Aortocoronary Bypass Surgery in Patients with Recurrent Post-Coronary Stenting Angina

Background. A wide adoption of percutaneous coronary operations has led to an average one-third reduction in the aortocoronary bypass surgery (ACB) rate and altering of the ACB patient profile to mainly represent advanced occlusive coronary atherosclerosis.

Materials and methods. The study analyses treatment outcomes in coronary heart disease patients with recurrent angina after a previous endovascular intervention. Over years 2009–2015, 1,023 ACB operations were performed at the Almetyevsk — OAO Tatneft Medical Unit cardiac surgery rooms. Pre-surgery coronary artery stenting (CAS) was rendered at various terms in 96 patients (23 % women, 76 % men; cohort 1). The main cohort (n = 96) was divided into 2 subgroups: IA (n = 64), single CAS; IB (n = 32), multiple CAS patients. For statistical significance, cohort 2 (control) comprised 185 patients (21 % women, 79 % men) to include every 5th history of the remaining 927 patients operated within same period.

Results and discussion. The mean aortic occlusion time was shorter in multiple CAS patients vs. other cohorts (61.3 ± 31.2 vs. 72.5 ± 27.8 and 70.7 ± 41.2 min). Cohort 1 had an overall higher emergency resternotomy rate due to ongoing bleeding (7.4 and 8.3 vs. 2.0 %). Furthermore, pre-surgery multiple CAS patients more likely faced the complications of perioperative MI (8.5 vs. 3.1 and 1.4 %) and acute postoperative heart failure (7.2 vs. 2.3 and 1.4 %, p < 0.01). This cohort often required inotropic support (9.3 vs. 3.8 and 2.1 %).

Conclusion. Statistical analysis revealed a significantly higher complication and mortality rate in patients with previous coronary stenting compared to ACB patients. Adverse ACB outcomes were observed with multiple-coronary stenting cases, in contrast to the cohort with no pre-surgery interventions.

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