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Related Concept Videos

Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

25
Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Mitral Regurgitation I: Introduction01:20

Mitral Regurgitation I: Introduction

27
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...
27

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Related Experiment Video

Updated: Aug 8, 2025

Induction of Right Ventricular Failure by Pulmonary Artery Constriction and Evaluation of Right Ventricular Function in Mice
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Induction of Right Ventricular Failure by Pulmonary Artery Constriction and Evaluation of Right Ventricular Function in Mice

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Characterization of Favorable Right Ventricular Dimensions for Optimal Reverse Remodeling Following Pulmonary Valve

Hiba Z Ghandour1, Miza Salim Hammoud2, Aisha Zia1

  • 1Department of Thoracic and Cardiothoracic Surgery, Cleveland Clinic, Cleveland, Ohio.

Seminars in Thoracic and Cardiovascular Surgery
|February 25, 2023
PubMed
Summary

Pulmonary valve replacement (PVR) timing impacts right ventricular (RV) recovery. Earlier PVR, guided by echocardiography, may optimize RV reverse remodeling and function after surgery.

Keywords:
Pulmonary valve replacementRight ventricular end diastolic area indexRight ventricular end diastolic volume index

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Area of Science:

  • Cardiology
  • Cardiovascular Imaging
  • Cardiac Surgery

Background:

  • Pulmonary valve replacement (PVR) is crucial for managing severe pulmonary regurgitation.
  • Assessing right ventricular (RV) recovery post-PVR is essential for patient outcomes.
  • Current thresholds for PVR timing need evaluation against longitudinal RV remodeling data.

Purpose of the Study:

  • To correlate cardiac magnetic resonance (CMR) metrics with echocardiographic findings for RV assessment post-PVR.
  • To analyze longitudinal RV size and function trajectories after PVR.
  • To identify optimal PVR timing and evaluate echocardiography's role in RV surveillance.

Main Methods:

  • Retrospective analysis of 174 patients undergoing PVR for severe pulmonary regurgitation.
  • Longitudinal assessment of RV size and function using echocardiography (RVEDAi) and CMR (RVEDVi).
  • Nonlinear mixed-effects models to analyze RV remodeling trajectories and identify inflection points.

Main Results:

  • Strong correlation between RV end-diastolic area index (RVEDAi) and RV end-diastolic volume index (RVEDVi) (r=0.59, P<0.0001).
  • RVEDAi showed slow decrease over 10 years post-PVR; an inflection point at 24 cm²/m² at 1 year indicated impaired reverse remodeling.
  • Preoperative RVEDVi <150 mL/m² was associated with accelerated RV recovery compared to RVEDVi ≥150 mL/m².

Conclusions:

  • Right ventricular reverse remodeling post-PVR is a prolonged process.
  • Current PVR guidelines are linked to significant RV recovery, supporting earlier intervention.
  • Echocardiography shows potential as a substitute for CMR in post-PVR surveillance and triage.