Document Detail

Role of the septal leaflet in tricuspid valve closure. Consideration for treatment of complete atrioventricular canal.
MedLine Citation:
PMID:  1434697     Owner:  NLM     Status:  MEDLINE    
A septal leaflet of the tricuspid valve is thought to work differently from other anterior and posterior leaflets. We studied its role in valve closure in dogs by means of a dynamic area meter. During the control state, the tricuspid valve orifice area increased twice in diastole coincidentally with either atrial systole or rapid ventricular filling. We observed several findings after the septal leaflet resection: (1) two peak area patterns of the tricuspid valve orifice in diastole, (2) no elevation of right atrial pressure on ventricular systole (there was no V wave), (3) no tricuspid valve regurgitation on right ventriculography. These findings suggest that a complete valve closure occurred without the septal leaflet in regular sinus rhythm. An elevation of the right ventricular pressure produced by pulmonary artery stenosis without septal leaflet, however, easily caused tricuspid valve regurgitation in contrast to the same pressure of the right ventricle with the normal tricuspid valve. The right ventricular pacing caused severe valve regurgitation without the septal leaflet. Results indicate that in the repair of the complete atrioventricular canal defect and other tricuspid valve lesions, the septal leaflet of the tricuspid valve rarely requires attention. An atrioventricular block should be avoided, however, because electrical cardiac pacing on the right ventricle causes severe valve regurgitation without the septal leaflet.
M Higashidate; K Tamiya; H Kurosawa; Y Imai
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of thoracic and cardiovascular surgery     Volume:  104     ISSN:  0022-5223     ISO Abbreviation:  J. Thorac. Cardiovasc. Surg.     Publication Date:  1992 Nov 
Date Detail:
Created Date:  1992-12-11     Completed Date:  1992-12-11     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0376343     Medline TA:  J Thorac Cardiovasc Surg     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1212-7     Citation Subset:  AIM; IM    
Department of Pediatric Cardiovascular Surgery, Heart Institute of Japan, Tokyo Women's Medical College.
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MeSH Terms
Blood Pressure
Myocardial Contraction / physiology*
Pulmonary Artery / abnormalities
Tricuspid Valve / anatomy & histology,  physiology*,  physiopathology
Tricuspid Valve Insufficiency / pathology,  physiopathology
Ventriculography, First-Pass

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