Clinical Experience with a New Multiprogrammable Dual Chamber Pacemaker

We evaluated the clinical performance of a new dual chamber pacemaker, ELA Chorus(tm), in 35 patients. This device incorporates linear rate adaptive AV delay (AVDR), rate smoothing, fallback, impedance telemetry, pacemaker mediated tachycardia (PMT) recognition and reprogramming software, intracardi...

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Bibliographic Details
Published in:Pacing and clinical electrophysiology 1992-11, Vol.15 (11), p.1830-1835
Main Authors: KUTALEK, STEVEN P., SCHUSTER, MELINDA M., HESSEN, SCOTT E., SHEPPARD, ROBERT, MAQUILAN, MARCH, NYDEGGER, CHARLES
Format: Article
Language:English
Subjects:
Aged
Algorithms
atrioventricular sequential
Bradycardia - therapy
Cardiac Pacing, Artificial - methods
Equipment Design
Evaluation Studies as Topic
Female
Follow-Up Studies
Heart Block - epidemiology
Heart Block - therapy
Heart Rate - physiology
Humans
Male
pacemaker
Pacemaker, Artificial
pacing
programming
Prospective Studies
Sick Sinus Syndrome - epidemiology
Sick Sinus Syndrome - therapy
Time Factors
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Summary:We evaluated the clinical performance of a new dual chamber pacemaker, ELA Chorus(tm), in 35 patients. This device incorporates linear rate adaptive AV delay (AVDR), rate smoothing, fallback, impedance telemetry, pacemaker mediated tachycardia (PMT) recognition and reprogramming software, intracardiac electrogram displays, aufothreshold testing, diagnostic data, battery depletion curves, and laptop computer programming. Mean patient age was 68 years; 18 patients had AV block, six had sinus node dysfunction (one with AV block), nine had carotid sinus hypersensitivity (three with AV block), and two had vagally mediated syncope. At hospital discharge, programming was DDD with a mean low rate of 60 (50–70) beats/min, mean high rate of 126 (120–154) beats/mm; AVDR was ON in 21 patients, rate smoothing ON in six patients, fallback ON in six patients, and PMT reprogramming algorithm ON in 27 patients, Pacemaker follow‐up involved 500 clinic visits over 14.3 months (1–36). Three patients developed atrial fibrillation, reprogrammed to DDI mode (two patients) or fallback (one patient). Fallback was used 617 times. PMT occurred 427 times in six patients; the PMT algorithm reprogrammed AV delay and postventricular atrial refractory period (PVARPJ automatically, a function unique to the Chorus(tm). Intracardiac electrograms and autothreshold testing improved follow‐up efficiency. This new dual chamber pacemaker enhances programming flexibility and improves diagnostic accuracy at follow‐up.
ISSN:0147-8389
1540-8159
DOI:10.1111/j.1540-8159.1992.tb02977.x