title: The P wave: correlation of surface and intra-atrial electrograms.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000503:physiopathology; D001282:Atrial Flutter / Q000503:physiopathology; D016275:Atrial Function; D001283:Atrioventricular Node / Q000503:physiopathology; D002036:Bundle of His / Q000503:physiopathology; D005117:Cardiac Complexes, Premature / Q000503:physiopathology; D004562:Electrocardiography / Q000145:classification*; D006325:Heart Atria / Q000503:physiopathology; D006329:Heart Conduction System / Q000503:physiopathology*; D006331:Heart Diseases / Q000503:physiopathology; D006346:Heart Septum / Q000502:physiology; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D006984:Hypertrophy / Q000503:physiopathology; D009431:Neural Conduction; D012849:Sinoatrial Node / Q000502:physiology; D013610:Tachycardia / Q000503:physiopathology