Angiographic and Clinical Significance of 'Transient' ST-Segment Depression in the Lateral Chest Leads in Anterior Wall Acute Myocardial Infarction
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概要
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This study aimed to clarify the signficance of ST-segment depression in the lateral chest leads in anterior wall acute myocardial infarction (AMI) with ST-segment elevation. A total of 196 patients with their first anterior wall AMI (≤6h) were divided into 2 groups according to the presence (group A, n=39) or absence (group B, n=157) of ST-segment depression ≥0.1m V in V_5 and/or V_6 on the admission electrocardiogram. Patients with electrocardiographic confounding factors were excluded. No patients had persistent ST-segment depression in the lateral chest leads. Emergency coronary angiography revealed that group A had higher incidences of occlusion of the left anterior descending coronary artery (LAD) proximal to its first sepral branch (77% vs 51%, p<0.01)and good collateral circulation than group B (46% vs 25%, p<0.05). Peak creatine kinase levels were significantly lower in group A than in group B (2060±1099 vs 2873±2077 IU/L, p<0.01). Left ventricular ejection fraction in the chronic phase was signfivantly greater in group A than in group B. Regional wall motion in the infarct region in the choronic phase was better in group A than in group B. These results indicate that patients with 'transient' ST-segment depression in the lateral chest leads in anterior wall AMI had a relatively smaller infarct size, despete their higher incidence of occlusion of the LAD proximal to its first septal branch, because of their higher incidence of good collateral circulation.
- 社団法人日本循環器学会の論文
- 1999-10-20
著者
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Watanabe Toru
Division Of Cardiovascular Medicine Oita Nakamura Hospital
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NASU Masaru
Second Depertment of Internal Medicine, Oita Medical University.
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Tamura Akira
Second Department of Internal Medicine, Oita University
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Watanabe Toru
Second Department of Internal Medicine, Oita University
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Nasu Masaru
Second Department Of Internal Medicine Oita University
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Nasu Masaru
Second Department Of Internal Medicine Department Of Infectious Diseases Faculty Of Medicine Oita Un
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Nagase Kimiaki
Second Department of Internal Medicine, Faculty of Medicine, Oita University
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Nagase Kimiaki
Second Department Of Internal Medicine Faculty Of Medicine Oita University
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Mikuriya Yoshiaki
Second Department of Internal Medicine, Oita Medical University
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Nasu Masaru
The Second Department Of Internal Medicine Oita Medical University
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Mikuriya Yoshiaki
Second Department Of Internal Medicine Oita Medical University
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Tamura Akira
Second Department Of Internal Medicine Oita Medical University
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Watanabe Toru
Second Department Of Internal Medicine Faculty Of Medicine Oita University
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Watanabe Toru
Second Department Of Internal Medicine
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Tamura Akira
Second Department Of Internal Medicine Faculty Of Medicine Oita University
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