retrograde cardioplegia
Delivery of cardioplegia through the coronary sinus rather than the aortic root.
Full Definition
Retrograde cardioplegia is a technique for delivering cardioplegic solution through the coronary sinus, allowing perfusion of the myocardium via the coronary venous system in a retrograde fashion. This approach is particularly useful when aortic regurgitation is present, the aortic root is diseased, or when antegrade delivery is inadequate. A specialized cannula is placed in the coronary sinus through the right atrium, and cardioplegia flows backward through the coronary circulation. This technique ensures uniform myocardial protection when antegrade delivery alone may be insufficient.
Usage
Usage note: Often used in conjunction with antegrade cardioplegia for comprehensive protection.
In Context
- "Retrograde cardioplegia was initiated through the coronary sinus catheter." — operative report
- "Combined antegrade and retrograde cardioplegia provided optimal myocardial protection." — perfusion note