title: A balloon tipped catheter for obtaining his bundle electrograms without fluoroscopy.
mesh_terms: D006328:Cardiac Catheterization / Q000295:instrumentation*; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006330:Heart Defects, Congenital / Q000175:diagnosis* / Q000503:physiopathology; D006331:Heart Diseases / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D008722:Methods