| Exercise-induced ST-segment elevation--role of left ventricular wall motion abnormalities and coronary artery narrowing. | |
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MedLine Citation:
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PMID: 8747762 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We studied the causes of exercise-induced ST-segment elevation. Group I consisted of 15 patients with anterior myocardial infarction in the absence of a coronary artery luminal narrowing of 75% or more. Group II consisted of 36 patients with predominantly exertional angina and a luminal narrowing of 90% or more in the left anterior descending coronary artery in the absence of previous myocardial infarction. In group I, exercise-induced ST-segment elevation occurred frequently during treadmill exercise (15/15, 100%). None of the patients showed 201Tl redistribution. The standard deviation of the phase in radionuclide ventriculography increased during bicycle exercise. Of group II patients, only those with 99% narrowing and poor collaterals showed exercise-induced ST-segment elevation (13/14, 93%), whereas none of those with complete occlusion or 99% narrowing and good collaterals, or 90% narrowing showed ST-segment elevation. In group II, patients with exercise-induced ST-segment elevation showed lower 201Tl uptake during exercise and washout in the territory of the diseased vessel than those without exercise-induced ST-segment elevation. In conclusion, wall motion abnormalities may cause exercise-induced ST-segment elevation independently of myocardial ischemia. In patients with predominantly exertional angina, exercise-induced ST-segment elevation may be a marker for 99% narrowing with poor collaterals and severe myocardial ischemia. |
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Authors:
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H Miyakoda; M Kato; N Noguchi; H Omodani; S Osaki; T Matsumoto; T Kinugawa; A Hoshio; H Kotake; H Mashiba |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Japanese circulation journal Volume: 59 ISSN: 0047-1828 ISO Abbreviation: Jpn. Circ. J. Publication Date: 1995 Nov |
Date Detail:
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Created Date: 1996-09-23 Completed Date: 1996-09-23 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 7806868 Medline TA: Jpn Circ J Country: JAPAN |
Other Details:
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Languages: eng Pagination: 725-35 Citation Subset: IM |
Affiliation:
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First Department of Internal Medicine, Tottori University School of Medicine, Yonago, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Collateral Circulation Constriction, Pathologic / diagnosis, physiopathology Coronary Circulation Coronary Disease / diagnosis*, physiopathology Electrocardiography* Exercise Test Female Gated Blood-Pool Imaging Heart / radionuclide imaging Humans Male Middle Aged Myocardial Contraction* Myocardial Infarction / diagnosis, physiopathology Retrospective Studies Thallium Radioisotopes / diagnostic use Ventricular Function, Left* |
| Chemical | |
Reg. No./Substance:
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0/Thallium Radioisotopes |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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