Diagnostic significance for coronary artery disease of abnormal Q waves in the "lateral" electrocardiographic leads

The American Journal of Cardiology
R A WarnerH Smulyan

Abstract

To determine the diagnostic significance for coronary artery disease of abnormally large Q waves in leads I, aVL, V5 and V6--the "lateral" electrocardiographic leads--the electrocardiograms of 240 patients who had undergone cardiac catheterization were studied. First, the electrocardiograms of 99 subjects proved normal by cardiac catheterization (group 1) were studied to determine the values of the durations of Q waves in leads I, aVL, V5 and V6 that should be exceeded to be considered abnormal. These values were 30, 30, 20 and 25 ms, respectively. Then, 67 patients were identified who had abnormal Q waves in at least 1 of these leads (group 2) and 74 patients with at least 1 angiographic abnormality but without abnormal Q waves in any of these leads (group 3). Group 2 had generally more extensive left ventricular disease and a higher prevalence of anterior, inferior and apical healed myocardial infarction (MI) than group 3. However, compared with group 3, group 2 had lower prevalences of significant narrowing of the coronary arteries that supply the left ventricular lateral wall. Within group 2, abnormal Q waves in leads I and aVL (traditionally designated high lateral MI) were associated with anterior as well as apical MI, an...Continue Reading

References

Apr 1, 1978·Circulation·R E IdekerD B Hackel
Jan 1, 1984·Annual Review of Medicine·J W Kennedy, D K Stewart
Mar 1, 1983·The American Journal of Cardiology·R A WarnerH Smulyan
Jan 7, 1982·The New England Journal of Medicine·S T PalmeriG S Wagner

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Citations

Apr 1, 1989·Australian and New Zealand Journal of Medicine·G Nikolic
Mar 30, 2018·Scandinavian Cardiovascular Journal : SCJ·Xiaoming JiaYochai Birnbaum
Apr 9, 2018·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Yahya Kemal İçenMevlüt Koç

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