Prevalence and Associated Clinical Characteristics of Exercise-Induced ST-Segment Elevation in Lead aVR

• DOI: 10.1371/journal.pone.0160185
• Publication Date: 2016-07-28T13:52:37Z
• Authors: James McKinney; Ian Pitcher; Christopher B. Fo...; Masoud Yousefi; Tee Joo Yeo; Andrew Ignaszewski; Saul Isserow; Sammy Chan; Krishnan Ramanathan; Carolyn M. Taylor
• Keywords: Lead (geology); ST elevation; Bruce protocol

Exercise-induced ST-segment elevation (STE) in lead aVR may be an important indicator of prognostically coronary artery disease (CAD). However, the prevalence and associated clinical features exercise-induced STE among consecutive patients referred for exercise stress electrocardiography (ExECG) is unknown.All receiving a Bruce protocol ExECG diagnosis CAD at tertiary care academic center were included over two-year period. Clinical characteristics, including results angiography, compared between with without aVR.Among 2227 undergoing ExECG, ≥1.0mm occurred 3.4% patients. Patients had significantly lower Duke Treadmill Scores (DTS) (-0.5 vs. 7.0, p<0.01) higher frequency positive test (60.2% 7.3%, p<0.01). Furthermore, more likely to undergo subsequent cardiac catheterization than those (p<0.01, odds ratio = 4.2).Among suspected CAD, was risk DTS, increased likelihood referral angiography. These suggest that represent useful ECG feature stratification