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Exercise Induced Atrioventricular Block with Gap Phenomenon in Atrioventricular Conduction
Author(s) -
TOEDA TETSURO,
SUETAKE SHYUJI,
TSUCHIDA KEIICHI,
TAKAHASHI KAZUYOSHI,
MIIDA TSUTOMU,
ODA HIROTAKA,
HIGUMA NORIO
Publication year - 2000
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.1540-8159.2000.tb00840.x
Subject(s) - presyncope , medicine , cardiology , atrioventricular block , effective refractory period , heart block , refractory period , atrioventricular node , reentry , electrocardiography , electrical conduction system of the heart , heart rate , tachycardia , blood pressure
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.