title: Junctional echoes with slow retrograde conduction without His bundle depolarization: further evidence of reentry within the atrioventricular node.
abstract: We report a case of intranodal reentry with slow retrograde conduction and atrial echoes in the absence of His bundle activation. Echoes were related to delay in intranodal conduction. Reentry using anomalous atrioventricular connexions is impossible without ventricular activation. This observation suggests reentry within the node without participation of neighboring structures.
mesh_terms: D000368:Aged; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D001283:Atrioventricular Node / Q000503:physiopathology; D002036:Bundle of His / Q000503:physiopathology; D004558:Electric Stimulation; D004562:Electrocardiography; D004594:Electrophysiology; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D013575:Syncope / Q000209:etiology