Long-term outcomes of minor plaque prolapsed within stents documented withintravascular ultrasound

The direct relationship between minor plaque prolapsed within stents and la te in-stent restenosis is unknown, Therefore, we evaluated the impact of mi nor plaque prolapse on late angiographic in-stent restenosis. Intravascular ultrasonography (IVUS)-guided single-coronary stenting was successfully pe rformed on 384 consecutive patients with 407 native coronary lesions. Six-m onth follow-up angiographic evaluation was performed on 315 patients (82.0% ) with 334 lesions (82.1%), Minor plaque prolapsed within the stent was fou nd in 75 of 334 lesions (22.5%). Results were evaluated using angiographic and IVUS methods. The development of minor plaque prolapse was significantl y associated with infarct-related artery (P = 0.000) and small pre-interven tion minimal lumen diameter (P = 0.001), The overall angiographic restenosi s rate was 23.1% (77/334)-21.3% (16/75) in the lesions with plaque prolapse vs. 23.6% (61/259) in the lesions without plaque prolapse (P = 0.806). In conclusion, minor plaque prolapsed within stents might not be associated wi th late angiographic in-stent restenosis. Cathet, Cardiovasc. Intervent. 51 : 22-26, 2000. (C) 2000 Wiley-Liss, Inc.