title: Alternating type A and type B Wolff-Parkinson-White syndrome.
mesh_terms: D006328:Cardiac Catheterization; D004562:Electrocardiography; D006329:Heart Conduction System; D006801:Humans; D008297:Male; D008875:Middle Aged; D011802:Quinidine / Q000627:therapeutic use; D014927:Wolff-Parkinson-White Syndrome / Q000188:drug therapy / Q000503:physiopathology*
chemical_list: D011802:Quinidine