Related Experiment Video

Updated: Jul 18, 2026

A Model of Cardiac Remodeling Through Constriction of the Abdominal Aorta in Rats
07:31

A Model of Cardiac Remodeling Through Constriction of the Abdominal Aorta in Rats

Published on: December 2, 2016

Hypercontractile cardiac states simulating hypertrophic cardiomyopathy

P C Come, B H Bulkley, Z D Goodman

    Circulation
    |June 1, 1977
    PubMed

    Insights

    Hypertrophic cardiomyopathy (HCM) findings like mitral valve movement are not exclusive to this condition. Some patients show typical HCM signs without the characteristic asymmetric septal hypertrophy, challenging diagnostic specificity.

    Area of Science:

    • Cardiology
    • Genetics
    • Pathology

    Background:

    • Hypertrophic cardiomyopathy (HCM), also known as idiopathic hypertrophic subaortic stenosis (IHSS), is an autosomal dominant myocardial disease.
    • It is typically characterized by asymmetric septal hypertrophy and specific physical and echocardiographic findings.

    Observation:

    • Four patients presented with systolic anterior movement of the mitral valve and typical HCM auscultatory findings.
    • Echocardiographic and scintiphotographic studies did not reveal asymmetric septal hypertrophy in these patients.
    • Postmortem examination of one patient showed mild concentric left ventricular hypertrophy and normal myocardial architecture.

    Findings:

    • Systolic anterior movement of the mitral valve and characteristic physical findings are not specific to HCM.
    • The observed patients lacked the hallmark asymmetric septal hypertrophy associated with HCM.

    Implications:

    • Re-evaluation of diagnostic criteria for HCM may be necessary.
    • These findings suggest that HCM may present with varied echocardiographic and histological features.
    • Further research is needed to understand the full spectrum of HCM presentations and their underlying mechanisms.

    More Related Videos

    Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine10:08

    Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine

    Published on: February 17, 2018

    Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction09:20

    Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction

    Published on: February 13, 2021

    Related Concept Videos

    Imbalances in Cardiac Output01:26

    Imbalances in Cardiac Output

    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 blood...
    Mitral Regurgitation I: Introduction01:20

    Mitral Regurgitation I: Introduction

    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...
    Heart Failure II: Pathophysiology01:29

    Heart Failure II: Pathophysiology

    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...
    Cardiomyopathy II: Dilated Cardiomyopathy01:30

    Cardiomyopathy II: Dilated Cardiomyopathy

    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,...
    Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

    Cardiomyopathy III: Hypertrophic Cardiomyopathy

    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...
    Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

    Cardiomyopathy IV: Restrictive Cardiomyopathy

    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...