TransAtlantic Inter-Society Consensus Research Articles

Results from a multicenter retrospective study of transradial iliac artery stenting in Japan.

Large-scale multicenter studies demonstrating the safety and effectiveness of transradial iliac artery stenting are lacking. We evaluated the data from a multicenter database in Japan. Transradial iliac artery stenting was performed on 115 lesions in 105 patients. The approach site was determined at the discretion of the operator. Patients with scheduled multiple sheath insertions for the bidirectional approach were excluded. Clinical data were retrospectively analyzed. The average age of this cohort was 71.1 ± 8.3years. Eighty-six patients (81.9%) were male. Diabetes mellitus, hypertension, dyslipidemia, and smoking habit were present in 39 (37.1%), 84 (80.0%), 69 (65.7%), and 78 patients (74.3%), respectively. Rutherford classifications 1, 2, 3, 4, and 5 comprised 40 (34.8%), 42 (36.5%), 28 (24.3%), 3 (2.6%), and 2 (1.7%) lesions, respectively, while Trans-Atlantic Inter-Society Consensus II classifications A, B, C, and D comprised 74 (64.3%), 21 (18.3%), 15 (13.0%), and 5 (4.3%), respectively. Twenty-seven lesions (23.5%) had chronic total occlusion. All lesions were successfully treated with 141 stents. Four patients (3.8%) required additional puncture of the common femoral artery for successful stent implantation. The ankle-brachial index significantly improved from 0.65 ± 0.17 to 0.95 ± 0.15 (P < 0.0001). None of the patients experienced any procedural or access site-related complications. Asymptomatic radial artery occlusion was observed in three cases (2.9%) after the procedure. There were no target lesion revascularizations or complications at 1month. Compared to the traditional transfemoral approach, transradial iliac artery stenting is safe and feasible without any specific complications in carefully selected patients.

Staged versus nonstaged elective hybrid iliofemoral revascularization – analysis of ten years of prospective data

Reports of large series of hybrid iliofemoral revascularization for chronic lower limb ischemia are scarce. The aims of this study were to evaluate outcomes for staged and non-staged procedures, and to evaluate risk factors for outcomes at 90 days. Patients were consecutively included between 2013 and 2023. Surgical site infection (SSI) was defined by the ASEPSIS criteria and major adverse limb events (MALE) as onset of acute or continuing or worsening chronic limb ischemia or major amputation. Factors associated with outcomes were tested in a multivariable logistic regression analysis and expressed in Odds ratios (OR) with 95% confidence intervals (CI). Patients undergoing non-staged procedures (n=124) had higher TASC (Trans-Atlantic Inter-Society Consensus) class representing anatomical occlusive complexity, more often through-and through femoral guidewire access, more endoprosthesis, more covered stents, longer procedure time with open groin wounds, and less contralateral femoral access, than those undergoing staged procedures (n=31). The median time interval between the staged procedures was one day, and iliac stenting was done first in 77%. The median in-hospital stay was non-significantly longer in staged procedure (8 versus 6 days, p=0.053). The overall SSI and MALE rates were 25.8% and 20.0%, respectively, without differences between groups. Diabetes mellitus (OR 3.7, 95% CI 1.2 - 7.2]) and presence of a foot ulcer (OR 3.7, 95% CI [1.5 - 9.4]) were independently associated with MALE at 90 days. Postoperative hyperglycemia was non-significantly associated with SSI (OR 2.1 [95% CI 1.0 - 4.5], p=0.066) in multivariable analysis. The risks of SSI and MALE after elective hybrid iliofemoral revascularization were high. There appears to be no benefit in performing staged as opposed to non-staged procedures. The extent of iliofemoral occlusive disease according to the TASC classification had little influence on outcomes whereas diabetes mellitus and presence of a foot ulcer had greater impact on MALE.

Role of Retrograde Tibiopedal Access in Limb Salvage in Patients with Critical Lower Limb Ischemia

AbstractThe aim of this study was to assess the efficacy and safety of retrograde tibiopedal access as an alternative approach in cases of critical limb ischemia (CLI) when antegrade access has failed. A prospective study was conducted that included patients with CLI who underwent tibiopedal access after failed antegrade recanalization from January 2018 to June 2022. Follow-up was conducted at 6, 12, and 24 months. The primary outcomes evaluated were technical success rate and primary patency. Secondary outcomes included complication rate, mortality rate, and limb salvage rate (LSR). Forty-eight patients had CLI and Trans Atlantic Inter-Society Consensus infrainguinal lesions. The retrograde approach was used through the anterior tibial artery in 28 patients (58%), the posterior tibial artery in 18 patients (37.5%), and the peroneal artery in 2 patients (4.5%). Technical success was achieved in 90% of patients (43 patients). There was a significant increase in the anklebrachial index after the procedure with a mean follow-up of 22 months. Twenty-two months primary patency rate was 85.2%, while secondary patency rate was 100% and LSR was 96%, respectively. There was no mortality in the series. Retrograde tibiopedal approach is an alternative option for managing peripheral arterial disease and CLI. This method offers another means of crossing lesions when antegrade access failed, and the intervention can be completed either in an antegrade or retrograde approach. As the retrograde approach does not impact access site, considered a feasible safe treatment alternative which increase the success rate of endovascular treatment.

Evaluation of systemic immune-inflammation index for predicting severity of lower extremity arterial disease.

Predictive value of systemic immune-inflammation index (SII) has been shown in clinical outcomes and complexity of coronary artery disease, acute coronary syndrome, and heart failure. We sight to evaluate value of SII in patients with lower extremity arterial disease (LEAD). A total of 271 patients diagnosed with LEAD were included to our study. Blood samples of the patients were collected and analyzed for biochemical variables and complete blood count parameters. SII value of each patient was calculated. The complexity of atherosclerotic disease was classified according to Trans-Atlantic Inter-Society Consensus (TASC II) classification. Patients with TASC C-D were older than patients in TASC A-B group (63.06 ± 9.24years and 60.85 ± 8.75years, respectively). Other co-morbidities were comparable in both groups. Hemoglobin level and lymphocyte count were significantly lower, neutrophil, platelet counts, and SII values were significantly higher in patients with TASC C-D disease compared to that of patients with TASC A-B disease. SII showed significant correlation with the severity of LEAD (r = 0.363, p < .001). SII value of 664.24 predicted TASC C-D disease with a sensitivity and specificity of 60.8% and 73.3%, respectively. Results of multivariate logistic regression analysis showed that SII had higher odds ratio compared to platelet, neutrophil, and lymphocyte counts. Higher SII may indicate probability of more complex LEAD. This relationship seems plausible in terms of similar pathophysiology of coronary artery disease and peripheral artery disease.

Intravascular Ultrasound Use is Associated with Improved Patency in Lower Extremity Peripheral Arterial Interventions

ObjectivesIntravascular ultrasound (IVUS) facilitates detailed visualization of endoluminal anatomy not adequately appreciated on conventional angiography. However, it is unclear if IVUS use improves clinical outcomes of peripheral vascular interventions (PVI) for peripheral arterial disease (PAD). This study aimed to evaluate the impact of IVUS on 1-year outcomes of PVI in the vascular quality initiative (VQI). MethodsThe VQI-PVI modules were reviewed (2016-2020). All patients with available one-year follow up after lower extremity PVI were included and grouped as IVUS-PVI or non-IVUS PVI based on use of IVUS. Propensity matching (1:1) was performed using demographics and comorbidities. One-year major amputation and patency rates were compared. A generalized estimating equation (GEE) model was used to identify predictors of 1-year outcomes. Subgroup analysis based on Trans-Atlantic Inter-Society Consensus (TASC) classification, treatment length and treatment modalities were performed using same modeling approaches. ResultsThere were 56,633 procedures (non-IVUS PVI=55,302 vs IVUS-PVI=1,331) in 44,042 patients. Propensity matching yielded a total cohort of 1,854 patients matched (1:1), with no baseline differences. LER for claudication was performed in 60.4%, while one-third (33.9%) had chronic limb threatening ischemia (CLTI). IVUS was more commonly used for lesions >15cm in length (46.6% vs 43.3%) and for aortoiliac disease (31.8% vs 27.2%). Rates of atherectomy and stenting were significantly higher with IVUS-PVI (21.1% vs 16.8%), while balloon angioplasty was less common (13.5% vs 24.4%). One-year patency was better with IVUS-PVI (97.7% vs 95.2%, p=0.004). On subgroup analysis, IVUS (OR 2.20, 95% CI 1.29- 3.75) was associated with improved patency in CLTI patients, TASC C or D lesions, and treatment length >15cm. Adjunctive IVUS use during PVI did not significantly impact 1-year amputation (OR 1.7, 95%CI 0.78-3.91). On multivariable regression, adjunctive use of IVUS (OR 2.46 95%CI 1.43-4.25) and aortoiliac interventions (OR 2.91, 95%CI 1.09-7.75) were independent predictors of patency. Treatment modalities such as atherectomy, stenting or balloon angioplasty did not significantly impact patency at 1-year. ConclusionIVUS during lower extremity PVI is associated with improved 1-year patency, when compared to angiography alone. Certain subgroups, such as CLTI patients, lesions>15cm, and TASC C or D lesions might benefit from adjunctive use of IVUS.

Influence of Preprocedural Statin Usage on Primary Patency and Amputation in Patients Undergoing Lower Limb Peripheral Angioplasty

Peripheral arterial disease can progress to critical limb ischemia, which is associated with high amputation rates and requires revascularization. The endovascular approach has lower long-term patency because of restenosis due to neointimal hyperplasia. Statins are significantly advantageous for patients undergoing percutaneous interventions; however, only few studies have reported surgical improvements with statin therapy after endovascular treatment in such patients. This retrospective cohort study assessed the effects of preprocedural statins on lower limb arterial angioplasty outcomes by evaluating patency and amputation rates and comparing with those without statins. Patients who underwent percutaneous transluminal angioplasty of the lower limbs for critical ischemia of the lower limbs or for limiting claudication were included in this retrospective cohort study. Patients were categorized according to statin use prior to and during hospitalization. Patient demographics, lesion morphology, primary patency, and limb salvage rates were compared between these groups. Statistical analyses were performed using Kaplan-Meier and multivariate regression analysis. A total of 178 patients undergoing endovascular intervention by critical ischemia or limiting claudication were included. Approximately 80% of the procedures were ballon angioplasty. Primary patency was 73% in 1year and preprocedural statin usage was not associated with improved primary patency rates (P=0.2798). After adjusting the amputation outcomes for pre-established variables, such as prehospitalization statin use, diabetes, procedure indication, disease location, Trans-Atlantic Inter-Society Consensus classification, and current smoking, there was no statistically significant difference associated with preprocedural statin use in primary patency (hazard ratio: 0.87 [0.33-2.29], P=0.79) or amputation (hazard ratio: 0.70 [0.40-1.23], P=0.22). The use of preprocedural statin did not improve primary patency or amputation rates in patients undergoing peripheral angioplasty.

Treatment of Aortoiliac Occlusive Lesions by Aortic Robotic Surgery: Learning Curve and Midterm Outcome

The learning curve and midterm results of aortoiliac occlusive disease (AIOD) revascularization by robot-assisted laparoscopic (RAL) surgery may be known. A prospective single-center study was conducted in the vascular surgery department of Georges Pompidou European Hospital (Paris, France). Patients with AIOD treated by RAL from February 2014 to February 2019 were included. Demographic characteristics, past medical history, Trans-Atlantic Inter-Society Consensus (TASC) lesions classifications, mortality, primary and secondary patency, as well as complication rates were collected. Safety was analyzed by the cumulative sum control chart method with a conversion rate of 10%, operative time by cumulative average-time model, and primary and secondary patency by the Kaplan-Meier method. Seventy patients were included, 18 (25.7%) with TASC C lesions and 52 (74.3%) with TASC D lesions. Before discharge, 14 (24.3%) patients had surgical complications. Among them, 10 (14.3%) required at least one reintervention. One (1.4%) patient died during the hospitalization. The learning curve in terms of safety (conversion rate) was 13 cases with an operating time of 220minutes after 35 patients. During follow-up (median 37months [21; 49]), 63 patients (91.3%) improved their symptoms, 53 (76.8%) became asymptomatic, and 3 graft limb occlusions occurred. The primary patency at 12, 24, 36, and 48months was 94%, 92%, 92%, and 92%, respectively, while the secondary patency for the same intervals was 100%, 98.1%, 98.1%, and 98.1%, respectively. Robotic surgery in AIOD revascularization seems safe and effective; allowing to treat patients with few comorbidities and severe lesions, in a dedicated center experienced in RAL, with excellent patency. Prospective clinical trials should be performed to confirm safety.

Early and midterm results of covered balloon-expandable stents (VBX-Gore) for endovascular treatment of chronic aorto-iliac occlusion.

Endovascular treatment is nowadays accepted as first-line treatment for most patients with aorto-iliac obstructive disease (AIOD), including those with Trans-Atlantic Inter-Society Consensus II (TASC-II) lesion types C and D. Aim of the study was to evaluate the role of Viabahn VBX (W. L. Gore and Associates, Flagstaff, AZ, USA), in patients with chronic occlusive aorto-iliac disease (ChO). A retrospective review of patients undergone elective endovascular repair with VBX (W. L. Gore and Associates) for ChO at five referral vascular institutions in Italy from 2018 to 2022 was conducted. Primary endpoints were technical success and the incidence of any early and midterm procedure-related reintervention. Secondary endpoints were clinical success, primary and secondary patency. Among 89 included patients, technical success was obtained in 87 patients (97.8%). Postoperative complication requiring early surgical reintervention was necessary in 5 (6%), all but one for arterial bleeding. Clinical improvement of at least 3 classes was observed in 49 (55%). After a mean follow-up of 24.1 months ±14.1, primary patency and freedom from any procedure-related reintervention at 12, 24 and 36 months was 83.0% and 94.8%, 80.0% and 91.5%, 77.9% and 89.3%, respectively. Secondary patency was 100%. TASC-II D lesion (OR=3.67, 95% CI: 1.1289-11.9823, P=0.03) and Grade III iliac calcification (OR=3.41, 95% CI: 1.0944-10.6428, P=0.03) were identified as independent predictors for procedure-related reintervention. Use of VBX (W. L. Gore and Associates) in ChO was safe and effective with low rate of stenosis/occlusion in the early and mid-term follow-up. TASC-II D and Grade III calcifications resulted as independent predictors for procedure-related reintervention.

Efficacy and Safety of Covered Stents Versus Bare-Metal Stents for Aortoiliac Occlusive Disease: A Systematic Review and Meta-Analysis.

This study aimed to assess the efficacy and safety outcome of covered stents (CSs), as compared with bare-metal stents (BMSs), for the treatment of patients with aortoiliac occlusive disease (AIOD). A systematic literature search was conducted in PubMed, Embase, and Cochrane Library up to August 2023 to identify all studies comparing efficacy and safety outcomes of CSs versus BMSs for treating AIOD. Our outcome was primary patency, secondary patency, technical success, ankle-brachial index (ABI) variation, target lesion revascularization (TLR), limb salvage, complications, and long-term survival. Dichotomous outcomes were pooled as relative risks (RR) or hazard ratio with the 95% confidence interval (CI). Continuous outcomes were pooled as weighted mean differences and 95% CI. Model selection was based on the heterogeneity of the included studies. There were 10 studies (2 randomized controlled trials, 8 retrospective cohort studies), comprising 1676 sample size. Compared with BMSs, CSs use was associated with better primary patency of patients with a Trans-Atlantic Inter-Society Consensus II (TASC) D lesion (RR, 1.15, 95% CI, 1.04 to 1.27, p=0.007), TLR (RR, 0.39, 95% CI, 0.27 to 0.56, p<0.001), technical success (RR, 1.01, 95% CI, 1.00 to 1.02, p=0.010), and long-term survival (RR, 1.06, 95% CI, 1.01 to 1.11, p=0.020). There is no difference between CSs and BMSs regarding primary patency of all patients, secondary patency, variation in ABI, limb salvage, and complications. Compared with BMSs, CSs used in AIOD was associated with more favorable primary patency in patients with TASC D lesions, TLR, technical success rates, and patient long-term survival. These results provide evidence of the advantages of using CSs for AIOD treatment. Future studies focusing on long-term variations in ABI, primary patency of different degrees of calcification, vascular segments, and TASC classification are warranted. Although several studies evaluated the clinical efficacy of CS in the context of AIOD treatment, the significance and consistency of these findings were not determined to date. We found that CS was used in AIOD associated with better technical success rate, long-term patient survival, lower target lesion revascularization, and higher primary patency of patients with a Trans-Atlantic Inter-Society Consensus II D lesion when compared with BMSs. Our study provides evidence supporting the superiority of CSs over BMSs in the treatment of AIOD, and furnishing clinicians with guidance for treatment decisions.

Comparative outcomes of aortobifemoral bypass with or without previous endovascular kissing stenting of the aortoiliac bifurcation

ObjectiveThe aim of this multicenter national study was to compare the outcomes of primary open surgery by aorto-bifemoral bypass (ABFB) with those performed after a failed endovascular treatment (EVT) by kissing stent technique for complex aortoiliac occlusive disease (AIOD) lesions (TransAtlantic Inter-Society Consensus [TASC] II C and D). MethodsAll consecutive ABFB cases carried out at 12 vascular surgery centers between 2016 and 2021 were retrospectively collected and analyzed. Data included patients’ baseline demographics and clinical characteristics, procedural details, perioperative outcomes, and follow-up results (survival, patency, amputation). The study cohort was divided into two groups based on indications for ABFB: primary treatment vs secondary treatment after EVT failure. ResultsOverall, 329 patients underwent ABFB during the study period (71% males; mean age, 64 years), of which 285 were primary treatment and 44 were after prior EVT. At baseline, no significant differences were found between study groups in demographics and clinical characteristics. TASC C and D lesions were similarly represented in the study groups (TASC C: 22% vs 78%; TASC D: 16% vs 84%). No major differences were found between study groups in terms of procedural details, early mortality, and perioperative complications. At 5 years, primary patency rates were significantly higher for primary ABFB (88%; 95% confidence interval [CI], 93.2%-84%) as compared with ABFB after prior EVT (69%; 95% CI 84.9%-55%; log rank P value < .001); however, the 5-year rates of secondary patency (100% vs 95%; 95% CI, 100%-86%) and limb salvage (97%; 95% CI, 99%-96 vs 97%; 95% CI, 100%-94%) were similar between study groups. ConclusionsSurgical treatment of TASC C/D AIOD with ABFB seems to be equally safe and effective when performed after prior EVT, although primary ABFB seemed to have higher primary patency rates. Despite the need for more frequent reinterventions, secondary patency and limb salvage rates were similar. However, future large prospective trials are required to confirm these findings.

Predictors of Crossing Failure in Femoropopliteal Lesions: The Importance of Length of the Lesion and Calcification

IntroductionEndovascular therapy is nowadays the first choice for most patients with peripheral artery disease. The most important cause of technical failure is failure to cross the lesion with a wire. In this retrospective study we explore possible risk factors of crossing failure. PatientsWe included all consecutive patients in whom the lesion could not be crossed in the period of the 1th January 2017 to 1th January 2022. The lesions of these patients were compared with patients in whom the lesion could be crossed (2:1). The following potential anatomical risk factors were compared: location of the lesion, occlusion length, lesion length, Peripheral Arterial Calcium Scoring Scale, Peripheral Academic Research Consortium, circumferential characterization classification and the TASC II classification. ResultsIn 71 patients the lesion could not be crossed, these patients were compared with 142 patients. There were significantly more patients with hypertension and hyperlipidemia in the group with crossing failure. The following factors were risk factors for crossing failure: occlusion length, lesion length, Peripheral Arterial Calcium Scoring Scale, Peripheral Academic Research Consortium and circumferential characterization classification. Discussions and conclusionAlthough conclusions should be carefully drawn from this retrospective study, calcification and length of the lesion are associated with crossing failure in the femoropopliteal segment. The Trans-Atlantic Inter-Society Consensus (TASC) II classification was the best predictor of crossing failure.

Mid-term Results of Endovascular Reconstruction of Aortic Bifurcation Using COVERA Stent Graft.

This article aims to evaluate the short-term and mid-term performance of a self-expanding covered stent (COVERA Plus, Bard Tempe, Arizona) during the treatment of Trans-Atlantic Inter-Society Consensus (TASC) C/D aortoiliac obstructive lesions involving the aortic bifurcation. A single-center retrospective review of all patients who underwent endovascular reconstruction of the aortoiliac bifurcation for obstructive disease, with the use of Covera, from January 2018 to March 2023. All patients received a postoperative CTA (computed tomography angiography) scan within 1 month from the intervention. Precision of deployment, stent conformation, and stent symmetry were evaluated at the arterial phase of the CTA. Early outcomes were technical success and freedom from open aortic reintervention and/or mortality. Late outcomes were primary and assisted primary patency rates and freedom from reintervention. During the study period, 35 patients underwent primary endovascular treatment of obstructive lesions involving the aortic bifurcation with parallel COVERA stents. Aortoiliac lesions were classified as TASC-IIC in 23 (65.7%) patients and TASC D in 12 (34.2%). Median follow-up was 49 months (interquartile [IQR]: 18-60). Overall survival was 97.1% (95% confidence interval [CI]=91-100) at 60 months. During follow-up, there were one early stent stenosis, treated with an angioplasty and stent relining with an estimated primary patency at 60 months of 97.1% (95% CI=94-100) and a primary-assisted patency of 100%. Estimated freedom from all types of reinterventions at 60 months was 94.3% (95% CI=89-99.3). The new self-expanding covered Bard COVERA Plus stent used for endovascular treatment of TASC C/D aorto iliac disease proved to be safe and feasible with high technical procedural success rates. Comparison with other types of stents is necessary to further assess the role of the COVERA Plus stent in aortic bifurcation repair. This study investigates the safety and feasibility of the new self-expanding covered Bard Covera Plus stent used for endovascular treatment of TASC C/D aorto iliac disease. The retrospective analysis of 35 patients highlights high technical success and primary patency rate at 60 months. The geometric analysis also helped to underline how this stent can be used precisely in particular conditions. These findings suggest the need for further research to compare COVERA with other types of stents in aortic bifurcation repair.

Safety and efficacy of kidney transplantation in patients with aortoiliac stenosis: a retrospective cohort study.

The impact of aortoiliac occlusive disease on kidney transplantation remains unclear. This study aims to investigate the clinical outcomes of kidney transplant patients with aortoiliac atherosclerotic stenosis. Retrospective data from our transplant center were used to identify patients undergoing kidney transplantation between January 2010 and December 2020. Aortoiliac atherosclerotic stenosis was screened and stratified by the Trans-Atlantic Inter-Society Consensus (TASC) II classification. The primary outcome was patient survival. Secondary outcomes were 90-day mortality, death-censored graft survival, graft function, and arterial complications. Propensity score matching was used to match all patients in the stenosis group with patients without stenosis sharing similar characteristics. The analysis included 655 patients, 524 without stenosis and 131 with aortoiliac stenosis (95 with TASC A/B stenosis and 36 with TASC C/D stenosis). Recipient age [median (IQR), 66 (60-70) vs. 66 (59-71) years; P =0.47], sex [male: 87 (66%) vs. 355 (68%), P =0.85], and comorbidities were comparable between the stenosis and no-stenosis groups. Forty-six (35%) patients with stenosis were symptomatic. Patient survival was significantly lower in the stenosis group compared with the no-stenosis group (TASC A/B: 30.6% vs. no-stenosis: 44.1%, P =0.013; TASC C/D: 11.4% vs. no-stenosis: 44.1%, P <0.001). The incidence rates of artery dissection, lower extremity ischemia, and acute thrombosis were significantly higher in the stenosis group ( P <0.001). However, death-censored graft survival (TASC A/B: 73.6% vs. no-stenosis: 72.9%, P =0.62; TASC C/D: 58.1% vs. no-stenosis: 72.9%, P =0.16) and graft function were comparable between the groups. Aortoiliac atherosclerotic stenosis significantly impacts patient survival but not graft survival. Our analyses suggest that patients with TASC A/B stenosis have prolonged survival and enhanced quality of life through kidney transplantation. However, for patients with TASC C/D stenosis, kidney transplantation improves quality of life without bringing survival benefits.

Endovascular recanalization of infra-popliteal TASC C and TASC D lesions in patients with critical limb-threatening ischemia: a single-center experience.

The present study aims to (1) assess the technical success and limb salvage rates of endovascular therapy in patients with critical limb-threatening ischemia (CLTI) and infra-popliteal Trans-Atlantic Inter-Society Consensus (TASC) C/D lesions according to the updated 2015 TASC II classification and (2) to present our institutional experience. A single-center retrospective study was conducted on patients with TASC C/D CLTI who underwent endovascular treatment between 2012 and 2017. The follow-up protocol consisted of Doppler ultrasound conduction every 3 months for the first year unless patients showed symptoms of CLTI. Patients with at least 1 year of follow-up data were included in the study, and if applicable their 3-year results were evaluated in terms of primary patency, absence of amputation, amputation-free survival, and overall survival. A total of 248 patients and 287 limbs (238 TASC D lesions and 49 TASC C lesions) were treated via infra-popliteal percutaneous transluminal angioplasty. The overall technical success was 87%, the primary patency rate was 41.5% in the first year, and the freedom from amputation rates were 80.8% in 1 year and 67.7% in 3 years. In patients with infra-popliteal arterial occlusive diseases, endovascular treatment methods demonstrate a high rate of technical success and favorable outcomes in limb preservation.

Triglyceride-glucose index for predicting in-stent restenosis in patients with iliac artery stenosis after percutaneous intervention with stents.

To evaluate the triglyceride-glucose index (TyG index) for predicting in-stent restenosis in patients with iliac artery stenosis after percutaneous intervention with stents. Subjects with iliac artery stenosis, who underwent an iliac stent intervention and were followed up for at least 2 years were included in the study. Subjects were grouped according to TyG index (Group A, TyG index ≤8.848; Group B 8.849 ≤TyG index ≤9.382 and Group C TyG index ≥9.383). The subject's baseline characteristics, blood parameters, claudication distance, Transatlantic Intersociety Consensus classification, target lesion localization, stent direction, number of stents that were applied, and stent type were noted. Pre- and 1st and 2nd-year post-procedure Rutherford statuses, ankle-brachial index, and stenosis degree were recorded. To calculate the sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV), Group B and Group C were combined and compared with Group A. In total, 255 subjects were evaluated (female, n=77-30.2%, male, n=178-69.8%). The mean age of the subjects was 66.00±10.00 years (range from 39 to 90 years). The pre-procedure Rutherford measurements were significantly different among the groups (p=0.001). The rates of mild claudication and resting pain in Group A were higher than those in Groups B and C. The rate of moderate claudication in Group C was higher than that in Groups A and B. The rate of severe claudication in Group B was higher than that in Groups A and C. One year after the procedure, there were more asymptomatic cases in Group A than in Groups B and C (p=0.001). The rate of mild claudication in Group C was lower than that in Groups A and B. The rate of moderate claudication in Group C was higher than that in Group A. The rate of severe claudication in Group C was higher than that in Groups A and B. Two years after the procedure, the Rutherford measurements and the rates of mild claudication in Groups A and B were higher than those in Group C. The rate of severe claudication in Group C was higher than that in Groups A and B (p=0.001). One year after the procedure, the computed tomography angiography (CTA) measurements and the rate of full patency in Group A were higher than that in Groups B and C. The rate of 0-50% stenosis in Group B was higher than that in Groups A and C. The rate of 50-70% stenosis in Group C was higher than that in Group A. Two years after the procedure, the CTA measurements and the rates of 70-99% stenosis and 100% occlusion in Group C were higher than those in Groups A and B. The TyG index has high specificity and NPV. However, specificity and PPV levels were found to be quite low. The TyG index was found to be an easy-to-use marker for predicting in-stent restenosis in patients with iliac artery stenosis after percutaneous intervention with stents.

10년간의 3차 의료기관 경험을 바탕으로 한 대동맥장골동맥 폐색 질환 혈관내 치료의 기술적 고찰: 후향적 연구.

To examine the technical considerations of endovascular treatment for aortoiliac occlusive disease (AIOD) based on a 10-year experience in Songklanagarind Hospital. This retrospective cohort study included 210 patients who underwent endovascular treatment for symptomatic AIOD between January 2010 and December 2020. The patients' clinical and lesion characteristics, including technical considerations of the procedure, were collected, analyzed, and stratified using the Transatlantic Inter-Society Consensus (TASC). Most patients (80%) in this study had chronic limb-threatening ischemia lesions, with an occlusion rate of 37%. The technical success rate of TASC C & D was lower than that of TASC A & B, 84.4% vs. 99.2% p ≤ 0.001. A technical success rate of 93.3% (14/15) was found for the femoral and brachial approach, compared with a success rate of 89.0% (57/64) for the unibifemoral approach in TASC C & D, without a statistically significant difference (p = 0.076). However, the puncture site complications in this route were up to 17.6%, which is the highest rate compared with other techniques. These complications could be treated either conservatively or minimally invasively. In cases of failed femoral access, simultaneous femoral and brachial approaches improved the technical success rate of endovascular recanalization of TASC C & D aortoiliac occlusions.

Endovascular Treatment of TASC C and D Femoropopliteal Arterial Disease With Heparin-Bonded Covered Stents: The Impact of Distal Run-Off Vessels.

In the last 2 decades, several studies in the literature evaluated the possible role of covered stents in the treatment of TransAtlantic Inter-Society Consensus (TASC) C and D femoropopliteal lesions but, despite the encouraging results, the employment of these devices was never included in clinical guidelines. The aim of this study is to evaluate the role of the technical aspects in patients with TASC C or D lesions that were treated with the GORE VIABAHN endoprosthesis and to elaborate a computerized method to objectively estimate the post-stent run-off and predict stent-graft failure. In this monocentric retrospective study, we collected the patients who were treated in our department from December 2014 to May 2021. Inclusion criteria comprised: (1) patients who underwent endovascular treatment of a TASC C or D femoropopliteal lesions using one or more heparin-bonded covered stent(s) and (2) clinical follow-up >2 years. Exclusion criteria were clinical follow-up <2 years or missing. An in-house computerized analysis to estimate the post-stent run-off, CEVERO (Computerized Estimation of VEssel Run-Off), was elaborated. Sixty-six patients were enrolled in the study. Eleven patients had a TASC type C lesion, and 55 patients presented a type D lesion. The median follow-up time was 2.6 years. Twenty-nine patients (43.9%) experienced a major adverse limb event. Primary patency after 6, 12 and 24 months was 74.2%, 60.6%, and 57.6%; primary-assisted patency was 78.8%, 65.2%, and 59.1%. The presence of <2 run-off vessels (p<0.001) was correlated with stent-graft failure. The CEVERO analysis demonstrated an accuracy of 90.0% in predicting stent-graft failure. The treatment of TASC C and D femoropopliteal lesions remains technically challenging. Our study supported the hypothesis that run-off is the most critical factor in determining the outcome of the procedure and that concomitant angioplasty of the tibial vessels might improve the patency of the covered stent. The CEVERO analysis could permit a real-time, objective estimation of the distal run-off using conventional angiographic images, and it might be employed as a tool in the intraprocedural decision-making process, but its clinical applicability should be evaluated on external validation cohorts. The endovascular treatment of TASC C and D femoropopliteal lesions is technically challenging and run-off seems to be the most critical factor in determining the outcome. Concurrent angioplasty of the tibial vessels can create adequate run-off to avoid stent failure. The CEVERO analysis is a computerized estimation of run-off that might be a useful tool in the decision-making process.

Technical Success, Midterm Primary Patency, and Factors Affecting Primary Patency of Subintimal Angioplasty Followed by Vasculomimetic Stenting for Trans-Atlantic Intersociety Consensus II C and D Femoropopliteal Arterial Disease—A Prospective Study

Abstract Background The best option among the endovascular options in long, complex femoropopliteal (FP) lesions, and factors affecting the patency have yet to be well described. There are few studies describing the mid- and long-term patency of endovascular stents in long-segment FP occlusions. Aim This study aimed to determine the technical success and mid-term patency of subintimal angioplasty with vasculomimetic stenting in Trans-Atlantic Inter-Society Consensus II (TASC) C and D FP disease. The patient and imaging factors that affect primary patency were also analyzed. Methods and Materials A single-center prospective study was performed on 52 consecutive patients undergoing endovascular treatment for TASC C and D FP disease from 2017 to 2021. Angioplasty with stenting was performed in all patients and followed up for 36 months. Endpoints were primary patency rates and amputation-free survival of the limb. Kaplan–Meier curves were used to see patency rates and amputation-free survival rates. Results A total of 52 patients underwent stenting with a technical success rate of 100% if the sub-intimal arterial flossing with antegrade-retrograde intervention (SAFARI) technique was used. Primary stent patency at 6, 12, 18, 24, and 36 months was 89.8, 81.4, 76.2, 71.4, and 62.5%, respectively. Amputation-free survival was 98, 95.6, 91.8, and 85.7% at 12, 24, 30, and 36 months, respectively. Cox proportional regression analysis showed smoking and vessel wall calcium score more than 270 degrees as independent predictors of loss of primary patency (hazard ratio 0.35 confidence interval [CI]: 0.003–0.448) and 0.102 (CI: 0.022–0.47), respectively. Conclusion Subintimal angioplasty with vasculomimetic stent has good midterm patency in and amputation-free survival in long-segment FP occlusions. Smoking and severe vessel wall calcification adversely affect patency.

Differences between Lower Extremity Arterial Occlusion vs. Stenosis and Predictors of Successful Endovascular Interventions.

Background and Objectives: In patients with peripheral artery disease, there is insufficient understanding of characteristics that predict successful revascularization of the lower extremity (LE) chronic total occlusions (CTOs) and baseline differences in demographic, clinical, and angiographic characteristics in patients with LE CTO vs. non-CTO. We aim to explore these differences and predictors of successful revascularization among CTO patients. Materials and Methods: Two vascular centers enrolled LE-CTO patients who underwent endovascular revascularization. Data on demographics, clinical, angiographic, and interventional characteristics were collected. LE non-CTO arterial stenosis patients were compared. A total of 256 patients with LE revascularization procedures were studied; among them, 120 had CTOs and 136 had LE stenosis but no CTOs. Results: Aspirin use (Odds ratio, OR: 3.43; CI 1.32-8.88; p = 0.011) was a positive predictor whereas a history of malignancy (OR: 0.27; CI 0.09-0.80; p = 0.018) was a negative predictor of successful crossing in the CTO group. The CTO group had a higher history of myocardial infarction (29.2 vs. 18.3%, p = 0.05), end-stage renal disease (19.2 vs. 9.6%, p = 0.03), and chronic limb-threatening ischemia as the reason for revascularization (64.2 vs. 22.8%, p < 0.001). They were more likely to have advanced TransAtlantic Inter-Society Consensus (TASC) stages, multi-vessel revascularization procedures, longer lesions, and urgent treatment. Conclusions: The use of aspirin is a positive predictor whereas a history of malignancy is a negative predictor for successful crossing in CTO lesions. Additionally, LE-CTO patients have a higher incidence of comorbidities, which is expected given their higher disease burden. Successful endovascular re-vascularization can be associated with baseline clinical variables.

Efficacy Analysis of Drug-Coated Balloons in the Treatment of Ultra-Long Segment Lesions of Femoral Popliteal Artery

PurposeTo evaluate the mid-term clinical efficacy of paclitaxel drug-coated balloons (DCBs) in the treatment of femoral artery Transatlantic Inter-Society Consensus (TASC) grades C/D lesions. MethodsThe clinical data of 73 cases with TASC grades C/D lesions of femoral artery treated with paclitaxel DCBs at the Department of Vascular Surgery, the First Hospital of Fujian Medical University from August 2016 to January 2020 were retrospectively analyzed. The primary endpoint was primary patency rate. The secondary endpoints were freedom from re-intervention, Rutherford classification, ankle branch index (ABI), amputation events, and all-cause death. ResultsA total of 73 cases of limb lesions received endoluminal treatment. The mean age of the patients including 49 males and 24 females was (72.66±11.1) years, with an initial Rutherford classification of 2-5 and an ABI of 0.4±0.1. The mean Rutherford classification was 3.70±0.95. The mean lesion length was (25.75±9.67) cm, including 61.64% chronic occlusive lesions and 27.39% stenotic lesions, the remaining 10.97% were mixed lesions, containing multiple segments of stenosis and CTO lesions. 43.8% of the lesions were associated with severe calcification. Stent implantation rate was 8%. Overall mortality at follow-up was 4% at 1 year and 8% at 2 years,and no amputations seen. The ABI was 0.83±0.07 at 1-year follow-up and 0.78±0.05 at 2-year follow-up. The Kaplan-Meier survival curve predicted 1-year phase I patency rate was 75.3%±5% and the 2-year patency rate was 63.3%±5.7%. Freedom from TLR was 78.4±4.9% at 1 year and 69.2%±3.6% at 2 years. Logistic regression analysis showed that diabetes mellitus, severe calcification, chronic renal insufficiency and restenosis were the significant factors affecting the patency of target lesions. ConclusionPaclitaxel DCBs in the treatment of femoral artery with TASC grades C/D lesions can achieve relatively satisfactory mid-term clinical safety and efficacy results, provided there is an acceptable result on completion angiogram.