Output Programming
Providing auto capture algorithms are functioning well, auto capture should be ON.
•Saves battery, some algorithms safer for dependent patients (e.g., BSc/BTK/SJM)
•Reconsider if pt is symptomatic *nocturnal testing
Otherwise output margins should be at least double (2x) the threshold for RA & RV
•RA minimum 1.5V
•RV minimum 2.0V
•LV often only +0.5V safety
Output Settings & Longevity
2 major settings affect battery longevity
•Pulse amplitude
•Pulse width
Energy Formula
Energy example
Energy example
Charge Formula
Charge example
Battery Life Formula
Battery life example
Power Formula
Power example
Longevity limitations
•Once pulse amplitude >2.5V, a voltage doubler may be utilized in the device circuitry & can have a larger effect on the battery lifespan
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•Furthermore, when pulse amplitude is >5.0V, a voltage tripler may be utilized in the device circuity & can have an even further longevity impact.
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Adjusting pulse widths may be a consideration to keep the output below the voltage doubler/tripler threshold