cardioplegic arrest
Intentional cessation of cardiac electrical and mechanical activity using cardioplegic solution.
Full Definition
Cardioplegic arrest is a controlled technique used during cardiac surgery to stop the heart's electrical and mechanical activity, creating a motionless, bloodless operative field. This is achieved by infusing a specialized solution containing high concentrations of potassium, which depolarizes cardiac cell membranes and prevents further electrical conduction. The solution may be administered through the coronary circulation (antegrade) or coronary sinus (retrograde), and can be delivered at cold or warm temperatures depending on the surgical strategy.
Usage
Usage note: Distinguish from pathologic cardiac arrest; this is an intentional, reversible procedure.
In Context
- "Cardioplegic arrest was achieved within two minutes of cross-clamp application." — Operative report
- "The quality of cardioplegic arrest determines myocardial protection during surgery." — Surgical textbook