Abstract
In this study a group of patients undergoing directional atherectomy for localized occlusive disease in the femoropopliteal arteries, the value of intravascular ultrasonography (IVUS) to improve the efficacy of plaque removal was evaluated. The findings obtained by IVUS were correlated with intraarterial digital subtraction angiography (IA DSA) performed during the procedure. In addition, the patency rates at follow-up in patients undergoing atherectomy with and without IVUS were compared. Forty patients were treated by atherectomy because of segmental lesions of the femoropopliteal arteries causing intermittent claudication. Twenty-two patients underwent atherectomy, guided by biplane IA DSA only, and 18 patients were also studied by IVUS. The groups were divided by means of consecutive presentation, IVUS being used in the second part of the study period. The median follow up was 16 months (range, 0 to 40 months). Variables, measured by IVUS during the procedure, were the minimal transverse luminal diameter (MTLD) and the free luminal area. Patency rates at follow-up were determined by regular color flow duplex examinations. Color-flow duplex criteria for occlusions were absence of arterial flow and, for stenosis, a ratio of p...Continue Reading
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