Role of circumflex coronary artery involvement in non-Q wave myocardial infarction
Kalil Filho, R.; Soares, P.R.; Rochitte, C.E.; de Albuquerque, C.P.; Tranchesi Júnior, B.
Arquivos Brasileiros de Cardiologia 65(2): 125-128
1995
ISSN/ISBN: 0066-782X PMID: 8554487 Document Number: 446244
To determine the patency and incidence rates of left circumflex coronary artery (LCX) as the infarct related artery (IRA) in Q-wave and non-Q wave acute myocardial infarction (AMI). Two-hundreds and twenty one patients (172 men) with AMI were stratified in Q and non-Q waves groups. All patients were submitted to cinecoronary angiography 72 hours after the beginning of symptoms and the IRA and its patency were evaluated. In non-Q wave AMI, the LCX was considered to be the IRA in 35% of the patients. In Q wave AMI, this incidence was 8% (p < 0.001). Occlusion of LCX was seen in all non-Q wave AMI patients when it was the IRA. The incidence of LCX as IRA was significantly higher in non-Q wave AMI patients. This group did not have the previously expected greater patency rates, what could result in different clinical and evolutive characteristics.