Spontaneous vagal mediated atypical AV nodal Wenckebach block.
D004562:Electrocardiography; D006327:Heart Block / Q000209:etiology* / Q000503:physiopathology; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D014630:Vagus Nerve / Q000503:physiopathology*