Background: Coronary artery bypass grafting (CABG) is recommended during acute postinfarction ventricular septal defect (PIVSD) repair, but clinical benefits of surgical revascularization in patients with subacute PIVSD have not been established. We aimed to evaluate the association of primary complete anatomic surgical myocardial revascularization (CASMR) during PIVSD and ventricular aneurysm (VA) repair on patients' short- and long-term outcomes.
Methods: This was a retrospective observational study. The inclusion criterion was PIVSD. Patients with previous CABG and those with PIVSD due to vasospasm and normal coronary arteries on angiography were excluded.
Results: From March 2002 to April 2021, 53 patients met the eligibility criteria. The median patient age was 65 years, and 28 (53%) were male. Compared to the non-CABG group, CABG patients had higher values of the median postoperative left ventricular (LV) end-diastolic volume, 100 ml, and 128.5 ml, respectively (p = .012), and the mean LV stroke volume, 49 ml, and 61 ml, respectively (p = .048). The mortality rates in the CABG and non-CABG groups were 3.6/100 person-years (95% confidence interval [CI]: 1.5-8.6/100 person-years) and 16.3/100 person-years (95% CI: 8.5-31.3/100 person-years), respectively. Cox regression adjusted for between groups imbalances demonstrated a 4-fold greater mortality risk (hazard ratio = 4.3; 95% CI: 1.1-16.7; p = .036) among the non-CABG patients than in the CABG patients. Kaplan-Meier survival analysis yielded a poorer overall survival of the non-CABG patients (p = .011).
Conclusion: Primary CASMR during PIVSD and VA repair is associated with improved postoperative cardiac function, lower hospital mortality, and better long-term survival. We recommend CASMR during PIVSD and VA repair.
Keywords: outcomes; postinfarction ventricular septal defect; surgical myocardial revascularization; survival; ventricular aneurysm repair.
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