Exercise Induced Atrioventricular Block with Gap Phenomenon in Atrioventricular Conduction

A 54‐year‐old man with normal atrioventricuiar (AV) conduction at rest gave a 4‐year history of presyncope during exercise. Treadmill testing showed exercise induced AV block. Electrophysiological study demonstrated rate dependent infranodal AV block and abnormal refractory period of the His‐Purkinj...

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Bibliographic Details
Published in:Pacing and clinical electrophysiology 2000-04, Vol.23 (4), p.527-529
Main Authors: TOEDA, TETSURO, SUETAKE, SHYUJI, TSUCHIDA, KEIICHI, TAKAHASHI, KAZUYOSHI, MIIDA, TSUTOMU, ODA, HIROTAKA, HIGUMA, NORIO
Format: Article
Language:English
Subjects:
Atrioventricular Node - physiopathology
Bundle of His - physiopathology
Cardiac Pacing, Artificial
Electrocardiography
electrophysiological study
exercise induced atrioventricuiar block
Exercise Test - adverse effects
gap phenomenon
Heart Block - etiology
Heart Block - physiopathology
Heart Block - therapy
Heart Rate - physiology
Humans
infranodal block
Male
Middle Aged
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Summary:A 54‐year‐old man with normal atrioventricuiar (AV) conduction at rest gave a 4‐year history of presyncope during exercise. Treadmill testing showed exercise induced AV block. Electrophysiological study demonstrated rate dependent infranodal AV block and abnormal refractory period of the His‐Purkinje system. The gap phenomenon in AV conduction occurred during the programmed stimulation. Supernormal conduction could be considered as the mechanism of the gap phenomenon in this patient.
ISSN:0147-8389
1540-8159
DOI:10.1111/j.1540-8159.2000.tb00840.x