title: Exercise-induced ST segment alternans.
abstract: We report a rare electrocardiographic finding occurring in previously undescribed circumstances in which a 61-year-old man undergoing exercise testing developed striking ST segment elevation on the ECG characterized by electrical alternans of the ST segments. The significance of electrical alternans is briefly discussed in the light of this event.
mesh_terms: D005117:Cardiac Complexes, Premature / Q000175:diagnosis; D003327:Coronary Disease / Q000175:diagnosis*; D004562:Electrocardiography; D005080:Exercise Test; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion