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Implications of Constant‐Energy Pacing
Author(s) -
BERNSTEIN ALAN D.,
PARSONNET VICTOR
Publication year - 1983
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.1540-8159.1983.tb04463.x
Subject(s) - stimulus (psychology) , medicine , impulse (physics) , amplitude , physics , optics , cognitive psychology , psychology , quantum mechanics
Some cardiac pacemakers main tain constanl energy per stimulus by automatically increasing the stimulus duration as battery depletion causes the stimulus amplitude to decline. This feature does not guarantee an invariant capture safety margin, however, because the stimulus energy at threshold increases for stimulus durations exceeding the geometric mean of the voltage and current chronaxie times. A method is described for identifying the impulse duration at which the initial capture safety margin begins to be lost with constant‐energy pacing.