PMID: 8865222Aug 1, 1996Paper

A comparative analysis of signal processing methods for motion-based rate responsive pacing

Pacing and Clinical Electrophysiology : PACE
S E GreenhutC P Lau


Pacemakers that augment heart rate (HR) by sensing body motion have been the most frequently prescribed rate responsive pacemakers. Many comparisons between motion-based rate responsive pacemaker models have been published. However, conclusions regarding specific signal processing methods used for rate response (e.g., filters and algorithms) can be affected by device-specific features. To objectively compare commonly used motion sensing filters and algorithms, acceleration and ECG signals were recorded from 16 normal subjects performing exercise and daily living activities. Acceleration signals were filtered (1-4 or 15-Hz band-pass), then processed using threshold crossing (TC) or integration (IN) algorithms creating four filter/algorithm combinations. Data were converted to an acceleration indicated rate and compared to intrinsic HR using root mean square difference (RMSd) and signed RMSd. Overall, the filters and algorithms performed similarly for most activities. The only differences between filters were for walking at an increasing grade (1-4 Hz superior to 15-Hz) and for rocking in a chair (15-Hz superior to 1-4 Hz). The only differences between algorithms were for bicycling (TC superior to IN), walking at an increasing gr...Continue Reading


Nov 1, 1992·Pacing and Clinical Electrophysiology : PACE·J ZarlingJ Sieckhaus
Feb 1, 1992·Pacing and Clinical Electrophysiology : PACE·D W BacharachJ M Kelly
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Jan 1, 1987·Pacing and Clinical Electrophysiology : PACE·P J MouraD P Morse
Feb 1, 1988·Pacing and Clinical Electrophysiology : PACE·C P LauA J Camm
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Sep 1, 1993·Pacing and Clinical Electrophysiology : PACE·D T Connelly
May 25, 1960·Acta Physiologica Scandinavica·R W BLOUNT, B H LEVEDAHL

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Mar 10, 2000·Cardiology Clinics·S K Leung, C P Lau

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