QRS Dependence of the Split Interval of the Second Heart Sound in Complete Right and Left Bundle Branch Block

In 80 cases of complete right bundle branch block and 21 cases of complete left bundle branch block, a parabolic relationship between QRS duration and the split interval of the second heart sound was established. However, the relationship was not so very close, and the exceptions mainly due to hemod...

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Bibliographic Details
Published inJapanese Heart Journal Vol. 8; no. 5; pp. 459 - 467
Main Authors SAKAMOTO, Tsuguya, UOZUMI, Zen'ichiro, KAWAI, Nobuyoshi, YAMADA, Tetsuro, INOUE, Kiyoshi, HORIKOH, Umeno, UEDA, Hideo
Format Journal Article
LanguageEnglish
Published Japan International Heart Journal Association 01.01.1967
Subjects
Adolescent
Adult
Aged
Angina Pectoris - complications
Aortic Diseases - complications
Bundle-Branch Block - complications
Carotid Arteries
Child
Electrocardiography
Female
Humans
Male
Middle Aged
Myocardial Infarction - complications
Phonocardiography
Pulse
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Summary:In 80 cases of complete right bundle branch block and 21 cases of complete left bundle branch block, a parabolic relationship between QRS duration and the split interval of the second heart sound was established. However, the relationship was not so very close, and the exceptions mainly due to hemodynamic burdens co-exist were not infrequent. Clinical significance of the relationship was discussed and the mechanism of reversed splitting of the second heart sound in complete left bundle branch block was analyzed in a case of alternating QRS duration. At least in this case, the prolongation of isometric contraction had the most important significance to the occurrence of the reversed splitting.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:0021-4868
1348-673X
DOI:10.1536/ihj.8.459