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Emergency coronary artery bypass grafting after acute myocardial infarction. What influences early postoperative
I Yamagishi1, T Sakurada, T Abe
1Department of Cardiovascular Surgery, Akita Medical Center, 6-17 Senshu Kubotamachi, Akita 010-0874, Japan.
Insights
Emergency coronary artery bypass grafting (CABG) after acute myocardial infarction (AMI) has high hospital mortality. Increased age and cardiogenic shock predict mortality, necessitating improved hemodynamic support before surgery.
Area of Science:
- Cardiovascular Surgery
- Interventional Cardiology
Background:
- Outcomes for elective coronary artery bypass grafting (CABG) have improved.
- Emergency CABG following acute myocardial infarction (AMI) often yields suboptimal results.
Observation:
- This study analyzed 18 patients undergoing emergency CABG.
- The cohort included 16 males and 2 females, with a mean age of 65.3 years.
- Hospital mortality was 38.9%, with a 5-year survival rate of 55.6%.
Findings:
- Increased age and preoperative cardiogenic shock were significant predictors of hospital mortality.
- No significant difference in mortality was observed between using only saphenous vein (SV) grafts versus a combination of SV and internal thoracic artery (ITA) grafts.
- Preoperative cardiogenic shock was the most influential factor on hospital mortality in emergency CABG.
Implications:
- Patients undergoing emergency CABG require optimized hemodynamic status before surgery.
- Implementing appropriate circulatory support systems may improve outcomes for high-risk patients.
- Further research into strategies for managing cardiogenic shock in AMI patients undergoing CABG is warranted.
Abstract:
Although short- and long-term outcomes after elective coronary artery bypass grafting (CABG) has improved, emergency CABG after acute myocardial infarction (AMI) does not always bring satisfactory prognosis. In this report, early postoperative and follow-up results were studied. Furthermore, variables related to hospital mortality were explored. From among 186 patients who underwent CABG, 18 patients formed the basis of this research. This series included 16 males and 2 females, with a mean age of 65.3 years old. Hospital mortality of the patients was 38.9%, and actual survival rate of all the patients 5 years after CABG was 55.6%. Factors that predicted hospital mortality in those patients included increased age and preoperative cardiogenic shock. There was no difference in hospital mortality between the patients operated on with only saphenous vein (SV) and those operated on in combination with SV and internal thoracic artery (ITA). In emergency CABG, cardiogenic shock before surgery was most likely to influence hospital mortality. Therefore, an appropriate circulatory support system should be applied to improve hemodynamic status before bypass surgery.