Advanced atrioventricular block induced by obstructive sleep apnea before oxygen desaturation.
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.
Maeno
Ken-ichi
K
Division of Cardiology, Yamada Red Cross Hospital, Mie, Japan. maeken@zk9.so-net.ne.jp
Kasai
Atsunobu
A
Setsuda
Morimichi
M
Nishiyama
Atsushi
A
Sakabe
Shigetoshi
S
Ohnishi
Takahiro
T
Saito
Kimimasa
K
Nishikawa
Hideo
H
D054537:Atrioventricular Block / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012720:Severity of Illness Index; D020181:Sleep Apnea, Obstructive / Q000150:complications*