What question did this study set out to answer?

To compare the observed clinical longevity of pacemakers against calculated longevities derived from battery characteristics and individualized programming, as well as against manufacturer projections.

October 1, 2006Pacing and Clinical ElectrophysiologyOpen Access

Pacemaker Longevity: Are We Getting What We Are Promised?

Q: What is the clinical evidence from this study?

Study design: Observational. Population: Pacemaker replacement (n=124). Intervention: Actual pacemaker longevity vs. Calculated pacemaker longevity. Primary outcome: Difference between actual and calculated pacemaker longevity (MD -491 days).

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Key result

Actual pacemaker longevity was 491+/-92 days less than calculated longevity based on battery cell characteristics and programmed parameters.

Why the study?

Does actual pacemaker longevity match calculated longevity based on battery cell characteristics and programmed parameters in patients undergoing pacemaker replacement?

Population

124 patients who had a pacemaker replaced between 1998 and 2003

Comparison

Actual pacemaker longevity tracking vs Calculated longevity based on battery cell…

Design

Cohort

Authors

JSJanek SenaratneAlberta Hospital Edmonton MIMarleen IrwinUniversity of Southern California MSManohara SenaratneUniversity of Alberta

Discussion

Member takes

Implication

Shorter-than-calculated pacemaker longevity may prompt earlier replacement planning; leaves open prospective validation of battery models and excess drain mechanisms.

Key Points

To compare the observed clinical longevity of pacemakers against calculated longevities derived from battery characteristics and individualized programming, as well as against manufacturer projections.
Reviewed clinical records of 124 patients undergoing pacemaker replacement between 1998 and 2003.
Calculated total lifetime average current drain and expected longevity using manufacturer battery cell specifications along with visit-by-visit programmed outputs, pacing mode, and percent pacing usage.
Pacemaker batteries lasted 491 ± 92 days (mean ± SEM) less than their calculated longevities.
Significant differences in longevity discrepancies were observed across different device manufacturers.
Longevity shortfalls differed between dual-chamber and single-chamber pacemakers, but the difference was not statistically significant.

Study Design

Type

Observational (n=124)

Structured PICO

Does actual pacemaker longevity match calculated longevity based on battery cell characteristics and programmed parameters in patients undergoing pacemaker replacement?

Population

124 patients who underwent pacemaker replacement between 1998 and 2003.

Exposure

Actual pacemaker longevity tracking

Comparator

Calculated longevity based on battery cell characteristics and programmed parameters, and manufacturers' projected longevities

Outcome

Difference between actual longevity and calculated longevity

Main Result

Mean Difference: -491

Actual pacemaker longevity is significantly shorter than calculated longevity, suggesting higher than expected current drain for ancillary functions or pre-implantation drain.

Cite This Study

Senaratne et al. (2006) conducted an observational in Pacemaker replacement (n=124). Actual pacemaker longevity vs. Calculated pacemaker longevity was evaluated on Difference between actual and calculated pacemaker longevity (MD -491 days). Actual pacemaker longevity was 491+/-92 days less than calculated longevity based on battery cell characteristics and programmed parameters.

synapsesocial.com/papers/6a96466ea64ccd99870e167b https://doi.org/10.1111/j.1540-8159.2006.00497.x

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Implication

Shorter-than-calculated pacemaker longevity may prompt earlier replacement planning; leaves open prospective validation of battery models and excess drain mechanisms.

Pacemaker Longevity: Are We Getting What We Are Promised?

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Cite This Study

Pacemaker Longevity: Are We Getting What We Are Promised?

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Cite This Study

Also Consider

Also Consider