Abstract
Two hundred consecutive coronary arteries in 157 patients undergoing angioplasty were randomized to fast or slow balloon deflation. Angioplasty was successful in 188 cases (101 with slow and 87 with fast deflation). There was no significant difference between the 2 groups with regard to the total number of dissections, although there was a greater number in the slow deflation group, and no difference in the number of minor dissections (National Heart, Lung, and Blood Institute types A and B). There was a significantly greater number of more severe dissections (types C to F) in the slow deflation group (20 vs 5; p = 0.013). It is proposed that the greater number of severe dissections is due to either increased turbulence or movement of the partially deflated balloon during slow deflation. Thus, slow balloon deflation during coronary angioplasty is associated with a higher complication rate than is conventional rapid deflation.
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