alexa Acute myocardial infarction in pregnancy: a United States population-based study.


Journal of Addiction Research & Therapy

Author(s): James AH, Jamison MG, Biswas MS, Brancazio LR, Swamy GK,

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Abstract BACKGROUND: The purpose of this study was to determine the incidence, mortality, and risk factors for pregnancy-related acute myocardial infarction in the United States. METHODS AND RESULTS: The Nationwide Inpatient Sample for the years 2000 to 2002 was queried for all pregnancy-related discharges. A total of 859 discharges included a diagnosis of acute myocardial infarction, for a rate of 6.2 (95\% confidence interval [CI] 3.0 to 9.4) per 100,000 deliveries. Among these, there were 44 deaths, for a case fatality rate of 5.1\%. The odds of acute myocardial infarction were 30-fold higher for women aged 40 years and older than for women <20 years of age. Single independent variables that were statistically and clinically significant, including age, race, and certain medical conditions and obstetric complications, were entered into a multivariable logistic regression model. Hypertension (odds ratio [OR] 21.7, 95\% CI 6.8 to 69.1), thrombophilia (OR 25.6, 95\% CI 9.2 to 71.2), diabetes mellitus (OR 3.6, 95\% CI 1.5 to 8.3), smoking (OR 8.4, 95\% CI 5.4 to 12.9), transfusion (OR 5.1, 95\% CI 2.0 to 12.7), postpartum infection (OR 3.2, 95\% CI 1.2 to 10.1), and age 30 years and older remained as significant risk factors for pregnancy-related acute myocardial infarction. Black race was eliminated as a risk factor in the multivariable analysis, which suggests that the increased incidence among black women is explained by an increased prevalence of other cardiovascular risk factors. CONCLUSIONS: Although acute myocardial infarction is a rare event in women of reproductive age, pregnancy increases the risk 3- to 4-fold. Certain medical conditions and complications of pregnancy increase the risk further and are potentially modifiable risk factors. This article was published in Circulation and referenced in Journal of Addiction Research & Therapy

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