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Sensor‐Driven Rate Smoothing in a DDDR Pacemaker
Author(s) -
HIGANO STUART T.,
HAYES DAVID L.,
EISINGER GEORGE
Publication year - 1989
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.1540-8159.1989.tb05029.x
Subject(s) - smoothing , medicine , block (permutation group theory) , cardiology , computer science , mathematics , geometry , computer vision
DDD pacemakers may have large cycle‐to‐cycle variations in rate at the upper rate limit because of 2:1 block or Wenckebach‐type block. Rate smoothing was introduced as an option to eliminate these large variations. Now, DDDR pacemakers can produce similar electrocardiographic displays through a different mechanism that uses an activity sensor. This is termed “sensor‐driven rate smoothing” because it occurs only when the activity sensor is driving the pacemaker. In the case described, as the atrial rate exceeded the maximum tracking rate and reverted to Wenckebach‐type block, fhe RR interval varied onJy from 600 msec to 680 msec (13.3% rate‐smoothing value) because of sensor‐driven pacing. Maximal sensor‐driven rate smoothing requires optimal programming of the rate response indicators. This sensor‐driven rate‐smoothing effect is an electrocardiographic manifestation that will undoubtedly be seen more frequently as DDDR devices come into widespread clinical use.