The spatial ventricular gradient:  intermittent Wolff-Parkinson-White syndrome, intermittent left bundle branch block and ventricular premature contractions.
D002037:Bundle-Branch Block; D004562:Electrocardiography; D006327:Heart Block / Q000502:physiology*; D006352:Heart Ventricles; D006801:Humans; D018879:Ventricular Premature Complexes; D014927:Wolff-Parkinson-White Syndrome
ELECTROCARDIOGRAPHY; HEART BLOCK/physiology