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1 . 2024

Emergency repeat myocardial revascularization after coronary artery bypass grafting

Abstract

Background. Perioperative myocardial infarction associated with acute dysfunction of coronary artery bypass grafts in the early postoperative period is one of the most severe complications of coronary artery bypass grafting. In addition to the complex differential diagnosis, the optimal treatment strategy for this condition remains uncertain. Currently, according to most researchers, it is necessary to resort to the most rapid re-invasive intervention, but the preferred type of intervention remains unclear.

Aim. Conducting a comparative analysis of in-hospital and long-term mortality in patients after elective coronary artery bypass grafting who underwent re-intervention surgically or using endovascular technology in the early postoperative period due to dysfunction of coronary bypass grafts.

Material and methods. Among 8801 patients who in the period from 2011 to 2021 underwent coronary artery bypass grafting 196 (2.23%) patients underwent emergency coronary artery bypass grafting at the Federal State Budgetary Institution “FTSSSH” of the Ministry of Health of the Russian Federation (Chelyabinsk). Of these, 86 (43.9%) patients underwent re-intervention due to acute dysfunction of coronary bypass grafts. Group I included 26 patients who underwent open re-intervention, group II included 60 patients who underwent endovascular correction. The primary endpoint was in-hospital mortality; the secondary endpoints were long-term mortality and adverse cardiovascular events (myocardial infarction, stroke, repeated myocardial revascularization). Communication with patients was carried out using telephone interviews.

Results. Hospital mortality in the reoperation group was 3.8%, in the endovascular treatment group 10%, no statistical differences were found (p=0.67) group I and group II, no statistically significant differences were found, 96.5±5.2 months. versus 106.5±5.8 months (log-rank test, p=0.53) and 95.9±5.4 months. versus 98±4.4 months (log-rank test, p=0.564), respectively. In a multivariate analysis, the predictors of in-hospital mortality were hemodynamically significant carotid artery stenosis (p=0.026), cardiopulmonary bypass time (p=0.036), re-exploration due to bleeding (p=0.001), and the need for hemodialysis (p<0.001).

When conducting a multivariate Cox regression analysis in patients of group II (endovascular correction), the presence of a history of stroke and AF was accompanied by an increase in the risk of long-term mortality by 18.5 and 38 times, respectively. A decrease in LV EF at the time of discharge by 1% – an increase in the risk of death by 1/0.861 times, an increase in the time to coronary angiography from the results of the first analysis for Troponin by 1.026 times, an increase in time in intensive care by 1 day by 1.071 times. In the group of patients who underwent repeated open surgery, a 1% decrease in LV EF increased the risk of outcome by 1/0.842 times (p=0.041, 95% CI 0.714–0.993).

Conclusion. Emergency coronary angiography allows to establish the causes of perioperative myocardial infarction and, if a violation of coronary blood flow is detected, it can be eliminated in a timely manner. Hospital, long-term mortality and adverse cardiovascular events were comparable between groups with different methods of repeated revascularization.

Keywords:coronary artery bypass; myocardial infarction; postoperative complications

Funding. The study had no sponsor support.

Conflict of interest. The authors declare no conflict of interest.

For citation: Semagin A.A., Aminov V.V., Lukin O P., Fokin A.A. Emergency repeat myocardial revascularization after coronary artery bypass grafting. Clinical and Experimental Surgery. Petrovsky Journal. 2024; 12 (1): 60–7. DOI: https://doi.org/10.33029/2308-1198-2024-12-1-60-67  (in Russian)

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CHIEF EDITOR
CHIEF EDITOR
Sergey L. Dzemeshkevich
MD, Professor (Moscow, Russia)

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