ELECTROCARDIOGRAM AND VECTORCARDIOGRAM IN ISOLATED COMPLETE RIGHT BUNDLE BRANCH BLOCK : PART I CLINICAL STUDIES
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概要
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Forty-seven subjects with isolated complete right bundle branch block (CRBBB) were analyzed electrocardiographically and vectorcardiographically utilizing the Frank lead system. Two basic electrocardiographic patterns of group A and group B, and 5 vectorcardiographic patterns of type A, type Ab and type ab belonging to group A, and type aB and type B to group B, were identified. The duration of the S wave in lead II in group A was equal to or larger than 0.08 sec, while in group B it was equal to or below 0.08 sec. In group A, the mid-tempolar portion of QRS-loop was displaced more posteriorly, superiorly and to the right than that in group B. As regards the mean electrical axis, group A is generally closer to CRBBB with left anterior hemiblock (LAH) than group B, while group B is to CRBBB with left posterior hemiblock (LPH) than group A. Fifteen (79%) of 19 subjects with hypertension and/or atherosclerosis had the type A, type Ab and type ab QRS-loop patterns, 2 subjects with variant type of angina pectoris out of 4 exceptions showing the type B QRS-loop patterns. On the other hand, 6 of 7 subjects with chronic lung disease and 10 of 21 subjects with no evidence of cardiopulmonary disease had the type aB and type B QRS-loop patterns. Fortunately, a 62-year-old man with essential hypertension and bronchial asthma was found to have intermittent group A and group B of isolated CRBBB confirmed by 12-lead electrocardiogram (ECG) and vectorcardiogram (VCG). On the basis of these findings, it is suggested that there would be some difference in propagation of the cardiac impulse, induced by disease, between group A and group B.
- 社団法人日本循環器学会の論文
- 1973-11-20
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関連論文
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- ELECTROCARDIOGRAPHIC AND VECTORCARDIOGRAPHIC STUDIES ON RIGHT BUNDLE BRANCH BLOCK : PROCEEDINGS OF THE 35TH ANNUAL MEETlNG OF THE JAPANESE CIRCULATION SOCIETY (Part III)
- ELECTROCARDIOGRAM AND VECTORCARDIOGRAM IN ISOLATED COMPLETE RIGHT BUNDLE BRANCH BLOCK : PART I CLINICAL STUDIES