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Appropriate timing of surgical intervention after transmural acute myocardial infarction
Daniel C Lee1, Mehmet C Oz, Alan D Weinberg
1Department of Surgery, College of Physicians and Surgeons, Columbia University, New York City, NY 10032, USA. cd164@columbia.edu
Insights
Timing coronary revascularization after transmural myocardial infarction is crucial. Waiting at least 3 days post-infarction may reduce mortality risk, avoiding immediate surgery unless complications arise.
Area of Science:
- Cardiology
- Cardiac Surgery
- Clinical Outcomes Research
Background:
- Optimal timing for coronary revascularization after transmural acute myocardial infarction (MI) remains debated.
- Current practices vary widely, from immediate intervention to delayed repair, creating management challenges.
Purpose of the Study:
- To determine the optimal timing for coronary revascularization following transmural acute myocardial infarction.
- To analyze outcomes in a large, contemporary patient cohort.
Main Methods:
- Retrospective analysis of 32,099 patients undergoing coronary artery bypass grafting (CABG) after transmural MI.
- Data collected from 179 surgeons across 33 hospitals in New York State (1991-1996).
Main Results:
- Overall hospital mortality was 3.3%.
- Mortality significantly decreased with delayed revascularization: 14.2% ( <6 hours) to 2.7% ( >15 days).
- Revascularization within 3 days of transmural MI was independently associated with increased mortality.
Conclusions:
- Coronary revascularization within 3 days of transmural MI may increase mortality risk.
- A waiting period of at least 3 days should be considered, barring urgent indications like complications or ongoing ischemia.
Objective:
Recommended timing of coronary revascularization after transmural acute myocardial infarction ranges from immediate surgical intervention to repair 4 weeks after infarction. Such wide variation has created a dilemma in the management of these patients. The objective of this study was to delineate the optimal timing of revascularization after transmural acute myocardial infarction in a large and contemporary patient population.
Methods:
We performed a retrospective multicenter analysis of 32,099 patients who underwent coronary artery bypass grafting as the sole procedure after transmural myocardial infarction between 1991 and 1996 by 179 surgeons at 33 hospitals in New York State.
Results:
Overall hospital mortality for all patients who underwent coronary revascularization with a history of transmural myocardial infarction was 3.3%. Hospital mortality decreased with increasing time interval between revascularization and transmural acute myocardial infarction: 14.2%, 13.8%, 7.9%, 3.8%, 2.9%, and 2.7% for less than 6 hours, 6 hours to 1 day, 1 to 3 days, 4 to 7 days, 7 to 14 days, and greater than 15 days, respectively. Multivariate analyses of 43 potential risk factors suggests that revascularization within 3 days of transmural acute myocardial infarction is independently associated with mortality.
Conclusions:
Coronary revascularization within 3 days of a transmural acute myocardial infarction might be an added risk for mortality. In the absence of absolute indications for emergency surgical intervention, such as structural complications and ongoing ischemia, a 3-day waiting period before surgical revascularization should be considered.