Unprotected left main coronary artery stenting: Immediate and medium-term outcomes of 140 elective procedures

OBJECTIVES We sought to evaluate immediate and late outcomes after stenting for left main coronary artery (LMCA) stenosis. BACKGROUND Conventional percutaneous transluminal coronary angioplasty (PTC A), for which coronary artery bypass grafting (CABG) has been the gold stan dard therapy for years, has yielded poor results in unprotected LMCA lesion s. The development of coronary stents, together with their dramatic patency improvement provided by new antiplatelet regimens and their validation aga inst restenosis, warrants a reappraisal of angioplasty in LMCA stenosis. METHODS From January 1993 to September 1998, 140 consecutive unselected pat ients with unprotected LMCA stenosis underwent elective stenting. Group I i ncluded 47 high-CABG-risk patients, and group II included 93 low-CABG-risk patients. Ticlopidine without aspirin was routinely started at least 72 h b efore the procedure and continued for one month. Patients were reevaluated monthly. A follow-up angiography was requested after six months. RESULTS The procedure success rate was 100%. One-month mortality was 9% (4/ 47) in group I and 0% in group II. A follow-up angiography nas obtained in 82% of cases, and target lesion revascularization was required in 17.4%. On e-year actuarial survival was 89% in the first 29 group I patients and 97.5 % in the first 63 group IT patients. CONCLUSIONS Stenting of unprotected LMCA stenosis provided excellent immedi ate results, particularly in good CABG candidates. Medium-term results were good, with a restenosis rate of 23%, similar to that seen after stenting a t other coronary sites. Stenting deserves to be considered a safe and effec tive alternative to CABG in institutions performing large numbers of PTCAs. (C) 2000 by the American College of Cardiology.