Value of lead aVR in the detection of significant left main coronary artery stenosis in acute coronary syndrome.

医学 内科学 心脏病学 急性冠脉综合征 铅(地质) 胸痛 冠状动脉疾病 ST段 ST高程 狭窄 心电图 动脉 心肌梗塞 地貌学 地质学
作者
Paweł Rostoff,W Piwowarska,Ewa Konduracka,Anna Libionka,Marzena Bobrowska-Juszczuk,Katarzyna Stopyra,Andrzej Gackowski,Aleksander Kubinyi,Bohdan Nessler,D. Mroczek‐Czernecka
出处
期刊:PubMed 卷期号:62 (2): 128-7 被引量:31
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Electrocardiographic lead aVR is usually ignored in patients with chest pain. ST segment elevation in aVR may have diagnostic value in patients with acute coronary syndrome (ACS) and significant stenosis or obstruction of the left main coronary artery (LMCAS), especially when accompanied by ST segment elevation in lead V(1).To asses the value of lead aVR and V1 for the detection of LMCAS in patients with ACS.The study group consisted of 150 patients (mean age 60.6+/-9.5 years, range 33-78 years) with ACS, including 46 with LMCAS and 104 without LMCAS. ECG recordings obtained on admission were compared between these two groups.In patients with LMCAS, ST segment elevation in lead aVR was two times more frequent than in remaining patients (69.6% vs 34.6% p=0.0001) whereas there were no differences in lead V(1). Sensitivity of ST elevation in aVR in detection of LMCAS was 69.6%, specificity - 65.4%, positive predictive value - 47.1%, and negative predictive value - 82.9%. In patients with LMCAS, ST segment depression was significantly more often present in ECG leads other than aVR (45.6% vs 23.1% p<0.01). Patients with LMCAS more often had hypertension (95.6% vs 77.9% p<0.05) and three-vessel disease (78.3% vs 31.8%, p<0.0001).The assessment of lead aVR in patients with ACS may indicate LMCAS. Additional analysis of lead V(1) does not improve diagnostic accuracy.

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