Demonstration of entrance block into the atrioventricular node of man.
D006328:Cardiac Catheterization; D005117:Cardiac Complexes, Premature / Q000175:diagnosis / Q000503:physiopathology*; D004562:Electrocardiography; D006325:Heart Atria; D006327:Heart Block / Q000175:diagnosis / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans