cardioplegic arrest
Intentional cessation of cardiac electrical and mechanical activity using specialized solutions during surgery.
Full Definition
Cardioplegic arrest refers to the deliberate induction of cardiac standstill using cardioplegic solutions that contain high concentrations of potassium or other agents to depolarize the myocardium. This technique provides a motionless, bloodless surgical field while protecting the heart muscle from ischemic injury. The arrest is typically maintained throughout the period of aortic cross-clamping, with periodic reinfusion of cardioplegic solution to maintain protection. Different formulations include crystalloid, blood-based, and specialty solutions designed for specific patient populations or surgical requirements.
Usage
Usage note: Distinguish from spontaneous cardiac arrest, which is pathological rather than intentional.
In Context
- "Cardioplegic arrest was achieved within two minutes of cross-clamp application." — Operative timing
- "The heart remained in cardioplegic arrest throughout the 90-minute cross-clamp period." — Surgical procedure