myocardial protection
Techniques used during cardiac surgery to preserve heart muscle function while the heart is stopped and bloodless.
Full Definition
Myocardial protection encompasses the various strategies and techniques employed during cardiac surgery to preserve myocardial viability and function during periods of cardioplegic arrest. This includes the delivery of cardioplegia solutions (blood or crystalloid-based), maintenance of appropriate myocardial temperature (hypothermia), topical cooling, and timing of cardioplegia administration. Effective myocardial protection minimizes ischemic injury, preserves cellular integrity, and ensures optimal postoperative cardiac function. Modern techniques may include retrograde cardioplegia delivery, substrate enhancement, and pH management protocols.
Usage
Usage note: Often used interchangeably with cardioplegia strategy, though myocardial protection is the broader concept.
In Context
- "The surgical team employed antegrade and retrograde myocardial protection throughout the complex valve repair." — Operative technique description
- "Excellent myocardial protection was evidenced by immediate return of normal cardiac rhythm upon reperfusion." — Postoperative assessment