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[Myocardial revascularization. The evolution of 100 cases]
Insights
Postoperative aorto-coronary bypass surgery patients showed myocardial infarction (MI) with CPK levels of 500 UI or more. This finding has high predictive value for diagnosing MI after bypass surgery.
Area of Science:
- Cardiovascular Surgery
- Cardiac Biomarkers
- Postoperative Complications
Context:
- Aorto-coronary bypass surgery is a critical intervention for severe coronary artery disease.
- Understanding postoperative complications, particularly myocardial infarction (MI), is vital for patient outcomes.
- This study focuses on the postoperative course of 100 patients undergoing this procedure.
Purpose:
- To investigate the incidence and diagnostic markers of postoperative myocardial infarction (MI) following aorto-coronary bypass surgery.
- To evaluate the diagnostic utility of Creatine Phosphokinase (CPK) levels in identifying perioperative MI.
Summary:
- The study analyzed 100 patients undergoing aorto-coronary bypass surgery, with a significant proportion having pre-existing conditions like myocardial infarction and symptomatic angina.
- Coronary angiography revealed extensive disease, with 73% having trivascular lesions and 8% stenosis of the left main coronary artery.
- Postoperative complications included 15 cases of acute myocardial infarction (AMI), bleeding, and cardiac failure. CPK levels of 500 UI or more demonstrated high positive (81.2%) and negative (97.6%) predictive values for AMI.
Impact:
- Elevated postoperative CPK levels (≥500 UI) can serve as a reliable diagnostic indicator for acute myocardial infarction (AMI) in patients after bypass surgery.
- This finding aids in the timely diagnosis and management of perioperative MI, potentially improving patient prognosis.
- The study highlights the importance of monitoring cardiac biomarkers in the postoperative period for early detection of ischemic events.
Abstract:
The postoperative course of 100 pts. that underwent aorto-coronary bypass surgery was studied at the Instituto Nacional de Cardiología "Ignacio Chávez": 84 were men and 16 women between 37 and 74 years. 56 had previous history of myocardial infarction, while in 16 of them occurred within 30 days of the surgical procedure. 88 had symptomatic angina and 8 were in cardiac failure. The coronariography showed trivascular lesions in 73% and 8 pts. had stenosis of the left main coronary artery. Two pts. had 5 coronary grafts, 4 had 17, 3 had 37, two 35 and one 9 pts. All anterior descending coronary arteries were grafted. 61 of them and the 8 main left damaged were grafted with internal mammary artery Afert surgery; 15 pts had AMI, 4 profuse bleeding, one cardiac failure and shock. CPK enzyme levels of 500 were found in the majority of the pts with AMI with 81.2 positive predictive value and negative of 97.6. Three pts died, two at the OR with cardiac failure one of them had ventricular rupture, and the last at the ICU also with cardiac failure. We emphasize that CPK values of 500 UI or more in the postoperative course may be diagnostic of AMI.