Emergency coronary artery bypass grafting for left main shock syndrome
Hajime Osawa1, Toshihiro Fujimatsu
1Department Cardiovascular Surgery, Aizawa Hospital, Matsumoto, Nagano, Japan. oohajime@peach.ocn.ne.jp
Insights
Emergency coronary artery bypass grafting (CABG) effectively treats acute myocardial infarction (AMI) with left main coronary artery disease and cardiogenic shock. Early CABG within 8 hours improves survival in these high-risk patients.
Area of Science:
- Cardiology
- Cardiac Surgery
- Interventional Cardiology
Background:
- Left main coronary artery disease complicating acute myocardial infarction (AMI) with cardiogenic shock presents significant morbidity and mortality.
- The optimal timing for coronary artery bypass grafting (CABG) in patients with left main shock syndrome remains uncertain.
Purpose of the Study:
- To evaluate the clinical outcomes of emergency CABG in patients with AMI complicated by cardiogenic shock and left main coronary artery disease.
- To determine if early reperfusion (within 8 hours) impacts survival in left main shock syndrome.
Main Methods:
- Six patients with left main shock syndrome underwent emergency CABG.
- Patients were stratified into two groups based on time from MI to reperfusion: within 8 hours and beyond 8 hours.
- Postoperative ejection fraction (EF) and cardiac biomarkers (creatinine kinase-myosin band - CK-MB) were assessed.
Main Results:
- Significant differences in postoperative EF and CK-MB levels were observed between the early (<8 hours) and late (≥8 hours) reperfusion groups.
- The overall 30-day survival rate was 100%.
- Five patients were discharged alive, with one late mortality at 78 days post-surgery.
Conclusions:
- Emergency CABG is an effective treatment for AMI with cardiogenic shock and left main coronary artery disease, offering acceptable mortality and morbidity.
- Performing emergency CABG within 8 hours of MI onset may improve survival outcomes for patients with left main shock syndrome.
Objective:
Acute myocardial infarction (AMI) complicated by cardiogenic shock and left main coronary artery disease (left main shock syndrome) shows high morbidity, and whether early coronary artery bypass grafting (CABG) improves the clinical outcome remains unclear.
Methods:
Six consecutive patients (mean age, 61.6 years) with MI complicated by left main shock syndrome underwent emergency CABG. Patients were divided into 2 groups according to the time from MI to reperfusion; within 8 hours in 3 patients and beyond 8 hours in the remaining. Average postoperative peak creatinine kinase (CK) and creatinine kinasemyosin band (CK-MB) levels were recorded, and the ejection fraction (EF) was measured with ultrasound cardiography.
Results:
Significant differences in postoperative EF and CPK-MB were observed between the 2 groups. The 30-day survival rate was 100%. Five patients left the hospital alive, while 1 died on postoperative day 78.
Conclusions:
AMI complicated by cardiogenic shock and left main coronary artery disease can be effectively treated with emergency CABG, with acceptable mortality and morbidity. Emergency CABG for MIs within 8 hours can improve survival in patients with left main shock syndrome.
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