Key result
New Q waves on ECG occurred in 7.3% of patients after cardiac surgery and were associated with postoperative cardiac events only when coupled with high levels of myocardial necrosis biomarkers.
Why the study?
Does the appearance of a new Q wave on ECG after cardiac surgery predict adverse postoperative cardiac events?
Observational (n=206)
Does the appearance of a new Q wave on ECG after cardiac surgery predict adverse postoperative cardiac events?
A new Q wave after cardiac surgery is only prognostically significant for adverse cardiac events when accompanied by elevated myocardial necrosis biomarkers.
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Isolated new Q waves should not alter postoperative management; leaves open whether combined ECG-biomarker criteria improve risk stratification.
Crescenzi et al. (2004) conducted an observational in cardiac surgery (n=206). New Q waves on ECG vs. No new Q waves or isolated new Q waves was evaluated on postoperative cardiac events. New Q waves on ECG occurred in 7.3% of patients after cardiac surgery and were associated with postoperative cardiac events only when coupled with high levels of myocardial necrosis biomarkers.
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