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Although primary stenting is recommended for TASC2 B lesions of superficial femoral artery (SFA), the long-term patency is not sufficient. Since drug-coated balloon has not been approved in Japan yet, a strategy of balloon angioplasty is still often used. The aim was to evaluate the patency and the predictor of restenosis of balloon angioplasty for SFA.
Consecutive 30 SFA lesions (28 patients) underwent balloon angioplasty without stent implantation with IVUS guide were enrolled. One year restenosis rate (defined as a duplex ultrasound-derived peak systolic velocity ratio more than 2.4) was evaluated.
One year restenosis rate was 43.3%. There were no significant differences in pre-intervention IVUS findings between restenosis and non-restenosis group. The post-intervention angle of dissection was significantly greater in restenosis group (107.1 degrees vs. 51.2 degrees, p=0.03) (Table). The best cut-off value of dissection angle predicting one year restenosis was 43.5 degree (sensitivity: 84.6%, specificity: 52.9%, AUC: 0.76, p=0.02).
Acceptable one year patency rate of balloon angioplasty for SFA short lesion was observed. Extension of dissection measured by IVUS was the independent predictor of restenosis after balloon angioplasty.