Document Detail


The aortomitral angle is suspended by the anterior mitral basal "stay" chords.
MedLine Citation:
PMID:  14502455     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVES: The function of the anterior mitral basal "stay" chords (SC) is not yet known. Collagen fiber orientation of the anterior mitral leaflet (AML) suggests that local stress is directed from papillary muscles (PM) over SC and AML to fibrous trigones (FT), maintaining the aortomitral angle (AMA). It has been shown that narrowing of AMA increases risk of systolic anterior movement (SAM). METHODS: Sonomicrometry crystals were implanted in six sheep at the left ventricular (LV) apex, PM tips (M1, M2), FT (T1, T2), posterior mitral annulus (PMA), and base of aortic right coronary sinus (RCS). The retracting force of ascending aorta was measured. RESULTS: Transection of SC resulted in an increase of distance M1-T1 and M2-T2. Consequently, the AMA narrowed at end systole by -3.26+/-0.85 degrees (p<0.05) and at end diastole by -4.16+/-1.28 degrees (p<0.05). A force of 1.8+/-0.2 N was needed to pull the recoiling ascending aorta back to its original position. CONCLUSIONS: The elastic recoil of ascending aorta is balanced by SC, which connect PM to FT and constitute the center of the LV base. Transection of SC narrows AMA and increases the risk of SAM.
Authors:
W A Goetz; H-S Lim; E Lansac; P A Weber; D E Birnbaum; C M G Duran
Related Documents :
21178975 - Renalase deficiency aggravates ischemic myocardial damage.
2805705 - Energy value of glucose and lactate for the myocardium in patients with mitral stenosis.
16518535 - Relief of left ventricular outflow obstruction by cibenzoline in a patient with fabry's...
10770095 - Percutaneous transvenous balloon mitral valvuloplasty: mid-term results in adolescents.
9415275 - Pharmacodynamics of basic fibroblast growth factor: route of administration determines ...
16950195 - Left ventricular function and response to enalapril in patients with duchenne muscular ...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Thoracic and cardiovascular surgeon     Volume:  51     ISSN:  0171-6425     ISO Abbreviation:  Thorac Cardiovasc Surg     Publication Date:  2003 Aug 
Date Detail:
Created Date:  2003-09-22     Completed Date:  2004-02-12     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7903387     Medline TA:  Thorac Cardiovasc Surg     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  190-5     Citation Subset:  IM    
Affiliation:
Klinik für Herz-, Thorax- und herznahe Gefässchirurgie, Klinikum der Universität Regensburg, Germany.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Aorta / anatomy & histology,  physiology*
Biomechanics
Hemodynamics
Mitral Valve / anatomy & histology,  physiology*
Myocardial Contraction
Papillary Muscles / anatomy & histology,  physiology
Sheep

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Urgent or emergent coronary revascularization using bilateral internal thoracic artery after previou...
Next Document:  Viability of the myocardium after twenty-four-hour heart conservation--a preliminary study.