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Activity Controlled Cardiac Pacemakers During Stairwalking: A Comparison of Accelerometer with Vibration Guided Devices and with Sinus Rate
Author(s) -
MATULA MARKUS,
SCHLEGL MICHAEL,
ALT ECKHARD
Publication year - 1996
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1996.tb03410.x
Subject(s) - stairs , accelerometer , medicine , metronome , heart rate , stair climbing , physical medicine and rehabilitation , physical therapy , blood pressure , computer science , rhythm , civil engineering , engineering , operating system
Activity controlled pacemakers are the most widely used rate adaptive systems. We studied second‐generation activity controlled systems (accelerometer) in 21 patients with such an accelerometer controlled system implanted during walking level and stairs. We compared them to the rate of vibration controlled, first‐generation activity pacemakers and to the sinus rate of a healthy control group. A metronome directed the speed during walking and climbing stairs at 92, 108, and 120 steps/min. At 92 steps/min, the new accelerometer controlled systems showed a significant (P ≤ 0.001) pacing rate increase from 107 ± 8 beats/mm during walking level to 124 ± 8 beats/min during climbing stairs, and a significant decrease to 105 ± 12 beats/mm during walking downstairs. In contrast, first‐generation activity controlled pacemakers showed a less physiological rate behavior with higher pacing rate (113 ± 7 beats/min) walking downstairs than walking upstairs (97 ± 9), For everyday activities at normal walking speed, accelerometer controlled pacemakers show a more physiological rate behavior than first‐generation pacemakers, hut they lose this physiological response with faster walking.