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Clinical Experience with an Activity Sensing Pacemaker
Author(s) -
LINDEMANS FRED W.,
RANKIN IAN R.,
MURTAUGH RICHARD,
CHEVALIER PETER A.
Publication year - 1986
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.1540-8159.1986.tb06657.x
Subject(s) - medicine , treadmill , heart rate , cardiology , physical activity , anesthesia , physical therapy , blood pressure
During clinical evaluation of the Medtronic * Activitrax pacemaker in a worldwide multicenter study, implant and follow‐up data were provided by 61 investigators on 222 patients. Pacing indications included two‐ and three‐degree AV block in 149 and atrial arrhythmias in 174 patients; 16 patients received atrial pacing. Average and longest documented follow‐up periods were 7.5 and 16 months respectively. Paired treadmill tests, one in Activity mode and one in VVI/AAI mode, were performed by 120 patients. At peak exercise, average heart rate was 95 bpm in VVI/AAI mode and 118 bpm in Activity mode (p < 0.0001). Average exercise time was 9.4 minutes in VVI/AAI mode and 10.8 minutes in Activity mode (p < 0.0001). In 54 patients who exclusively had paced rhythm during both treadmill tests, average heart rates and exercise times were 70 ppm and 8.1 minutes in VVI/AAI mode and 111 ppm and 10.3 minutes in Activity mode respectively (p < 0.0001). 24‐hour Holter recordings typically demonstrated pacing at or near basic rate during periods of rest and appropriate increase in pacing rate during daily activities. Patients had significantly fewer problems with physical effort in daily life during a week of Activity mode pacing than during a week of VVI/AAI mode pacing (p < 0.05) as assessed from the symptom scores recorded by 62 patients in special diaries.