Document Detail

Q-wave regression unrelated to patency of infarct-related artery or left ventricular ejection fraction or volume after anterior wall acute myocardial infarction treated with or without reperfusion therapy.
MedLine Citation:
PMID:  7793396     Owner:  NLM     Status:  MEDLINE    
We examined the relation of Q-wave regression to left ventricular (LV) indexes in acute anterior wall myocardial infarction (AMI) in relation to reperfusion therapy. A total of 94 patients with their first anterior wall AMI (segment 6 or 7 occlusion according to the American Heart Association classification) were examined. The follow-up period with 12-lead electrocardiograms ranged from 6 to 60 months (mean 24 +/- 18). An abnormal Q wave was defined as > 40 ms and > 25% of the R-wave amplitude. Q-wave regression was defined as Q-wave disappearance and r-wave regression > 0.1 mV in > or = 1 lead. Contingency tables with the chi-square test and analysis of variance were used for assessment of the relation between Q-wave regression and angiographic and clinical indexes. Q-wave regression in > or = 1 lead was found in 77% of the patients. The incidence of Q-wave regression in patients with patent infarct-related artery (81%) was not significantly different from that in those with an occluded lesion (67%). Q-wave regression appeared within 1 month in 60% of patients with a patent infarct-related artery but in 25% of those with an occluded lesion. No difference in the incidence of Q-wave regression was seen between patients with lesions at segments 6 (81%) and 7 (70%), or between those with (75%) and without (77%) collateral circulation. Q-wave regression did not correlate with LV ejection fraction, LV end-diastolic or end-systolic volumes, or regional wall motion.(ABSTRACT TRUNCATED AT 250 WORDS)
K Iwasaki; S Kusachi; K Hina; S Yamasaki; T Kita; C Endo; T Tsuji
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of cardiology     Volume:  76     ISSN:  0002-9149     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  1995 Jul 
Date Detail:
Created Date:  1995-07-27     Completed Date:  1995-07-27     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  14-20     Citation Subset:  AIM; IM    
Cardiovascular Center, Sakakibara Hospital, Okayama University Medical School, Japan.
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MeSH Terms
Angioplasty, Transluminal, Percutaneous Coronary
Collateral Circulation
Coronary Circulation
Middle Aged
Myocardial Infarction / physiopathology*,  therapy*
Stroke Volume*
Thrombolytic Therapy
Urokinase-Type Plasminogen Activator / therapeutic use
Vascular Patency*
Ventricular Dysfunction, Left / physiopathology*
Reg. No./Substance:
EC Plasminogen Activator

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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