Document Detail


Isolated cleft posterior mitral valve leaflet: an uncommon cause of mitral regurgitation.
MedLine Citation:
PMID:  18664488     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A 53-year-old woman with a history of hypertension was referred for an echocardiogram by her primary care physician after an unspecified abnormal ECG. The echocardiogram showed normal left ventricular size and function; however, an isolated cleft posterior mitral valve leaflet was identified with concomitant bileaflet prolapse and mild mitral regurgitation. She was subsequently referred to a cardiologist for clinical evaluation. Cleft mitral valve leaflet (CMVL) is an uncommon congenital cause of mitral regurgitation. Clefts, defined as slit-like holes or defects, are hypothesized to be a result of incomplete expression of an endocardial cushion defect which most commonly involves the anterior mitral valve leaflet with a paediatric incidence of 1:1340. Clefts affecting only the posterior mitral valve leaflet are extremely rare with only four cases being reported in the medical literature. Important co-existing anomalies with either posterior and/or anterior CMVL include counterclockwise rotation of the papillary muscles, the presence of an accessory papillary muscle or mitral valve leaflet, atrial septal defects, and mitral valve prolapse. Regurgitation from CMVL can lead to important physiological and anatomical changes within the cardiac system. Regurgitation results from blood flow directly through the cleft itself or from malcoaptation from accessory chordae with or without papillary muscle distortion. Significant chronic mitral regurgitation elevates left atrial filling pressures and leads to chamber enlargement and eccentric left ventricular hypertrophy. Early detection through two-dimensional echocardiography can provide accurate anatomical images of the various mitral valve structures and identify associated congenital anomalies. Early surgical correction is preferred before mitral regurgitation causes unfavourable remodelling. Most mitral valve cleft defects can easily be repaired by suturing the edges of the cleft. If a cleft resection leads to limited residual valve tissue, the leaflet of the mitral valve can be reconstructed using an autologous pericardial patch pre-treated with buffered glutaraldehyde. Posterior CMVL is an uncommon but clinically important cause of mitral insufficiency. Early recognition of this rare clinical entity and possible co-existent anomalies can identify the patients who would benefit from surgical intervention before compensatory left ventricular remodelling and contractile dysfunction develop.
Authors:
Anish Amin; Michael Davis; Alex Auseon
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Publication Detail:
Type:  Case Reports; Journal Article     Date:  2008-07-29
Journal Detail:
Title:  European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology     Volume:  10     ISSN:  1532-2114     ISO Abbreviation:  Eur J Echocardiogr     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2009-01-09     Completed Date:  2009-05-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100890618     Medline TA:  Eur J Echocardiogr     Country:  England    
Other Details:
Languages:  eng     Pagination:  173-4     Citation Subset:  IM    
Affiliation:
Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University College of Medicine, 473 W. 12th Avenue, Davis Heart Lung Research Institute, Suite 200, Columbus, OH 43210, USA.
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MeSH Terms
Descriptor/Qualifier:
Chordae Tendineae / abnormalities
Echocardiography, Doppler, Color
Female
Follow-Up Studies
Heart Defects, Congenital / complications*,  ultrasonography
Humans
Middle Aged
Mitral Valve / abnormalities*
Mitral Valve Insufficiency / etiology*,  physiopathology,  ultrasonography
Mitral Valve Prolapse / complications*,  ultrasonography
Observation
Rare Diseases
Risk Assessment
Severity of Illness Index

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


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