title: Alternation of retrograde conduction times.
abstract: A patient with idionodal rhythm with alternation of retrograde conduction times is described. The idionodal escape rhythm is associated with alternating slow and relatively fast retrograde conduction times to the atria. The mechanisms underlying this phenomenon are discussed.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000209:etiology / Q000503:physiopathology*; D002675:Child, Preschool; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male