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Related Concept Videos

Myocarditis I: Introduction01:21

Myocarditis I: Introduction

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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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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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Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

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Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
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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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Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

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Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
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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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Related Experiment Video

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Tissue Characterization in Cardiac Amyloidosis.

Veronica Musetti1, Francesco Greco2, Vincenzo Castiglione1

  • 1Health Science Interdisciplinary Center, Scuola Superiore di Studi Universitari, S.Anna, 56127 Pisa, Italy.

Biomedicines
|December 23, 2022
PubMed
Summary

Cardiac amyloidosis (CA) diagnosis is evolving. Tissue characterization remains vital for accurate amyloid typing, distinguishing between amyloid light-chain (AL) and transthyretin (ATTR) forms, guiding crucial treatment decisions.

Keywords:
AL amyloidosisabdominal fat tissue biopsycardiac amyloidosisendomyocardial biopsyhistologyimmunohistochemistrymass spectrometrytransthyretin amyloidosis

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Area of Science:

  • Cardiology
  • Pathology
  • Medical Diagnostics

Background:

  • Cardiac amyloidosis (CA) was historically considered rare, but improved diagnostics reveal a higher prevalence.
  • Amyloid light-chain (AL) and transthyretin (ATTR) amyloidosis are the primary forms affecting the heart.
  • Accurate amyloid typing is critical due to differing treatments and prognoses.

Purpose of the Study:

  • To review the current state of tissue characterization techniques for diagnosing and typing cardiac amyloidosis.
  • To discuss the evolution of diagnostic tools and their impact on CA epidemiology.
  • To explore future directions in CA tissue characterization.

Main Methods:

  • Review of histochemistry, immunohistochemistry, and mass spectrometry in CA diagnosis.
  • Analysis of diagnostic criteria for non-biopsy diagnosis in ATTR amyloidosis.
  • Evaluation of tissue characterization as the gold standard, especially for AL amyloidosis.

Main Results:

  • Advancements in diagnostic tools have reshaped the understanding of CA epidemiology.
  • While non-biopsy diagnosis is possible for ATTR amyloidosis, tissue analysis is definitive.
  • Tissue characterization methods are essential for precise diagnosis and subtyping of CA.

Conclusions:

  • Tissue characterization is indispensable for accurate cardiac amyloidosis diagnosis and typing.
  • Understanding CA epidemiology is shifting due to enhanced diagnostic capabilities.
  • Future research should focus on refining and advancing tissue characterization techniques for CA.