Intermediate
Technical
IVT
longevity projection
Statistical estimate of expected device battery life based on current programming and usage patterns.
Full Definition
A calculated estimate of how long a cardiac device's battery will last given current pacing parameters, impedance values, and patient usage patterns. Longevity projections are typically provided during device interrogations and help clinicians plan for elective replacement timing. These projections are based on mathematical models that consider factors such as pacing percentage, lead impedance, programmed outputs, and battery chemistry characteristics.
Usage
Usage note: Distinguish from actual measured battery voltage or impedance values.
In Context
- "The longevity projection indicated 18 months remaining before elective replacement." — Device clinic report
- "Longevity projections should be documented at each follow-up visit." — Clinical protocol
Also known as
battery longevity estimate
device longevity calculation
Don't confuse with
generator longevity
battery capacity