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Related Concept Videos

Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

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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.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
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Mitral Regurgitation I: Introduction01:20

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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

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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Mitral Stenosis II: Clinical features and Diagnostic Tests01:23

Mitral Stenosis II: Clinical features and Diagnostic Tests

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Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
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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

Cardiomyopathy IV: Restrictive Cardiomyopathy

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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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Related Experiment Video

Updated: May 6, 2026

Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism
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Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism

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Left ventricular stiffness.

J A Wisneski, J D Bristow

    Annual Review of Medicine
    |January 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Left ventricular stiffness, the pressure-volume relationship, impacts heart function. Altering this relationship therapeutically offers potential for managing heart disorders and preventing pulmonary hypertension.

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    Area of Science:

    • Cardiovascular Physiology
    • Cardiac Mechanics

    Background:

    • Left ventricular stiffness describes the heart's pressure-volume relationship.
    • Various cardiovascular disorders can alter ventricular stiffness.
    • Ventricular stiffness plays a critical role in cardiac function and disease progression.

    Purpose of the Study:

    • To explore the implications of altered left ventricular stiffness in cardiovascular disorders.
    • To highlight the protective role of pressure-volume shifts in conditions like mitral regurgitation.
    • To discuss the risks associated with increased ventricular stiffness, such as pulmonary capillary hypertension.

    Main Methods:

    • Analysis of the pressure-volume (PV) relationship in the left ventricle.
    • Review of pathophysiological mechanisms in conditions affecting ventricular stiffness.
    • Examination of clinical implications of altered ventricular mechanics.

    Main Results:

    • In mitral regurgitation, a pressure-volume shift protects pulmonary capillaries from elevated pressures.
    • Ventricular hypertrophy and ischemic heart disease increase left ventricular stiffness.
    • Increased stiffness elevates the risk of pulmonary capillary hypertension.

    Conclusions:

    • Left ventricular stiffness is a key determinant of cardiovascular health.
    • Understanding the ventricular pressure-volume relationship is crucial for diagnosing and managing heart conditions.
    • Therapeutic modulation of the ventricular pressure-volume relationship presents a promising avenue for future treatment.