title: Advanced atrioventricular block induced by obstructive sleep apnea before oxygen desaturation.
abstract: We report a patient with transient advanced atrioventricular (AV) block induced by obstructive sleep apnea (OSA). This 54-year-old man was diagnosed as having severe OSA and AV block with ventricular asystole for more than 6 s during overnight polysomnography, which occurred just from the onset of OSA before oxygen desaturation had occurred. An electrophysiological study revealed normal AV conduction system function and normal His-Purkinje system function. The resolution of OSA with continuous positive airway pressure therapy improved the advanced AV block. Therefore, the bradyarrhythmia was determined to be an OSA-induced AV block that occurred before oxygen desaturation.
authors.affiliation: Division of Cardiology, Yamada Red Cross Hospital, Mie, Japan. maeken@zk9.so-net.ne.jp
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Maeno
authors.forename: Atsunobu
authors.initials: A
authors.lastname: Kasai
authors.forename: Morimichi
authors.initials: M
authors.lastname: Setsuda
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nishiyama
authors.forename: Shigetoshi
authors.initials: S
authors.lastname: Sakabe
authors.forename: Takahiro
authors.initials: T
authors.lastname: Ohnishi
authors.forename: Kimimasa
authors.initials: K
authors.lastname: Saito
authors.forename: Hideo
authors.initials: H
authors.lastname: Nishikawa
mesh_terms: D054537:Atrioventricular Block / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012720:Severity of Illness Index; D020181:Sleep Apnea, Obstructive / Q000150:complications*