| Ventricular relaxation and mitral opening time in various ventricular conditions of old age. | |
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MedLine Citation:
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PMID: 1218736 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This phonocardiographic-echocardiographic study was based on measurement of the interval between the aortic component of the second sound (IIA) and the peak of the E wave of the mitral echogram. The study was performed in 20 cases of left bundle branch block (LBBB), 10 cases of right bundle branch block (RBBB), 10 cases of old myocardial infarct (MI), and 10 cases of systemic hypertension (HY). All patients were above 60 years of age, and their data were compared with those of old persons without evidence of heart disease serving as controls. The IIA-E interval was found markedly prolonged in LBBB, less prolonged in MI and RBBB, and was shortened in HY. A dynamic analysis revealed that this interval results from the isovolumic relaxation period (IRP) of the left ventricle plus the "opening time" of the mitral valve. The changes observed were explained as resulting from a modification of the IRP that should be correlated with a similar modification of the isovolumic contraction time. Myocardial fibrosis would cause prolongation of IRP through structural lesions while hypertension would cause abbreviation of IRP through hormonal effects modifying both contraction and relaxation. |
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Authors:
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A A Luisada; P K Bhat; K Watanabe; D B Rao |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Gerontologia clinica Volume: 17 ISSN: 0016-8998 ISO Abbreviation: Gerontol Clin (Basel) Publication Date: 1975 |
Date Detail:
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Created Date: 1976-05-25 Completed Date: 1976-05-25 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 7601653 Medline TA: Gerontol Clin (Basel) Country: SWITZERLAND |
Other Details:
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Languages: eng Pagination: 181-90 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aged Analysis of Variance Bundle-Branch Block / physiopathology Echocardiography Female Heart Diseases / physiopathology* Humans Hypertension / physiopathology Male Mitral Valve / physiopathology* Myocardial Infarction / physiopathology Phonocardiography Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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