[Alternating Wenckebach period].
D004562:Electrocardiography; D006327:Heart Block / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D013610:Tachycardia / Q000503:physiopathology*; D013614:Tachycardia, Paroxysmal / Q000503:physiopathology
Alternáló Wenckebach periódus.