Objectives: In 2008, the American Heart Association and the American College of Cardiology released guidelines for the management of cocaine-induced myocardial infarction (CIMI). We hypothesized that CIMI patients are likely to receive less invasive and more conservative management than patients with MI without history of cocaine use.
Methods: We conducted a retrospective analysis on patients younger than 65 years presenting with acute MI between April 1, 2008 and December 31, 2012. Patients were classified as cocaine-negative MI or CIMI based on either urine toxicology results or self-reported cocaine use. Categorical and continuous variables were compared using χ(2) or t test as appropriate. The primary outcome was cardiac catheterization or stress testing. The secondary outcome was a 30-day readmission rate for major adverse cardiovascular events. Multiple logistic regression models calculated odds ratios (ORs) for the primary outcomes adjusting for patient demographics and comorbidities.
Results: Of 378 MI patients, 4.2 % had CIMI. CIMI patients were younger (50 vs 54 years; P < 0.01) predominantly African American (56% vs 16%, P < 0.01), and mostly active smokers (88% vs 58%, P = 0.02). They were more likely to receive stress testing (adjusted OR 3.61, 95% confidence interval 1.04-12.53) and less likely to undergo cardiac catheterization (adjusted OR 0.12, 95% confidence interval 0.03-0.45). The 30-day readmission rate for major adverse cardiovascular events was higher in CIMI compared with cocaine-negative MI patients (38% vs 13%; P = 0.03).
Conclusions: The use of cocaine in patients presenting with acute MI appears to impact management decisions of providers. Patient-centered postdischarge arrangements need better coordination for this patient group to optimize their follow-up care.