myocardial protection
Strategies and techniques used during cardiac surgery to minimize heart muscle damage during periods of ischemia.
Full Definition
Myocardial protection encompasses various methods employed during cardiac surgery to preserve heart muscle viability when the heart is stopped for surgical repair. The primary technique involves cardioplegia, where a specialized solution is infused into the coronary arteries to arrest the heart in diastole and provide metabolic support. Additional protective measures include systemic and topical hypothermia, which reduces cellular metabolic demands, and careful timing of aortic cross-clamping to minimize ischemic time. Modern protocols may incorporate blood cardioplegia, cold crystalloid solutions, or del Nido cardioplegia, each with specific advantages for different patient populations and procedures.
Usage
Usage note: Often used interchangeably with cardioprotection, but myocardial protection is more specific to surgical contexts.
In Context
- "The myocardial protection strategy included antegrade and retrograde cardioplegia delivery every 20 minutes." — operative report
- "Excellent myocardial protection was achieved with minimal troponin elevation postoperatively." — surgical summary