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Related Concept Videos

Pathophysiology of Heart Failure01:17

Pathophysiology of Heart Failure

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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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Imbalances in Cardiac Output01:26

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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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Pathophysiology of Cardiac Performance01:29

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Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...
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Pulmonary Hypertension: Classification and Pathogenesis01:30

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Pulmonary hypertension (PH) is a severe health condition in which the mean pulmonary arterial pressure increases to 25 mmHg or more, even when the body is at rest. This high pressure in the blood vessels that transport blood from the heart to the lungs can cause various symptoms, including shortness of breath, can lead to right heart failure, and significantly affect the overall quality of life.
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Structure of Cardiac Muscles01:13

Structure of Cardiac Muscles

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Cardiac muscle, or myocardium, is a specialized type of muscle found exclusively in the heart. Its unique structural and functional characteristics enable the heart to perform its vital role of pumping blood throughout the body continuously and rhythmically. The cardiac muscle cells, or cardiomyocytes, possess an endomysium and perimysium but do not have an epimysium.
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Specialized Characteristics of Cardiac Muscles01:27

Specialized Characteristics of Cardiac Muscles

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The primary role of cardiac muscles is to propel blood throughout the cardiovascular system. The cardiac muscle cells, or cardiomyocytes, exhibit specialized characteristics that allow them to perform this function.
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Updated: Jun 30, 2025

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
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Hypertrophic Cardiomyopathy.

Jason N Dungu1,2, Amy Hardy-Wallace3, Anthony D Dimarco3

  • 1Essex Cardiothoracic Centre, Nethermayne, Basildon, Essex SS16 5NL, UK. j.dungu@nhs.net.

Current Heart Failure Reports
|March 15, 2024
PubMed
Summary

Early diagnosis of hypertrophic cardiomyopathy (HCM) is crucial for risk stratification and intervention. This review guides clinicians on diagnosis, phenocopy differentiation, and emerging treatments like myosin inhibitors for better patient and family outcomes.

Keywords:
Cardiovascular magnetic resonance imagingEchocardiographyGene therapyGeneticsHypertrophic cardiomyopathy

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Area of Science:

  • Cardiology
  • Genetics
  • Inherited Cardiac Conditions

Background:

  • Hypertrophic cardiomyopathy (HCM) is a prevalent inherited cardiac condition linked to sudden cardiac death.
  • Timely diagnosis and risk stratification are vital for effective management and preventing adverse outcomes.
  • Inconsistent screening protocols can lead to missed high-risk relatives or unnecessary burden on low-risk individuals.

Purpose of the Study:

  • To provide a comprehensive guide for clinicians on the diagnostic pathway for HCM.
  • To discuss conditions that mimic HCM (phenocopies) and methods for differentiation.
  • To review novel treatment options, including myosin inhibitors and gene editing therapies.

Main Methods:

  • Review of current literature on hypertrophic cardiomyopathy diagnosis and management.
  • Inclusion of a diagnostic flowchart for clinical decision-making.
  • Discussion of differentiating HCM from its phenocopies.

Main Results:

  • Summarizes recent advancements in clinical decision-making for HCM.
  • Highlights the benefits of early identification and referral to specialist centers.
  • Emphasizes the potential gains from novel therapies for genotype-positive/phenotype-negative patients.

Conclusions:

  • Effective screening and early diagnosis of HCM are essential for optimal patient care and family risk assessment.
  • Understanding phenocopies is critical for accurate HCM diagnosis.
  • Emerging therapies offer new hope, particularly for individuals identified through genetic screening.