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Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

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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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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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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,...
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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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Cardiac lipofibromatosis.

Seeger Shen1, Jacques Rizkallah, Iain D C Kirkpatrick

  • 1Section of Cardiology, Department of Internal Medicine, University of Manitoba, Winnipeg, Manitoba, Canada.

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Summary

This case study highlights cardiac lipofibromatosis, a rare heart condition. Advanced imaging aided in diagnosing this condition, which required pacemaker implantation due to associated arrhythmias.

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Area of Science:

  • Cardiology
  • Cardiac Pathology
  • Medical Imaging

Background:

  • Cardiac lipofibromatosis is a rare, benign cardiac tumor characterized by the infiltration of mature adipose tissue and fibrous stroma.
  • This condition can present with various clinical manifestations, often mimicking other cardiac pathologies.
  • Understanding its imaging characteristics is crucial for accurate diagnosis and management.

Observation:

  • A patient presented with symptoms indicative of cardiac dysfunction.
  • The patient was diagnosed with atrial fibrillation and complete heart block.
  • This necessitated the implantation of a permanent pacemaker.

Findings:

  • Multimodality cardiac imaging, including transthoracic echocardiography and cardiac magnetic resonance (CMR), was employed for detailed tissue characterization.
  • Imaging findings were consistent with cardiac lipofibromatosis, allowing for differentiation from other cardiac masses.
  • The diagnostic utility of CMR in delineating the specific tissue composition of the tumor was notable.

Implications:

  • This case underscores the importance of considering rare cardiac tumors in the differential diagnosis of complex arrhythmias.
  • The successful application of multimodality imaging highlights its role in characterizing challenging cardiac lesions.
  • Accurate diagnosis and characterization of cardiac lipofibromatosis can guide appropriate clinical management and patient care.