COMPARATIVE STUDY
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
RESEARCH SUPPORT, NON-U.S. GOV'T
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Predictors and prognostic impact of recurrent myocardial infarction in patients with left ventricular dysfunction, heart failure, or both following a first myocardial infarction.

UNLABELLED: IMS: Recurrent myocardial infarction (MI) is common after a first MI and is associated with increased morbidity and mortality. Predictors and prognosis of a recurrent MI with contemporary management are not well known.

METHODS AND RESULTS: We assessed the predictors and prognostic impact of a first recurrent MI in 10,599 patients with left ventricular dysfunction, heart failure, or both following a first MI from the Valsartan in Acute Myocardial Infarction Trial (VALIANT) cohort. During a median follow-up of 27.4 months, 861 patients (9.6%) had a recurrent MI. The median time to recurrence was 136 days (quartiles 35-361 days), with a declining rate of recurrent MI within the first 3 months. The strongest predictors of recurrent MI were reduced estimated glomerular filtration rate, unstable angina, diabetes, and age. Mortality was markedly elevated (20.5%) within the first 7 days of a recurrent MI. Patients who survived 7 days after a recurrent MI continued to be at increased risk of death compared with patients without a recurrent MI and the risk of death remained elevated more than two-fold a year after the recurrent MI (adjusted hazards ratio 2.4, 95% confidence interval 1.7-3.2). One-year mortality for the entire VALIANT cohort was 10.3%, whereas 38.3% of the patients were dead 1 year after recurrent MI. Early reinfarctions (within 1 month) was associated with significantly higher 30-day mortality than later reinfarctions.

CONCLUSION: Even in the context of contemporary treatment, a recurrent MI confers a significantly increased risk of death in patients following a high-risk first MI. Strategies aimed at reducing recurrent MI will thus likely prolong survival in post-MI survivors.

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