Evaluating value of positive T wave in lead V1 and TV1 > TV6 pattern in predicting significant coronary artery disease in patients undergoing coronary angiography

Electrocardiograms (EcGs) were evaluated in terms of having positive T wave in lead V1 (TV1) described as T wave with amplitude of more than 0.15 mV and angiography records were assessed for presence of significant CAD defined as presence of > 70% internal diameter stenosis in at least one major epicardial coronary artery or more than 50% stenosis in left main artery (LMA). Keywords: Coronary Artery Disease; Electrocardiography; Angiography Date of submission: 04 Dec. 2019, Date of acceptance: 15 June 2020 Introduction Cardiovascular events are the most common cause of mortality among non-infectious diseases around the world and coronary artery disease (CAD) which is described as intraluminal stenosis of coronary arteries accounts for more than half of the cases.1,2 Electrocardiography (ECG) is still an important, simple, and noninvasive tool for evaluating cardiac disease including CAD. Patients with following criteria were included in the study: 1) experiencing angiography in hospital from April 2015 to January 2017, 2) having medical records in hospital, 3) aged more than 18 years, and 4) having written consent form in their medical records which allowed researchers to access and use their medical data with considering patient's privacy. According to angiography reports and ECG findings, 61.2% (n = 235) had significant CAD and 56.0% (n = 215) had positive T wave in lead V1.