Outcomes of rotational atherectomy in complex lesions of the superficial femoral artery

Abstract

BackgroundThe effectiveness of rotational atherectomy in the treatment of complex superficial femoral artery (SFA) lesions remains poorly defined. Outcomes of SFA lesions treated with rotational atherectomy were analyzed. MethodsThis retrospective review assessed all patients who underwent rotational atherectomy of the SFA at a single institution between 2015 and 2018. The data of all patients were deidentified, and the study was approved by the Institutional Review Board. Informed consent was not obtained for this retrospective analysis. Main outcomes were Kaplan-Meier primary patency rate, freedom from major amputation, and 2-year survival rate. The effect of drug-coated balloon angioplasty (DCBA) on patency and time to death was investigated with univariate regression. The safety profile for atherectomy and DCBA was assessed by the 30-day incidence of major amputation and all-cause mortality. ResultsFifty-three patients (mean age, 70.2 ± 9.8 years; 73% male; 65% critical limb-threatening ischemia; 47 [90%] current or former smokers; seven [13%] with prior failed ipsilateral endovascular intervention) underwent rotational atherectomy (Jetstream; Boston Scientific, Marlborough, Mass) with mean follow-up of 543 days. Forty-six (87%) patients underwent DCBA (Lutonix; BD Bard, Covington, Ga) after atherectomy. Mean lesion length was 13.2 ± 9.0 cm. Thirty-one (58%) lesions were TransAtlantic Inter-Society Consensus C or D class. At 1-month follow-up, 39 of 45 (87%) patients experienced improvement in symptoms and Rutherford class. An improvement in ankle-brachial index was also noted in 13% of patients without improvement of symptoms, with no patients progressing to surgical bypass or major amputation. Mean ankle-brachial index increased from 0.54 ± 0.035 to 0.90 ± 0.031 at 1 month after intervention (P < .001) and remained constant out to 18 months. Mean toe pressure increased from 36 ± 3.8 mm Hg to 67 ± 4.5 mm Hg at 1 month after intervention (P < .001) and remained constant out to 18 months. Kaplan-Meier primary patency rate was 75% (95% confidence interval, 61%-85%) at 12 months and 65% (51%-77%) at 24 months. There was a trend toward improved primary patency after adjunctive DCBA compared with plain balloon angioplasty at 1 year (75% vs 43%; P = .1082). There was no significant difference in mortality between adjunctive DCBA and plain balloon angioplasty at 2 years (11% vs 0%). The 2-year incidence of major amputation in critical limb-threatening ischemia patients was 3.9% (1.2%-6.5%). One patient died and none underwent amputation within 30 days. ConclusionsRotational atherectomy with adjunctive DCBA of long SFA lesions has excellent long-term patency. Two-year major amputation and mortality rates are low, and the technique has an exceptional safety profile.