ATP efficacy
Also written as: ATP — Antitachycardia Pacing
Success rate of antitachycardia pacing in terminating ventricular tachycardia without requiring high-voltage shock therapy.
Full Definition
The percentage of ventricular tachycardia episodes that are successfully terminated by antitachycardia pacing (ATP) without progression to high-voltage defibrillation. ATP efficacy is a critical performance metric for ICDs, as successful ATP termination avoids the pain and potential complications associated with shock therapy. Efficacy rates vary based on VT cycle length, morphology, and ATP programming parameters, with typical success rates ranging from 70-90% for slower, more organized ventricular tachycardias.
Usage
Usage note: Express as percentage; distinguish from shock efficacy metrics.
In Context
- "ATP efficacy was 85% for VT episodes with cycle lengths greater than 300ms." — Clinical study results
- "The new algorithm improved ATP efficacy while reducing acceleration risk." — Product performance report