SIGNIFICANCE OF U WAVE POLARITY IN PATIENTS WITH A PRIOR INFERIOR MYOCARDIAL INFARCTION

1990 
Sixty consecutive patients who underwent coronary angiography and left ventriculography from six to eight weeks after the onset of definite inferior myocardial infarction were divided into three groups according to the polarity of U waves in (1) leads II, III, aVF and (2) in leads V4 to V6 (positive = Group P, flat or isoelectric = Group F, and negative = Group N). The following parame ters were analyzed: (1) ECG score; (2) global ejection fraction: (3) regional area change: (4) number of asynergic, and akinetic segmental radii; (5) number of asynergic and akinetic areas: and (6) number of diseased coronary arteries and the incidence of left anterior descending artery (LAD) disease.There were no significant differences among the three groups according to the polarity of U waves in two subgroups by the site of U waves in age, gender, systemic blood pressure, and ECG scores. The polarity of U waves in leads II•III•aVF (subgroupl) correlated with the size of myocardial infarction; regional area changes in in...
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