Document Detail


Determinants of the natural course of ventricular late potentials after thrombolytic therapy for acute myocardial infarction.
MedLine Citation:
PMID:  8945067     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The intraindividual changes of ventricular late potentials and their possible determinants were examined prospectively in 88 consecutive patients (male: 75; mean age: 58 +/- 9 years) after thrombolytic therapy for acute myocardial infarction. Late potential analysis was performed 4 weeks and 12 months after acute myocardial infarction. At the same time, a left heart catheterization was performed to assess the extent of coronary heart disease and left ventricular ejection fraction. The incidence of late potential 4 weeks after acute myocardial infarction was 15% (13/88 patients). Eighteen percent (16/88) of the patients revealed changing results of late potential analysis: 9 patients lost late potential (late potential pos./neg.) 1 year after acute myocardial infarction and 7 patients presented new formation of late potential (late potential neg./pos.). Preserved late potentials were found in four patients (late potential pos./pos.). Late potential analysis remained negative in 68 patients (late potential neg./neg.). There was no influence of age, gender, site of infarction, clinical course, and medical treatment on the natural course of late potential. Changing results of late potential analysis seemed to be correlated with the evolution of left ventricular ejection fraction and the dynamics of coronary heart disease. In the group late potential pos./pos., comparable values for left ventricular ejection fraction were measured at both examinations, whereas late potential neg./neg. had a significant increase in ejection fraction. In the group late potential pos./neg., a significant improvement in left ventricular function was also measured. In contrast, the late potential neg./pos. group tended to have lower left ventricular ejection fractions 1 year after infarction. In the late potential neg./pos. and late potential pos./pos. groups, the extent of coronary artery disease returned to conditions comparable to baseline despite an initial reduction after coronary revascularization performed 4 weeks after infarction. Late potential neg./neg. and late potential pos./neg. revealed a stable benefit gained from coronary revascularization with a persistent reduction in the number of diseased vessels. Dynamic changes in the results of the signal-averaged ECG 1 year after thrombolytic therapy for acute myocardial infarction were observed in 18% of the patients. These changes seem to be correlated with the evolution of left ventricular function and the dynamics of coronary artery disease.
Authors:
J Jung; A Heisel; W Bay; R Fries; H Schieffer; C Ozbek
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Publication Detail:
Type:  Comparative Study; Journal Article; Multicenter Study    
Journal Detail:
Title:  Pacing and clinical electrophysiology : PACE     Volume:  19     ISSN:  0147-8389     ISO Abbreviation:  Pacing Clin Electrophysiol     Publication Date:  1996 Nov 
Date Detail:
Created Date:  1997-03-06     Completed Date:  1997-03-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7803944     Medline TA:  Pacing Clin Electrophysiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1909-13     Citation Subset:  IM    
Affiliation:
Medizinische Universitätsklinik, Universitätskliniken des Saarlandes, Homburg/Saar, Germany.
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MeSH Terms
Descriptor/Qualifier:
Action Potentials / drug effects*
Age Factors
Coronary Disease / diagnosis,  pathology,  physiopathology
Electrocardiography / drug effects*
Female
Fibrinolytic Agents / therapeutic use
Follow-Up Studies
Heart Catheterization
Humans
Male
Middle Aged
Myocardial Infarction / drug therapy*,  pathology
Prospective Studies
Sex Factors
Signal Processing, Computer-Assisted
Stroke Volume / drug effects
Thrombolytic Therapy*
Ventricular Function, Left / drug effects*
Chemical
Reg. No./Substance:
0/Fibrinolytic Agents

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


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