title: Phase-3 and phase-4 intermittent left bundle branch block occurring spontaneously in a dog.
mesh_terms: D000818:Animals; D002037:Bundle-Branch Block / Q000503:physiopathology*; D004285:Dogs; D004558:Electric Stimulation; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D008297:Male; D008564:Membrane Potentials; D014630:Vagus Nerve / Q000503:physiopathology