Mitral regurgitation là gì

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StatPearls . Treasure Islvà (FL): StatPearls Publishing; 2021 Jan-.


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Continuing Education Activity

Mitral regurgitation (MR) is caused by the retrograde flow of blood from the left ventricle (LV) into lớn the left atrium (LA) through the mitral valve sầu (MV), causing a systolic murmur heard best at the apex of the heart with radiation to the left axilla. MR is the most comtháng valvular abnormality worldwide, affecting over 2% of the total population và has a prevalence that increases with age. This activity review the evaluation & management of mitral regurgitation & highlights the role of the healthcare team in evaluating & treating patients with this condition.

Objectives:
Identify the etiology & epidemiology of mitral regurgitation medical conditions và emergencies.
reviews the appropriate history, physical, and evaluation of mitral regurgitation.
Outline the treatment and management options available for mitral regurgitation.

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Describe interprofessional team strategies for improving care coordination và communication lớn advance mitral regurgitation & improve sầu outcomes.
Earn continuing education credits (CME/CE) on this topic.


Introduction

Mitral regurgitation (MR) is caused by the retrograde flow of blood from the left ventricle (LV) into lớn the left atrium (LA) through the mitral valve sầu (MV), causing a systolic murmur heard best at the apex of the heart with radiation lớn the left axilla. MR is the most common valvular abnormality worldwide, affecting over 2% of the total population & has a prevalence that increases with age.<1><2><3> This article will Reviews và summarize the characteristics, pathophysiology, etiology, management, and treatment of mitral regurgitation. 

Anatomy of Mitral Valve

The mitral valve sầu consists of two leaflets (anterior và posterior) sitting within the annulus. The posterior mitral leaflet originates from the left atrial (LA) endocardium. A subvalvular apparatus, comprising of 2 papillary muscles (anterolateral and posteromedial), arise from the LV myocardium and the chordae tendineae, supporting the leaflets.

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<4><5> 

Types of MR 

Mitral regurgitation can subdivide inlớn primary & secondary causes.<6> 

Primary Mitral Regurgitation


Also called degenerative or organic

Secondary Mitral Regurgitation


Also called functional or ischemic
Leads to mitral annular dilatation or displacement of papillary muscles causing retrograde flow from improperly closed mitral valve leaflets

Carpentier"s Classification<3><9><10>


Type 1: Normal leaflet motion
Caused by annular dilation or leaflet perforation
Regurgitation jet directed centrally