[Myocardial preconditioning in anesthesia: from bench to bedside]

Area of Science:

• Cardiology and Anesthesiology
• Pharmacology

Context:

• Myocardial ischemic preconditioning offers significant protection against heart damage.
• Volatile anesthetics (sevoflurane, isoflurane) and nicorandil activate ATP-sensitive K channels (K(ATP)) to protect the myocardium.
• Diabetes and hyperglycemia can impair K(ATP) function, negating preconditioning benefits.

Purpose:

• To explore the clinical application of myocardial preconditioning in anesthesia for cardiac patients.
• To compare the cardioprotective effects of volatile anesthetics versus propofol.
• To evaluate the role of nicorandil and blood glucose control in enhancing preconditioning.

Summary:

• Volatile anesthetics demonstrate cardioprotective effects superior to propofol during operations.
• Nicorandil, a K(ATP) opener, reduces myocardial damage in specific surgical contexts.
• Maintaining K(ATP) function through blood glucose control is crucial for preserving preconditioning's protective effects.

Impact:

• Recommends volatile anesthetics over propofol for anesthesia in cardiac patients.
• Suggests perioperative nicorandil administration for patients with heart disease.
• Highlights the importance of glycemic control to sustain myocardial protection.