Document Detail

Accuracy of low load exercise-induced T wave normalization in predicting the presence of contractile reserve after an anterior myocardial infarction.
MedLine Citation:
PMID:  11834936     Owner:  NLM     Status:  Publisher    
BACKGROUND AND METHODS. Exercise-induced T wave normalization occurring at a low (less-than-or-equal50 watt) workload in infarct-related electrocardiographic leads was studied in 30 consecutive patients with a recent transmural anterior acute myocardial infarction. Patients underwent both ergometric stress testing (within 30 days after the infarction) and low dose dobutamine echocardiography. The T wave normalization was considered significant when it occurred in at least two infarct-related leads. A significant contractile reserve was considered present in an infarcted region when 50% or more of the dyskinetic segments functionally improved on exercise during dobutamine infusion. RESULTS. Eighteen patients showed exercise-induced T wave normalization (group 1), and 12 patients did not (group 2). Myocardial contractile reserve in the infarct area was detected in 16 patients of group 1 (88%) and in 3 patients (25%) of group 2 (p=0.004). The overall sensitivity, specificity, and diagnostic accuracy of T wave normalization, as it reflects contractile reserve in the infarct area, were 84%, 82%, and 83%, respectively. CONCLUSION. Low load exercise-induced T wave normalization in infarct-related leads appears to be an accurate marker of residual contractile reserve in the infarct area in patients with recent transmural acute anterior myocardial infarction. (c) 2000 by CHF, Inc.
G Mobilia; A Donato; G Satullo; L Cavallaro; R Buchberger; R Grassi
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Publication Detail:
Journal Detail:
Title:  Preventive cardiology     Volume:  3     ISSN:  1751-7141     ISO Abbreviation:  Prev Cardiol     Publication Date:  2000  
Date Detail:
Created Date:  2002-Feb-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9813731     Medline TA:  Prev Cardiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  163-166     Citation Subset:  -    
Cardiology Department, Hospital of Montebelluna (Treviso), Italy.
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