title: Prolonged atrial conduction.
abstract: We describe a patient, in whom electrophysiologic study revealed a "negative" P-A interval in the His bundle electrogram, a prolonged intraatrial conduction time and a prolonged spike to the P wave interval during atrial pacing. The abnormalities were due to extensive sinuatrial disease.
mesh_terms: D000368:Aged; D002036:Bundle of His / Q000503:physiopathology*; D004562:Electrocardiography; D004594:Electrophysiology; D005260:Female; D006325:Heart Atria / Q000503:physiopathology; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D012804:Sick Sinus Syndrome / Q000503:physiopathology*