Abstract
Several studies have found an increased risk of myocardial infarction among depressed patients. Selective serotonin reuptake inhibitors (SSRIs) appear to lack the arrhythmic adverse effects of tricyclic antidepressants, and are thought to inhibit platelet aggregation. We examined whether use of different antidepressant classes is associated with a lower risk of first-time hospitalization for myocardial infarction, as compared with nonuse. We identified 8887 cases of first-time hospitalization for myocardial infarction and 88,862 age- and sex-matched population-based controls during 1994-2002, using data from North Jutland County, Denmark. Cases and controls were stratified according to history of cardiovascular disease. All prescriptions for antidepressants before hospitalization for myocardial infarction were identified using a prescription database. Conditional logistic regression was used to estimate odds ratios of myocardial infarction associated with antidepressant use, adjusted for possible confounding factors. In patients with a history of cardiovascular disease, we found indications of a lower risk of myocardial infarction among those who used SSRIs (adjusted odds ratio [OR] = 0.85; 95% confidence interval [CI]: 0.62 to 1.16), nonselective serotonin reuptake inhibitors (adjusted OR = 0.83; 95% CI: 0.50 to 1.38), and other antidepressants (adjusted OR = 0.55; 95% CI: 0.31 to 0.97). There were no such associations among persons without a history of cardiovascular disease. Antidepressant use may be associated with a decreased risk of hospitalization for myocardial infarction among persons with a history of cardiovascular disease, although it remains uncertain whether there are differences by class of antidepressant.
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