title: Atrial repolarization: its role in ST elevation.
abstract: In four patients, ectopic supraventricular rhythm (or beats) with cephalad anomalous atrial activation and, generally, a short PR, were always associated with an ST elevation in the leads with a negative P wave. An inverted Ta wave appears to be responsible for the ST elevation.
mesh_terms: D000328:Adult; D001283:Atrioventricular Node / Q000503:physiopathology*; D005117:Cardiac Complexes, Premature / Q000503:physiopathology*; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged