Giant negative U waves during acute myocardial infarction and ischemia.
Giant negative U waves transiently appeared in a patient with acute myocardial infarction (AMI). During hospitalization, these giant negative U waves (0.3-0.5 mV) were observed in leads V2 through V4 of the electrocardiogram (ECG). The waves disappeared 10 days after hospitalization, but reappeared during a treadmill exercise test 3 weeks after the onset of AMI. The same waves were detected again when the patient was admitted for angina pectoris 3 months later. Since these giant negative U waves appeared concomitant with myocardial ischemia, ischemia seems to be their cause. To our knowledge, there are no previous reports on reproducible U waves like those seen in this patient.
Yamaguchi
T
T
Second Department of Internal Medicine, Kyorin University School of Medicine, Tokyo, Japan.
Yotsukura
M
M
Kabasawa
S
S
Ishikawa
K
K
D000368:Aged; D000369:Aged, 80 and over; D000787:Angina Pectoris / Q000175:diagnosis / Q000503:physiopathology*; D004562:Electrocardiography; D005080:Exercise Test; D006760:Hospitalization; D006801:Humans; D008297:Male; D009203:Myocardial Infarction / Q000175:diagnosis / Q000503:physiopathology*; D017202:Myocardial Ischemia / Q000175:diagnosis / Q000503:physiopathology