title: Wenckebach periods of alternate beats. Clinical and experimental observations.
mesh_terms: D000328:Adult; D000368:Aged; D000818:Animals; D002037:Bundle-Branch Block / Q000209:etiology / Q000503:physiopathology; D002675:Child, Preschool; D004285:Dogs; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000209:etiology / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D012032:Refractory Period, Electrophysiological