title: Effect of extrasystoles on idioventricular rhythm. Clinical and electrophysiologic correlation.
mesh_terms: D006328:Cardiac Catheterization; D005117:Cardiac Complexes, Premature / Q000503:physiopathology*; D004562:Electrocardiography; D006327:Heart Block / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008564:Membrane Potentials; D010138:Pacemaker, Artificial