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Related Concept Videos

Mitral Regurgitation III: Medical Management01:25

Mitral Regurgitation III: Medical Management

284
Mitral regurgitation (MR) is characterized by retrograde blood circulation from the left ventricle into the left atrium due to inadequate mitral valve closure. The severity of the condition, symptoms, and underlying cause determine treatment strategies.Monitoring and Pharmacological TreatmentPatients with mild to moderate MR typically do not need immediate intervention but regular monitoring to assess progression and guide treatment. Patients with mild MR should have an echocardiogram every 3-5...
284
Mitral Stenosis III: Medical Management01:26

Mitral Stenosis III: Medical Management

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Mitral stenosis, a condition marked by the narrowing of the mitral valve, necessitates an integrated approach for effective management. This approach includes preventative measures, medical therapy, and surgical interventions to reduce symptoms and prevent complications.PreventionPrevention of mitral stenosis primarily focuses on reducing the incidence of bacterial infections, particularly streptococcal infections, which can lead to rheumatic fever and subsequent valvular damage. Timely...
247
Aortic Regurgitation III: Medical Management01:25

Aortic Regurgitation III: Medical Management

399
Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...
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Mitral Regurgitation IV: Nursing Management01:28

Mitral Regurgitation IV: Nursing Management

311
Mitral regurgitation (MR) is a condition where the mitral valve does not close properly, leading to the backward flow of blood from the left ventricle into the left atrium during systole. This condition can arise from various causes, including rheumatic fever, infective endocarditis, or degenerative valve disease. Effective nursing management is crucial to optimizing patient outcomes and involves comprehensive assessment and targeted interventions.Comprehensive Patient AssessmentA detailed...
311
Mitral Valve Prolapse II: Assessment and Management01:22

Mitral Valve Prolapse II: Assessment and Management

438
IntroductionA range of clinical features characterizes Mitral Valve Prolapse (MVP), but it is important to note that many individuals with MVP are asymptomatic and may remain so throughout their lives. For those who do exhibit symptoms, the following are the key clinical features:Palpitations: This is a common symptom where individuals feel an irregular or rapid heartbeat. Palpitations in MVP are often due to arrhythmias such as premature ventricular contractions or supraventricular...
438
Mitral Regurgitation I: Introduction01:20

Mitral Regurgitation I: Introduction

423
Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
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Related Experiment Video

Updated: Jan 17, 2026

Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China
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Surgical Strategy for Atrial Functional Mitral Regurgitation With Atrial Fibrillation.

Chunrong Bao1, Ke Wei1, Dongfang Zhao2

  • 1Department of Cardiothoracic Surgery Xinhua Hospital, School of Medicine, Shanghai Jiaotong University Shanghai China.

Journal of the American Heart Association
|September 19, 2025
PubMed
Summary

Surgical strategies for atrial functional mitral regurgitation (AFMR) with atrial fibrillation (AF) show promise. Thoracoscopic procedures are effective for moderate AFMR, while Cox-Maze IV with mitral valvuloplasty suits severe cases, improving rhythm and reducing regurgitation.

Keywords:
Cox‐Maze IV procedureatrial fibrillationatrial functional mitral regurgitationthoracoscopic ablation

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Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Medical Technology

Background:

  • Atrial functional mitral regurgitation (AFMR) combined with atrial fibrillation (AF) presents a significant clinical challenge.
  • Effective surgical treatment strategies are needed for patients with AFMR and AF.

Purpose of the Study:

  • To evaluate surgical treatment strategies for AFMR based on the degree of mitral regurgitation (MR) and rhythm control therapy in patients with AF.
  • To compare outcomes of different surgical approaches for moderate and severe AFMR.

Main Methods:

  • Retrospective study of 145 patients with AF and MR (January 2017-January 2023).
  • Patients grouped into moderate AFMR (n=33), severe atrial regurgitation (SAR, n=56), and severe primary regurgitation (SPR, n=56).
  • Treatments included thoracoscopic AF procedure for moderate AFMR and mitral valvuloplasty with Cox-Maze IV for SAR and SPR.

Main Results:

  • At 2.6 years follow-up, sinus rhythm was maintained in 23/33 patients with moderate AFMR, with MR improvement in 26 patients.
  • Sinus rhythm maintenance was associated with MR reduction (P=0.0002).
  • SAR and SPR groups showed similar sinus rhythm maintenance rates (79.6% and 87.5%). SAR group had 47/56 patients with no MR post-procedure, but larger left atrial diameter than SPR group (P<0.001).

Conclusions:

  • Rhythm control therapy is crucial for managing AFMR with AF.
  • Thoracoscopic AF procedure is effective and minimally invasive for moderate AFMR.
  • Cox-Maze IV combined with mitral valvuloplasty offers optimal safety and effectiveness for severe AFMR.