automatic capture verification
A device feature that automatically adjusts pacing output to maintain capture while optimizing battery life.
Full Definition
Automatic capture verification is an advanced pacemaker algorithm that continuously monitors cardiac capture and automatically adjusts pacing output to maintain reliable depolarization while minimizing energy consumption. The system typically works by periodically performing capture threshold tests, either through backup beats delivered at sub-threshold amplitudes or by analyzing evoked response signals. When capture is confirmed, the device may reduce output voltage, and when capture is lost, it increases output to restore reliable pacing. This feature is particularly valuable for optimizing battery longevity and adapting to changes in pacing thresholds over time due to lead maturation, medication effects, or disease progression. Some systems can perform these tests on every beat, while others perform periodic assessments.
Usage
Usage note: May be referred to as autocapture in some device models; ensure consistency within documents.
In Context
- "Automatic capture verification reduced the average pacing output from 3.5V to 2.1V while maintaining 100% capture." — Device follow-up report
- "The automatic capture verification algorithm detected rising thresholds and increased output accordingly." — Clinical monitoring system alert