Document Detail

Normalization of abnormal T waves in ischemia.
MedLine Citation:
PMID:  1267547     Owner:  NLM     Status:  MEDLINE    
Inverted T waves due to coronary artery disease and previous myocardial infarction were observed to revert ot normal, upright position during ischemia in 38 patients. The normalization of inverted T waves was seen on the electroencephalograms of 19 patients during spontaneously occurring angina pectoris and of 11 patients when ischemia was provoked by treadmill exercise; for 8 patients, normalization occurred during the administration of isoproterenol hydrochloride and during the consequent episode of angina pectoris. The mechanism for normalization may be the algebraic sum of the extent of ST segment elevation and the amplitude of the T waves of acute ischemia plus the extent of preexisting ST segment depression and the degree of T wave inversion, to result in isoelectric ST segment and upright T wave. As with myocardial infarction, reciprocal changes may also be recorded. However, the reciprocal nature may be masked since either acute ST segment elevation of T wave inversion, or both, may not be recorded in the leads reflecting the ischemic area because of normalization.
R J Noble; D A Rothbaum; S B Knoebel; P L McHenry; G J Anderson
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Archives of internal medicine     Volume:  136     ISSN:  0003-9926     ISO Abbreviation:  Arch. Intern. Med.     Publication Date:  1976 Apr 
Date Detail:
Created Date:  1976-07-06     Completed Date:  1976-07-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372440     Medline TA:  Arch Intern Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  391-5     Citation Subset:  AIM; IM    
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MeSH Terms
Acute Disease
Angina Pectoris / diagnosis
Coronary Disease / diagnosis*,  physiopathology
Exercise Test
Myocardial Infarction / diagnosis

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