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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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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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Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

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Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
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Pathophysiology of Heart Failure01:17

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Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
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Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

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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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Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

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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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Related Experiment Video

Updated: Oct 21, 2025

Induction of Right Ventricular Failure by Pulmonary Artery Constriction and Evaluation of Right Ventricular Function in Mice
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Insulin Resistance Is Associated with Right Ventricular Dysfunction.

Jeff Min1, Mary E Putt2, Wei Yang2

  • 1Department of Medicine and.

Annals of the American Thoracic Society
|September 9, 2021
PubMed
Summary
This summary is machine-generated.

Insulin resistance is linked to reduced right ventricular (RV) systolic and diastolic function. This suggests individuals with insulin resistance may face early RV dysfunction risks, even without existing heart disease.

Keywords:
echocardiographyhigh-density lipoprotein cholesterolinsulin resistanceright ventricletriglyceride

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Area of Science:

  • Cardiology
  • Metabolic Syndrome Research
  • Echocardiography

Background:

  • Insulin resistance is a known risk factor for left ventricular dysfunction.
  • The impact of insulin resistance on right ventricular (RV) function is less understood.
  • Early detection of RV dysfunction is crucial for cardiovascular health.

Purpose of the Study:

  • To investigate the association between insulin resistance and RV function.
  • To evaluate RV systolic and diastolic parameters using echocardiography.
  • To assess these associations in adults without pre-existing cardiovascular disease.

Main Methods:

  • Retrospective cohort study utilizing the Multi-Ethnic Study of Atherosclerosis (MESA) dataset.
  • Insulin resistance quantified by the triglyceride (TG) to high-density lipoprotein (HDL) cholesterol ratio (TG:HDL).
  • Linear and logistic regression analyses applied to assess associations with echocardiographic RV function metrics.

Main Results:

  • Higher TG:HDL ratios correlated with impaired RV longitudinal strain and tricuspid annular plane systolic excursion.
  • Elevated TG:HDL was associated with increased odds of abnormal RV systolic function.
  • Insulin resistance also linked to reduced RV diastolic function, indicated by altered E/A and E/e' ratios.

Conclusions:

  • Insulin resistance is independently associated with decreased RV systolic and diastolic function.
  • Individuals with insulin resistance may be at higher risk for developing early RV dysfunction.
  • Findings highlight the importance of metabolic health in maintaining right heart function.