Kalil Filho R, Soares P R, Rochitte C E, de Albuquerque C P, Tranchesi Júnior B
Instituto do Coração do Hospital das Clínicas-FMUSP.
Arq Bras Cardiol. 1995 Aug;65(2):125-8.
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.
确定左旋冠状动脉（LCX）作为Q波和非Q波急性心肌梗死（AMI）梗死相关动脉（IRA）的通畅率和发生率。
221例AMI患者（172例男性）被分为Q波组和非Q波组。所有患者在症状出现72小时后接受冠状动脉造影，并评估IRA及其通畅情况。
在非Q波AMI中，35%的患者LCX被认为是IRA。在Q波AMI中，这一发生率为8%（p<0.001）。当LCX是IRA时，所有非Q波AMI患者均可见LCX闭塞。
非Q波AMI患者中LCX作为IRA的发生率显著更高。该组并未出现之前预期的更高通畅率，这可能导致不同的临床和演变特征。
