and conventional embolization technique (CET) group (79 patients). Baseline patient features were comparable between the two groups. After the first procedure, complete obliteration immediately was observed in 61 and 42% of patients in the PCT and CET groups, respectively. The rate was markedly elevated in the PCT group (p = 0.04). In subgroup analysis, the rate of immediate complete obliteration was starkly increased in PCT group patients with Spetzler-Martin grade I/II bAVM (86 and 53% in the PCT and CET groups, respectively; p = 0.0036). The overall complication rates were similar in the two groups (13 and 10% in the PCT and CET groups, respectively; p = 0.77). In multivariable analysis, nidus size >3 cm (OR = 8.826, 95% CI: 1.250-62.312; p = 0.03) and deep location (OR = 8.576, 95% CI: 1.480-49.690; p = 0.02) were significant factors affecting complete obliteration in the PCT group. The PCT may yield a higher rate of immediate complete obliteration with transarterial embolization of bAVMs, without increasing the rate of procedure-related complications.

Back to the Future II-A Comprehensive Update on the Rapidly Evolving Field of Lymphatic Imaging and Interventions.

Lymphatic imaging and interventional therapies of disorders affecting the lymphatic vascular system have evolved rapidly in recent years. Although x-ray lymphangiography had been all but replaced by the advent of cross-sectional imaging and the scientific focus shifted to lymph node imaging (eg, for detection of metastatic disease), interest in lymph vessel imaging was rekindled by the introduction of lymphatic interventional treatments in the late 1990s. Although x-ray lymphangiography is still the mainstay imaging technique to guide interventional procedures, several other, often less invasive, techniques have been developed more recently to evaluate the lymphatic vascular system and associated pathologies. Especially the introduction of magnetic resonance, and even more recently computed tomography, lymphangiography with water-soluble iodinated contrast agent has furthered our understanding of complex pathophysiological backgrounds of lymphatic diseases. This has led to an improvement of treatment approaches, especially of nontraumatic disorders caused by lymphatic flow abnormalities including plastic bronchitis, protein-losing enteropathy, and nontraumatic chylolymphatic leakages. The therapeutic armamentarium has also constantly grown and diversified in recent years with the introduction of more complex catheter-based and interstitial embolization techniques, lymph vessel stenting, lymphovenous anastomoses, as well as (targeted) medical treatment options. The aim of this article is to review the relevant spectrum of lymphatic disorders with currently available radiological imaging and interventional techniques, as well as the application of these methods in specific, individual clinical situations.

The Effect of Preoperative Oil Chemoembolization Techniques on the Results 
 of Combined Treatment of Operable Pancreatic Cancer

Background: Pancreatogastroduodenal resection is widely used for the treatment of pancreatic cancer but the 5-year survival rate does not exceed 10%. The treatment should be combined, but the question of the expediency of neoadjuvant therapy (NAT) with initially operable cancer has not been resolved.
 Aims: Substantiation of the expediency of the use of preoperative intra-arterial interventions in the combined treatment of patients with operable pancreatic cancer and the study of the impact of the technical features of the intervention on the treatment results.
 Materials and methods: The study included 92 patients (45 men and 47 women; mean age 63.910.1 years, T2N0M0 n=13; T3N0M0 n=32; T2N1M0 n=1; T4N0and1M0 n=46) who received combined treatment for the period 2014-2017.In I group, n=45 patients, the NAT was not performed.In II group, n=47 patients underwent intra-arterial oil chemoembolization of the pancreas with an emulsion of oil contrast and gemcitabine concentrate 400 mg/m2.The technique of distributive embolization of the artery gastroepiploica (GEA) differed: in IIA group, n= 22 patients with a spiral; in IIB group, n=25 patients with a temporarily inflated balloon.All 92 patients underwent radical surgery and received adjuvant chemotherapy based on gemcitabine 1000 mg/m2 in 1,8.15 days, 6 cycles. The frequency of specific and general postoperative complications was analyzed. For control, ultrasound, CT with contrast, CA 19-9 antigen level, general and biochemical blood tests were used. For 5 years, the results of each patient were tracked. The primary endpoints were overall (OS) and relapse-free (RFS) survival.
 Results: Postembolization syndrome did not affect the timing of the operation. The edematous form of acute pancreatitis was noted in 11 (50%) patients of group IIA and in 5 (20%) patients of group IIB, (p=0.043). Destructive pancreatitis was not marked. The overall 1-year survival rate (OS) in I group (n=31) was 68.9%, in II group (n=40) 85.1%, (p=0.062). The 2-years OS was: in I group (n=19) 42.2%, in II group (n=30) 63.8%, (p=0.042). The 3-year OS was: in I group (n=9) 20%, in II group (n=19) 40.4%, (p=0.021). The 4-years OS was: in I group (n=4) 8.9%, in II group (n=7) 14.8%, (p=0.387). The 5-year OS was: in I group 0, in II group (n=2) 4.3%, (p=0.168). The 1-year RFS was: in I group (n=23) 57.1%, in II group (n=29) 61.7%, (p=0.316). The 2-years RFS was: in I group (n=10) 22.2%, in II group (n=23) 48.9%, (p=0.012). The 3-years RFS was: in I group (n=7) 15.6%, in II group (n=16) 34%, (p=0.047). The 4-years RFS was: in I group (n=3) 6.7%, in II group (n=5) 10.6%, (p=0.568). The 5-years RFS was: in I group 0, in II group (n=1) 4%, (p=0.333).
 Conclusions: The results of the study confirm the feasibility of using preoperative intra-arterial interventions in the combined treatment of pancreatic cancer. There was a significant difference in the rates of 2-year and 3-year OS and RFS in patients receiving such therapy. The technique of occlusion of the artery gastroepiploica with a balloon probably provides more preferable results.

310 "The "Bright Falx" Sign - Midline Embolic Penetration is Associated With Faster Resolution of CSDH Following MMA Embolization

INTRODUCTION: CSDHs are common in the elderly and patients taking antiplatelet/anticoagulation medications. MMA embolization has become an adjunctive treatment to observation and surgery. Despite many embolization techniques, best practices for optimal CSDH resolution remain unknown. METHODS: Retrospective chart review was done on all patients who underwent MMA embolization for CSDHs between January 2017 and June 2021. Patient demographics, clinical presentation, anticoagulant use, and radiographic features were collected. Pre- and post-embolization CT scans were analyzed for volumetric changes and assessed for midline penetration of embolic material in the falx. RESULTS: MMA embolization was performed in 37 patients and 53 hemispheres. Older patients took longer to obtain complete resolution of CSDHs (r = 0.47, p = 0.03). Patients with larger pre-embolization (r = 0.57, p = 0.007) and post-embolization (r = 0.56, p = 0.008) CSDH volumes took longer to completely resolve. Patients who had nBCA embolization with midline penetration, as evidenced by the "bright falx" sign, had faster improvement rates than those who did not (5.64 cm3/d vs. 1.2 cm3/d, p = 0.02). CONCLUSIONS: Distal penetration of embolic material, particularly nBCA, into the falx may lead to more rapid improvement of CSDH.

807 Outcomes of Endovascular Embolization for Vein of Galen Malformations: An Individual Participant Data Meta-Analysis

INTRODUCTION: Understanding outcomes of Vein of Galen malformation (VOGM) embolization have been limited by small sample size and heterogeneity of reported series. METHODS: We performed a systematic review and individual patient data meta-analysis of VOGM endovascular outcomes according to PRISMA guidelines. Individual patient data (IPD) including demographic, intra/post-operative complications, treatment efficacy (partial or complete occlusion), and neurological outcome were collected. Mixed-effects logistic regression with random effects modeling and Bonferroni correction was used (p<0.003 threshold for statistical significance). The primary and secondary outcomes were all-cause mortality and poor clinical outcome (moderate/severe developmental delay or permanent disabling injury), respectively. RESULTS: Thirty-five studies totaling 307 patients evaluating outcomes of endovascular embolization for VOGM were included. Mean follow up was 42 (±57) months. Our analysis contained 42% neonates (<1 month) at first embolization, 45% infants (1 month < 2 years), and 13% children (>2 years). Complete occlusion was obtained in 48% of patients. Overall all-cause mortality was 16%. Overall, good clinical outcome was achieved in 68% of patients. First embolization as a neonate (OR = 6.93 [1.99-24.08] p<0.001) and incomplete occlusion (OR = 10.87 [1.86-63.55], p < 0.001) were associated with mortality. First embolization as a neonate (OR = 3.24 [1.47-7.15], p < 0.001), incomplete occlusion (OR = 5.26 [2.06-13.43], p < 0.001), and heart failure at presentation (OR = 3.10 [1.03-9.33], p = 0.002) were associated with poor clinical outcomes. Sex, angioarchitecture of lesion, embolization technique, and single or multistage embolization were not associated with mortality or clinical outcome. CONCLUSIONS: For the first time, we identify incomplete embolization treatment associated with poor clinical outcome and mortality. While this study provides the highest level of evidence for VOGM embolization to date, prospective multicenter studies are needed to understand the optimal treatment strategies, outcomes, and natural history after VOGM embolization.

Intraosseous resection of mandibular arteriovenous malformations: A mandible sparing multi-disciplinary case series

Mandibular arteriovenous malformations (AVMs) are high flow vascular malformations that can cause pain, hypertrophy, deformity, malocclusion, jaw asymmetry, bone destruction, tooth loss, and severe bleeding [1]. Although general principles apply, the rarity of mandibular AVMs limits definitive agreement on the best course of treatment. Current treatment options include embolization, sclerotherapy, surgical resection, or some combination of techniques [2]. [3]. An alternative multidisciplinary technique of embolization with mandibular-sparing resection is presented. This technique aims to mitigate bleeding with effective removal of the AVM, while preserving mandibular form, function, dentition, and occlusion.

Rapid ventricular overdrive pacing and other advanced flow-control techniques for the endovascular embolization of vein of galen malformations.

Endovascular embolization is the primary strategy in the management for vein of Galen malformations (VOGM). However, despite significant advances in endovascular embolization technologies and techniques, VOGMs remain very technically challenging lesions largely due to the high-flow arteriovenous shunts present in these malformations. A variety of advanced flow-control techniques can be implemented to mitigate the risk of venous escape and increase the safety and efficacy of endovascular treatment. These techniques include regionally targeted strategies (transvenous embolization and balloon-assisted transarterial embolization) and global flow-control methods (pharmacologic cardiac arrest and rapid ventricular overdrive pacing). Each of these strategies are associated with unique advantages and disadvantages, highlighting the importance of a patient-specific approach when treating these challenging lesions.

Geniculate Artery Endovascular Embolization Post-Total Knee Arthroplasty for Hemarthrosis Treatment: A Systematic Review of the Literature.

To provide an updated systematic review on the use of geniculate artery embolization (GAE) in the management of recurrent hemarthrosis post-total knee arthroplasty (TKA). A systematic literature review was conducted, and all clinical reports in the English language from inception to July 2022 were identified. References were manually reviewed to identify additional studies. Demographics, procedural techniques, post-procedural complications, and follow-up data were extracted and analyzed using STATA 14.1. A total of 20 studies (9 case reports, 11 case series; n= 214) were included for review. In all cases, patients underwent coil embolization of one or more geniculate arteries. Procedure success was reported in 94.8% (n=203/214) of cases without perioperative adverse events. Improvement of symptoms was seen in 72.6% (n=119/164) of cases, with 30.7% (n=58/189) of cases requiring repeat embolization. Recurrent hemarthrosis occurred in 22.2% (n=22/99) of cases over a mean follow-up of 48 months. GAE appears to be a safe and effective treatment for recurrent hemarthrosis following TKA. Future studies in the form of randomized controlled trials should be conducted to further evaluate such embolization techniques and compare outcomes between GAE and standard techniques. Conservative management of post total knee arthroplasty (TKA) hemarthrosis is successful in only one third of cases. Geniculate artery embolization (GAE) has recently gained attention due to its minimally invasive nature compared to open or arthroscopic synovectomy promising faster rehabilitation, decreased infection rates and less additional surgeries. The purpose of this article was to summarize current literature, provide an updated review on the use of GAE in the management of recurrent hemarthrosis post-TKA and describe immediate and long-term outcomes in an effort to help optimize current treatment algorithms.

EMBOLIZATION OF THE INTERNAL ILIAC ARTERY USING LIQUID EMBOLYZING SYSTEMS

Among the complications of endovascular abdominal aortic aneurysm repair the most common are the so–called endoleaks - the preservation of blood flow inside an isolated aneurysmal sac. This complication occurs in almost every fourth patient and is the main cause of reinterventions, which makes the late development of this complication one of the urgent problems under discussions. The report presents a clinical case of treatment of a patient with an aneurysm of the infrarenal abdominal aorta with its spread to the common iliac artery using the technique of preventive embolization of the internal iliac artery with application of a liquid tantalum-containing ethylene vinyl alcohol copolymer. All stages of the operation were performed in the catheterization laboratory using a stationary angiographic system. The embolizing material was introduced after implantation of the stent-graft into the target position, through a microcatheter pre-installed at the ostium of the embolizing internal iliac artery. The introduction of a tantalum-containing ethylene vinyl alcohol copolymer after the installation of the stentgraft, under conditions of significant reduction of arterial antegrade blood flow in the lumen of the internal iliac artery, allowed to create a reliable occlusion of the ostium segment of the artery, reduced the risk of migration of embolizing substance into the distal arterial bed.

Managing False Lumen Patency in Chronic Thoracic Aortic Dissecting Aneurysms With Coil Embolization

Thoracic endovascular aortic repair has become the preferred modality of treatment of complicated type B aortic dissections. However, persistent pressurization of the false lumen can lead to negative aortic remodeling with aneurysmal dilation. Described herein is the coil embolization technique that can be used to manage this complication and a review of the literature on the recent development of management options.

ROLE OF PREOPERATIVE EMBOLIZATION IN BONE TUMORS- A case control study

Preoperative embolization of bone tumor is a minimally invasive angiographic intervention technique and effective adjuvant treatment option for bone tumors. In 1975, Feldman was the rst to use the pre-operative arterial embolization technique to downstage the vascularity of bone tumors, thus reducing blood loss during surgery. Surgery remains the mainstay treatment option for bone tumors. Embolization reduces tumor vascularity and hence decreases intraoperative blood loss and intraoperative blood transfusion. It enables more accurate delineation of tissue planes during surgery, resulting in complete removal of the bone tumor. The most frequent bone tumors that typically need preoperative embolization are those difcult to operate on because of their huge size, high degree of vascularity, proximity to critical tissues, or difcult surgical access. PVA particles are regarded as a workhorse in preoperative transarterial embolization and thus used commonly as an embolizing agent. It is safe procedure and therefore can be used as part of the multidisciplinary approach to the management highly vascular bone tumors.

Comparison of polyvinyl alcohol particles and tris-acryl gelatin microspheres embolic agents used in uterine artery embolization: A systematic review and meta-analysis.

To identify the preferred agent by comparing the therapeutic efficacy, degree of infarction, and side effects of polyvinyl alcohol particles (PVA) and tris-acryl gelatin embolization (TAGM) agents in uterine artery embolization. We included available articles comparing PVA with TAGM embolization agents in the management of fibroids. The primary outcomes included the decrease in uterine volume (%), decrease in dominant tumor volume (%), fibroid infarction rate, complete infarction fibroid, complications, pain score after 24 h, procedure time (minutes), duration of hospital stay, fluoroscopy time (minutes), and the change in symptom severity score. Eight articles that met our inclusion criteria were included in this study. Our analysis yielded an overall superiority of PVA compared to TAGM regarding complete fibroid infarction rate at the first 24 h. However, TAGM was better than PVA concerning <90% infarction rate outcome. While both embolization techniques showed similar effects regarding the change in symptom severity score, the percentage of decrease in uterine volume, percentage of decrease of dominant tumor volume, 90-99% infarction rate, complete infarction rate when assessed after the first 24 h, pain score after the first 24 h, procedure time, fluoroscopy time, minor, and major complications. Both PVA and TAGM embolization agents are effective and safe modalities in treating patients with fibroids, with no significant variation of both agents in most outcomes.

Abstract No. 42 Assessment of Embolic Occlusion of Porcine Kidneys following Different Embolic Techniques

Abstract No. 42 Assessment of Embolic Occlusion of Porcine Kidneys following Different Embolic Techniques

Transcatheter arterial embolization of the subclavian and axillary artery branches for hemorrhage control.

To evaluate the effectiveness and safety of transcatheter arterial embolization (TAE) of the branches of the subclavian and axillary arteries for hemorrhage control. Between January 2015 and June 2022, 35 TAE procedures were performed for hemorrhage from the branches of the subclavian and axillary arteries in 34 patients (22 men, 12 women; 1 male underwent TAE twice; mean age = 76 years). Pre-TAE CT showed hematomas in the chest (n = 25) and abdominal walls (n = 3), shoulder (n = 2), and lower neck (n = 2). CT showed hemothorax in eight cases. Angiographic findings, embolization technique, and technical and clinical success of TAE were retrospectively assessed in all cases. TAE was performed by transfemoral (n = 16), transradial (n = 12), and transbrachial (n = 7) approaches. Angiography revealed contrast media extravasation or pseudoaneurysms in 32 cases (91.4%). The most commonly embolized arteries were the internal thoracic (n = 12), lateral thoracic (n = 6), and thoracoacromial (n = 6) arteries. Technical and clinical success rates were 100 and 85.7%, respectively. A complication (skin necrosis after injection of the liquid embolic agent) developed in only one patient (2.9%) and was conservatively managed. TAE is an effective and safe treatment for hemorrhage from the branches of the subclavian and axillary arteries. Transfemoral approach has been used for TAE of the branches of the subclavian and axillary artery. Transradial and transbrachial approaches can also be considered.

Portal Vein Interventions for Portal Hypertension: Complications and Management

AbstractPercutaneous management of complications of portal hypertension entails reducing portal pressures, controlling varices, and redirecting collateral flow using embolization, obliterative, restorative, recanalization, and shunt creation techniques. Management is based on the clinical status and symptoms and the physiologic and anatomic abnormalities causing portal hypertension. This article briefly describes percutaneous management strategies, their results, and related iatrogenic and physiologic complications.

Embolization in Juvenile Nasopharyngeal Angiofibroma Surgery: A Systematic Review and Meta-Analysis.

To compare outcomes of juvenile nasopharyngeal angiofibroma (JNA) resection between embolized and non-embolized cohorts, and between transarterial embolization (TAE) and direct puncture embolization (DPE). Per PRISMA guidelines, PubMed, Embase, Web of Science, Scopus, and Cochrane databases were searched for publications prior to or in 2021. Original English manuscripts investigating the resection of JNA with and without preoperative embolization were included. Embolization type, recurrence rate, complication rates, blood loss, and transfusions were extracted. Risk of bias was assessed by the Risk of Bias in Non-randomized Studies-of Interventions method. There were 61 studies with 917 patients included. Preoperative embolization was performed in 79.3% of patients. Of those embolized, 75.8% (N=551) underwent TAE and 15.8% (N=115) underwent DPE. JNA recurrence in embolized patients was lower than in non-embolized patients (9.3% vs. 14.4%; odds ratio [OR]: 0.61, 95% confidence interval [CI]: 0.35, 1.06). DPE resulted in lower rates of disease recurrence (0% vs. 9.5%; OR: 0.066, 95% CI: 0.016, 0.272) and complications (1.8% vs. 21.9%; OR: 0.07, 95% CI: 0.02, 0.3) than TAE. A random effects Bayesian model was performed to analyze the difference in mean blood loss in 6 studies that included both embolized and non-embolized patients. This analysis showed a mean reduction in blood loss of 798 mL in the embolized group. We found embolization decreases blood loss in JNA resection. DPE led to improved recurrence and complication rates when compared to TAE, but future prospective studies are needed to further evaluate which embolization technique can optimize outcomes in JNA. NA Laryngoscope, 133:1529-1539, 2023.

Outcomes of Transarterial Embolization for Acute Nonvariceal Upper Gastrointestinal Bleeding: Correlation with Periprocedural Endoscopy

PurposeTo evaluate gastric and intestinal mucosal changes on postembolic endoscopy and mortality after transarterial embolization (TAE) for upper gastrointestinal bleeding (UGIB). Materials and MethodsAn institutional review board–approved retrospective review of patients who underwent arteriography for refractory UGIB at a multicenter health system from December 2003 to August 2019 was performed. Two hundred sixty-nine patients underwent TAE for UGIB. Data on etiology of bleeding, embolization technique, pre-embolic and postembolic endoscopic results, blood product requirements, and mortality were collected from the medical record. Endoscopy results were compared at the site of the target lesion before and after TAE. Multivariable logistic regressions were performed to assess predictors of new adverse mucosal responses and mortality. ResultsThe most common etiology of UGIB was peptic ulcer. Twenty-five percent (n = 68) of the patients had clinical evidence of rebleeding after TAE, and the 30-day mortality rate was 26% (n = 73). Eighty-eight (32%) patients underwent post-TAE endoscopy, with only 15% showing new adverse mucosal changes after embolization. Procedural characteristics, including vascular territory and embolic choice, were not significantly predictive of increased risk of development of adverse mucosal response after TAE or increased mortality risk. No patients in the study were found to have bowel lumen stenosis at the time of post-TAE endoscopy or at 6 year follow-up. ConclusionsTAE is a safe and effective intervention for patients with UGIB. Post-TAE endoscopy demonstrated that most patients had either stability or improvement in the target lesion after TAE, and only a minority of patients demonstrated adverse mucosal changes.