Is insulin an endogenous cardioprotector?

Area of Science:

• Cardiology
• Endocrinology
• Metabolic Syndrome

Background:

• Stress hyperglycemia and diabetes mellitus in myocardial infarction (MI) patients elevate risks of mortality, heart failure, and shock.
• Hyperglycemia promotes inflammation by increasing free radical and decreasing nitric oxide generation.
• Insulin offers protective effects by reducing inflammation and improving myocardial function.

Purpose of the Study:

• To investigate the critical role of glucose-insulin balance in patient recovery after acute myocardial infarction.
• To highlight the benefits of maintaining euglycemia in critically ill patients.

Main Methods:

• Review of existing literature on hyperglycemia, insulin, and myocardial infarction outcomes.
• Analysis of the pathophysiological mechanisms linking glucose metabolism to cardiac function and inflammation.

Main Results:

• Euglycemia (plasma glucose ≤ 110 mg/dl) is associated with reduced infarct size and improved cardiac function.
• Insulin therapy demonstrates anti-inflammatory properties and enhances endothelial nitric oxide production.
• Imbalances in glucose and insulin levels negatively impact recovery and increase complication risks.

Conclusions:

• Maintaining euglycemia is crucial for improving outcomes in acute myocardial infarction patients.
• Glucose-insulin-potassium (GIK) cocktails may be beneficial in managing hyperglycemia and improving cardiac function.
• Attention to glucose control is essential for reducing mortality and morbidity in critically ill cardiac patients.