myocardial protection
Techniques used during cardiac surgery to preserve heart muscle function, including cardioplegia and hypothermia.
Full Definition
Myocardial protection encompasses various strategies employed during cardiac surgery to minimize ischemic injury to the heart muscle when circulation is interrupted. Primary techniques include cardioplegic arrest using cold, crystalloid, or blood cardioplegia solutions to stop the heart and reduce metabolic demands. Systemic hypothermia further reduces cellular metabolism and oxygen consumption. In pediatric cardiac surgery, optimal myocardial protection is crucial due to the smaller coronary reserve and longer cross-clamp times often required for complex repairs. Inadequate protection can result in postoperative ventricular dysfunction and increased morbidity.
Usage
Usage note: Encompasses both the techniques used and the goal of preserving myocardial function.
In Context
- "Excellent myocardial protection was achieved with antegrade and retrograde blood cardioplegia." — operative note
- "The prolonged cross-clamp time necessitated additional myocardial protection with repeated cardioplegia doses." — operative note