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Related Concept Videos

Mitral Regurgitation I: Introduction01:20

Mitral Regurgitation I: Introduction

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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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Mitral Stenosis I: Introduction01:22

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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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Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

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Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
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The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
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Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

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Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
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Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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Related Experiment Video

Updated: Nov 20, 2025

Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography
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Right ventricular undersizing is associated with increased 1-year mortality.

Masashi Kawabori1, Andre C Critsinelis2, Camille E Hironaka1

  • 1Division of Cardiac Surgery, CardioVascular Center, Tufts Medical Center, Boston, Mass.

The Journal of Thoracic and Cardiovascular Surgery
|January 24, 2021
PubMed
Summary
This summary is machine-generated.

Right ventricular mass (RVM) undersizing in heart transplant recipients is linked to worse survival. Careful consideration of donor-recipient RVM matching is crucial for better post-transplant outcomes.

Keywords:
United Network for Organ Sharing registrydonor and recipient heart sizedonor-recipient heart matchheart transplantationpredicted heart massright ventricular masssurvivaltotal ventricular massundersizing

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Area of Science:

  • Cardiology
  • Transplantation Medicine
  • Cardiovascular Surgery

Background:

  • Right heart hemodynamic management is critical post-heart transplantation (HTx) due to right ventricular (RV) failure complications.
  • Current donor-recipient size matching relies on weight or total ventricular mass (TVM), with less emphasis on right ventricular mass (RVM).

Purpose of the Study:

  • To analyze the relationship between RVM matching and survival after heart transplantation.
  • To investigate the impact of RVM undersizing on post-HTx outcomes.

Main Methods:

  • Retrospective analysis of 38,740 adult HTx from the UNOS database (1997-2017).
  • Calculation of total ventricular mass (TVM) and RVM using validated equations.
  • Categorization of donor-recipient pairs into 4 RVM mismatch groups and analysis of RVM undersizing impact on 1-year survival, stroke, dialysis, and functional status.

Main Results:

  • RVM undersizing was observed when utilizing older or female donors.
  • Patients with RVM undersizing showed significantly worse 1-year survival (P < .001).
  • RVM undersizing independently predicted higher 1-year mortality (HR 1.23) and was associated with increased dialysis rates and poorer functional status.

Conclusions:

  • Right ventricular mass undersizing is an independent predictor of worse 1-year survival post-heart transplantation.
  • Older and female donors may be predisposed to RVM undersizing due to lower absolute predicted RVM.
  • Heart transplantation involving RVM-undersized donors necessitates careful risk-benefit assessment.