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The Journal of Thoracic and Cardiovascular Surgery, Vol 74, 586-593, Copyright © 1977 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Disappearance of electrocardiographic pattern of inferior wall myocardial infarction after aorta-coronary bypass surgery

FB Kennedy, AR Ticzon, FC Duffy, LR Raymundo and JW Giacobine

Three cases are presented showing the disappearance of electrocardiographic (ECG) evidence of old inferior wall myocardial infarction (MI) after aorta-coronary bypass surgery. Evidence is presented to suggest that the loss of Q waves may be the result of reperfusion of the ischemic myocardium (two cases) and the "cancelling effect" of a new perioperative myocardial damage upon the ECG evidence of an old myocardial infarction (one case). Q waves do not always indicate permanent myocardial scar formation; they are sometimes transient and reversible. Review of the literature provides further experimental and clinical evidences to suggest that surgical reperfusion of peri-infarction ischemic myocardium is an explanation for the ECG change. Pre- and postoperative angiographic and ventriculographic correlations are needed to further clarify the mechanism and clinical significance of such cases.


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 Eur J Cardiothorac SurgHome page
G. Crescenzi, T. Bove, F. Pappalardo, A. M. Scandroglio, G. Landoni, G. Aletti, A. Zangrillo, and O. Alfieri
Clinical significance of a new Q wave after cardiac surgery
Eur J Cardiothorac Surg, June 1, 2004; 25(6): 1001 - 1005.
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