battery depletion
The gradual exhaustion of a cardiac device's power source, indicated by specific voltage thresholds and device behaviors.
Full Definition
Battery depletion in cardiac devices follows a predictable pattern monitored through voltage measurements and functional indicators. Modern devices provide multiple warning stages including elective replacement indicator (ERI), end-of-service (EOS), and emergency replacement indicator. During depletion, devices typically maintain essential functions while disabling advanced features to conserve power. Battery longevity depends on device type, programmed parameters, patient physiology, and lead characteristics. Lithium-iodine batteries commonly used in pacemakers typically last 8-15 years, while ICD batteries with shock capability have shorter lifespans. Proper monitoring and timely replacement prevent sudden device failure.
Usage
Usage note: Specify the depletion stage (ERI, EOS) when documenting battery status.
In Context
- "The device reached elective replacement indicator due to normal battery depletion after twelve years." — Device follow-up report
- "Unexpected rapid battery depletion may indicate lead complications or device malfunction." — Troubleshooting guide