Trends and Outcomes of Myocardial Infarction in Patients With Previous Coronary Artery Bypass Surgery

Data on myocardial infarction (MI) treatment in patients with previous coronary artery bypass grafting (CABG) is limited. We queried the Nationwide Readmissions Database to identify hospitalizations of patients with MI from 2016 to 2019. Among hospitalized patients presenting with MI, 10.3% had previous CABG. Patients with MI who had previous CABG were less likely to be revascularized than those without previous CABG for both ST-segment elevation MI (STEMI) (46.4% vs 68.4%) and non-ST-segment elevation MI (NSTEMI) (30.8% vs 36.7%). CABG was associated with a lower risk of death in NSTEMI patients (odds ratio [OR] 0.84, 95% confidence interval [CI] 0.82 to 0.86), but a higher risk in STEMI patients (OR 1.06, 95% CI 1.01 to 1.13). Revascularization was associated with a lower risk of in-hospital death in patients with previous CABG presenting with STEMI (OR 0.30, 95% CI 0.26 to 0.35) and NSTEMI (OR 0.21, 95% CI 0.19 to 0.23). (C) 2022 Elsevier Inc. All rights reserved.

Automated summary

Data on myocardial infarction treatment in patients with previous coronary artery bypass grafting is limited. Among patients hospitalized with myocardial infarction, 10.3% had previous CABG. Patients with previous CABG were less likely to receive revascularization than those without CABG, and the association between CABG and risk of death varied in STEMI and NSTEMI patients. Revascularization was associated with a lower risk of in-hospital death in patients with previous CABG presenting with both STEMI and NSTEMI.