A " l S s. MANOLIS, M.D., FACC, FESCBackground: Late potentials (LP) on signal-averaged electrocardiography (SAECG), recorded 6 to 30 days after an acute myocardial infarction (AMI), identify patients at risk for late arrhythmic events. Angiotensin-converting enzyme (ACE) inhibitors have been shown to reduce ventricular remodeling and cardiovascular mortality after AMI. Results: In the two groups of patients there were no differences in mean values of SAECG parameters. No patient was receiving any antiarrhythrmc drugs. In the captopril group LPs were present in 9 of 63 patients (14%) and in the control group in 17 of54patients(3I%)(p=O.O46).Therewasnodifference in the number of patients with a patent infarct-related artery in the two groups (76 vs. 59%).Conclusion: Captopril treatment early after an AM1 reduces the incidence of LPs recorded on Days 6-30 and may thus favorably affect the arrhythmogenic substrate.
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