title: AV block and pseudo sinus exit block in a patient with PSVT due to dual AV nodal pathways.
mesh_terms: D000368:Aged; D001283:Atrioventricular Node / Q000503:physiopathology*; D004562:Electrocardiography; D006327:Heart Block / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D013614:Tachycardia, Paroxysmal / Q000209:etiology* / Q000503:physiopathology