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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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Myocarditis I: Introduction01:21

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Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
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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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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.
There are various classifications for PH, each relating to different underlying causes and also...
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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.
Compared to skeletal muscles, cardiac muscle cells are small and mostly have a single nucleus. Additionally, they are usually...
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Rheumatic Heart Disease I: Introduction01:23

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Rheumatic heart disease or RHD is a chronic condition that results from rheumatic fever, causing permanent damage to the heart valves.Etiology and Risk FactorsIt primarily arises from rheumatic fever, an inflammatory disease that can develop after untreated or inadequately treated group A streptococcal (GAS) pharyngitis. Streptococcus spreads through direct contact with oral or respiratory secretions. While the bacteria are the causative agents, factors like malnutrition, overcrowding, poor...
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Related Experiment Video

Updated: Jun 6, 2025

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Definitional Challenges in Understanding Hypertrophic Cardiomyopathy.

Jan M Federspiel1, Jochen Pfeifer2, Frank Ramsthaler1

  • 1Institute for Legal Medicine, Faculty of Medicine, Saarland University, Campus Homburg, Building 49.1, Kirrberger Straße 100, 66421 Homburg/Saar, Germany.

Diagnostics (Basel, Switzerland)
|November 27, 2024
PubMed
Summary

Hypertrophic cardiomyopathy (HCM) definitions vary, impacting research. This review clarifies differing perspectives on HCM, a common genetic heart condition, to improve understanding and data consistency.

Keywords:
disease definitionhypertrophic cardiomyopathymacroscopic pathoanatomymyocardial structural alterationsobstructive hypertrophic cardiomyopathy

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Area of Science:

  • Cardiology
  • Genetics
  • Pathology

Background:

  • Hypertrophic cardiomyopathy (HCM) is the most prevalent hereditary cardiomyopathy.
  • It is frequently linked to genetic mutations affecting sarcomeric proteins.

Purpose of the Study:

  • To evaluate divergent definitions of HCM from a pathoanatomical viewpoint.
  • To explore the impact of differing definitions on research and clinical understanding.

Main Methods:

  • A narrative review of existing literature.
  • PubMed database search using advanced algorithms.
  • Analysis of perspectives from pathologists, clinicians, and researchers.

Main Results:

  • Major cardiology societies present conflicting definitions of HCM.
  • Discrepancies exist between defining HCM as a specific genetic disease versus a broad 'spectrum of the thick heart'.
  • These definitional differences can affect prevalence and mortality data, hindering research comparability.

Conclusions:

  • A unified pathoanatomical perspective is crucial for advancing HCM knowledge.
  • Interdisciplinary and translational approaches are essential for a comprehensive understanding of HCM.
  • Clarifying HCM definitions will improve research integrity and clinical application.