Con: intraoperative myocardial ischemia is not benign

Area of Science:

• Anesthesiology
• Cardiovascular Surgery
• Critical Care Medicine

Background:

• Intraoperative ischemia is consistently linked to adverse patient outcomes across various surgical settings.
• In Coronary Artery Bypass Grafting (CABG), both prebypass and postbypass ischemia are significant predictors of adverse events.
• Postbypass ischemia in CABG patients carries a substantial risk of adverse outcomes, highlighting the need for prevention strategies.

Purpose of the Study:

• To emphasize the critical importance of intraoperative ischemia as a predictor of adverse outcomes in both cardiac and non-cardiac surgery.
• To highlight the prognostic value of intraoperative ischemia monitoring.
• To advocate for increased vigilance and tailored management for patients identified with intraoperative ischemia.

Main Methods:

• The study reviews existing literature and clinical findings on intraoperative ischemia.
• Analysis of predictive values (sensitivity, positive predictive power, specificity) of intraoperative versus postoperative ischemia.
• Assessment of the clinical availability and utility of intraoperative monitoring techniques.

Main Results:

• Intraoperative ischemia is a critical predictor of adverse outcomes, with approximately one in three patients experiencing negative consequences.
• Postbypass ischemia in CABG surgery is particularly ominous, and its prevention may improve outcomes.
• While less sensitive than postoperative ischemia, intraoperative ischemia monitoring offers superior positive predictive power and specificity, and is more widely available.

Conclusions:

• Intraoperative ischemia in CABG and non-cardiac surgery is a serious sign that warrants significant concern from anesthesiologists.
• Identifying patients with intraoperative ischemia defines a high-risk group requiring specialized monitoring and treatment.
• Considering intraoperative ischemia as benign is not supported by current clinical evidence.