Longevity decoded: Insights from power consumption analyses into device construction and their clinical implications

Pacing and Clinical Electrophysiology : PACE
Ernest W Lau

Abstract

The longevity of a cardiac implantable electronic device (CIED) depends on how quickly the powers consumed by the device's functions exhaust its usable battery energy. A mathematical model for CIED power consumptions was developed and validated against longevity data from manufacturers. The programmable parameters for the Resonate X4 cardiac resynchronization therapy defibrillators (CRT-Ds) on the Boston Scientific (St. Paul, MN, USA) online longevity calculator were designated as independent terms in the sum for the total power consumption. The reciprocal of longevity was plotted against variations in these terms. Linear and nonlinear regression analyses were used to fit the plots. The power consumed by pacing was theoretically derived and used as the calibrating tool for estimating the powers consumed by other functions and the usable battery energy. The same methodology was applied to the longevity data of other manufacturers' CRT-Ds. Single chamber 100% pacing at 60 beats/min, 2.5 V, 0.4 ms, 500 Ω consumes ≈ 144 J/year. Shock therapy is 45-85% energy efficient. Multichamber pacing modes and maintaining readiness to pace a chamber consume power even if no pacing is delivered. Switching voltage regulation is theoretically mor...Continue Reading

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Citations

Jan 3, 2021·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Robert G HauserJay D Sengupta

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