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Atrial Premature Beats with Variable Return Cycle Lengths—A Clue to Sinus Node Re‐entry?
Author(s) -
SQUIRE ANTHONY,
STERN ERIC H.,
SCHWEITZER PAUL
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.tb05342.x
Subject(s) - medicine , sinus (botany) , node (physics) , cardiology , anatomy , acoustics , physics , biology , botany , genus
A patient with alrial premature beats (APBs) with variable return cycle lengths is reported. Two rare responses of the sinus node were observed: APBs in which the return and sinus cycle lengths were equal and APBs which were interpolated. Several possible mechanisms for these unusual effects of APBs on the sinus node are discussed. One mechanism which can explain both of these observations is sinus node re‐entry. This possibilify is indirectly supported by documentation of sinus node re‐entry during electrophysiologic studies.