Document Detail


Effects of percutaneous transluminal coronary angioplasty on late potentials and high frequency mid-QRS potentials.
MedLine Citation:
PMID:  7987878     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The high frequency mid-QRS potentials and late potentials are important in coronary artery disease because they are related to the extent of ischemia and prognosis. In this study, the effects of successful percutaneous transluminal coronary angioplasty (PTCA) on these potentials were evaluated. Twenty-four patients with coronary artery disease (aged 34-67 years, 5 women, 19 men) were examined. Eight of these patients had a history of myocardial infarction (4 anterior, 3 inferior, 1 anterior and inferior). Signal averaged ECG was recorded at 40- to 250-Hz frequency ranges for late potentials and 150- to 250-Hz frequency ranges for mid-QRS potentials before PTCA, and they were repeated 1 month later. The QRS duration (107.7 +/- 9.8 to 105.3 +/- 9.3 ms, p < 0.0001) root-mean-square voltage (39.4 +/- 20.1 to 47.7 +/- 22.2 microV, p < 0.00001) and low amplitude signal duration (30.7 +/- 9.9 to 27.7 +/- 9.3 ms, p < 0.001) showed significant changes in 40- to 250-Hz ranges before and after PTCA. The same results were also obtained in the 150- to 250-Hz frequency ranges: the QRS duration decreased (90.9 +/- 9.8 to 86.5 +/- 9.1 ms, p < 0.005) and the root-mean-square voltage increased (5.5 +/- 1.6 to 6.1 +/- 1.8 microV, p < 0.00001). Thus, successful PTCA causes improvement in late potential parameters, so the risk of malign arrhythmia that affects the prognosis can be reduced. Additionally, the increase in high frequency mid-QRS potentials shows the decrease in the ischemia after PTCA.
Authors:
B Berkalp; D Oral; N Caglar; K Omurlu; G Pamir; A Alpman; C Erol; C Kervancioglu; G Akgun; T Akyol
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Cardiology     Volume:  85     ISSN:  0008-6312     ISO Abbreviation:  Cardiology     Publication Date:  1994  
Date Detail:
Created Date:  1995-01-10     Completed Date:  1995-01-10     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  1266406     Medline TA:  Cardiology     Country:  SWITZERLAND    
Other Details:
Languages:  eng     Pagination:  216-21     Citation Subset:  IM    
Affiliation:
Department of Cardiology, Ankara University Faculty of Medicine, Turkey.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Angioplasty, Transluminal, Percutaneous Coronary*
Coronary Disease / physiopathology,  therapy
Electrocardiography*
Female
Humans
Male
Middle Aged

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


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