Aveir VR LP — Battery Longevity Estimate

Q: How many years of battery life are expected for an Aveir VR LP at an output of 3.0 V @ 0.4 ms, with 100% pacing at a heart rate of 50 bpm, given RV impedance = 590 Ω and a measured capture threshold of 2.75 V @ 0.5 ms?

A: Approximately ~8.4 years if 3.0 V @ 0.4 ms provides reliable capture at 50 bpm and 100% pacing with 590 Ω impedance. This estimate scales from Abbott’s reference longevity (≈10.3 years at 2.5 V @ 0.4 ms, 600 Ω, 60 bpm, 100% pacing) using the standard pacing-energy relation that varies with V² × pulse width ÷ impedance and total rate (beats/min).

Safety margin note: Your measured threshold is 2.75 V @ 0.5 ms. Shortening PW from 0.5 ms to 0.4 ms typically increases the voltage needed to maintain capture. If the clinic confirms that 3.0 V @ 0.4 ms captures with margin, use the ~8.4-year figure. If they need more amplitude and/or longer pulse width, longevity decreases as shown below.

Longevity vs. Possible Programmed Outputs (50 bpm, 590 Ω)

Programmed output	Approx. longevity
3.0 V @ 0.4 ms	~8.4 years
3.0 V @ 0.5 ms	~6.8 years
3.5 V @ 0.4 ms	~6.2 years
3.5 V @ 0.5 ms	~5.0 years

Method: scaled from the manufacturer’s published example longevity, adjusting for voltage (V²), pulse width (ms), impedance (Ω), and pacing rate (bpm). Real devices also draw housekeeping current and may run algorithms that slightly change longevity; the clinic programmer’s estimate using your exact measurements is most accurate.