JAPANESE CIRCULATION JOURNAL
Online ISSN : 1347-4839
Print ISSN : 0047-1828
ISSN-L : 0047-1828
SIGNIFICANCE OF Q WAVE DISAPPEARANCE IN THE CHRONIC PHASE FOLLOWING TRANSMURAL ACUTE MYOCARDIAL INFARCTION
MITSUTAKA YASUDAHIDETAKA IIDAHIROSHI ITAGANEAKIRA TAHARAIKU TODAKANAME AKIOKAMASAKAZU TERAGAKIHISAO OKUKAZUHIDE TAKEUCHITADANAO TAKEDAHIROYUKI YAMAGISHITAKAHIKO NARUKOYOSHIYASU IKUNO
Author information
JOURNAL FREE ACCESS

1990 Volume 54 Issue 12 Pages 1517-1524

Details
Abstract

The mechanism and prognostic implications of Q wave regression following transmural acute myocardial infarction (AMI) were assessed in 54 patients. Of these subjects, 14 lost their Q waves. Exercise myocardial thallium-201 (201Tl) scintigraphy and two-dimensional echocardiography were performed before the patients were discharged from hospital. Two-dimensional echocardiography and electrocardiography were simultaneously repeated about 18 months after AMI. Both the relative 201Tl activity in the infarcted area and the improvement of echocardiographic wall motion index were higher in patients who had lost their Q waves than in those with retained Q waves (70±14% vs 58±13%, p<0.01; 5.2±3.0 vs 2.0±3.4, p<0.01. respectively). The prevalence of post-infarction angina pectoris was significantly higher in the former (29% vs 0%, p<0.01). We concluded that remnants of viable myocardial muscle might be responsible for Q wave regression following transmural acute myocardial infarction, and the prevalence of post-infarction angina pectoris was high among these patients.

Content from these authors
© Japanese Circulation Society
Previous article Next article
feedback
Top