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Reduction in energy pacing thresholds by overlapping biphasic stimulation versus conventional bipolar pacing
A Lazarus1, M Taskiran, P Ritter
1Association Cardiologie Val d'Or, Saint Cloud, France. Alazarusl@aol.com
Pacing and Clinical Electrophysiology : PACE
|November 24, 1998
Summary
Overlapping biphasic (OLBI) stimulation mode 8 significantly reduced acute energy pacing thresholds compared to bipolar pacing. This finding suggests OLBI pacing may enhance pacemaker longevity by lowering energy consumption.
Area of Science:
- Cardiology
- Biomedical Engineering
- Electrophysiology
Background:
- Overlapping biphasic (OLBI) stimulation is an innovative pacing waveform.
- It utilizes two simultaneous monophasic pulses with opposite polarities via a bipolar electrode.
Purpose of the Study:
- To compare acute energy pacing thresholds between bipolar and OLBI stimulation (modes 7 and 8).
- To evaluate these thresholds using conventional pacing leads at a 0.5-ms pulse duration.
Main Methods:
- Prospective study involving 31 leads in 20 patients.
- Tested acute energy pacing thresholds for bipolar, OLBI mode 7, and OLBI mode 8.
Main Results:
- OLBI mode 8 showed significantly lower energy pacing thresholds (-25.6%, P = 0.005) compared to bipolar pacing.
- OLBI mode 7 resulted in significantly higher energy pacing thresholds (+358.3%, P = 0.002).
Conclusions:
- OLBI mode 8 pacing, with bipolar leads against the myocardium, lowers acute energy pacing thresholds.
- OLBI pacing holds potential for increasing pacemaker longevity through reduced energy use.