[A study on the negative U wave in variant angina pectoris (author's transl)].
D000328:Adult; D000368:Aged; D000788:Angina Pectoris, Variant / Q000503:physiopathology*; D003329:Coronary Vasospasm / Q000503:physiopathology*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged