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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 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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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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Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
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Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

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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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IntroductionThe mitral valve, one of the heart's four valves, regulates blood flow. These valves have flaps that open and close to direct blood properly through the heart and body. During each heartbeat, the flaps open for blood to pass through and seal shut to prevent backflow. Specifically, the mitral valve opens to allow blood flow from the heart's upper left chamber to the lower left chamber. It then closes securely as the lower left chamber contracts to pump blood to the body, preventing...
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Cardiomiopatía dilatada mediada por vías accesorias en un bebé

Claire Bertail-Galoin1, Nabil Jbilou1, Victor Waldmann2

  • 1Felix Guyon Hospital Center, CHU La Réunion, Competence Center for Complex Congenital Heart Disease - M3C, Saint-Denis, France.

Cardiology in the young
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PubMed
Resumen

La miocardiopatía dilatada de un bebé de 10 meses de edad se resolvió mediante el tratamiento de la disincronia septal causada por la preexcitación de la vía accesoria. El tratamiento con flecaína normalizó la función ventricular izquierda eliminando la preexcitación.

Palabras clave:
trayectoria accesoriaMiocardiopatíaBloqueo de la rama del haz izquierdoPre-excitación

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Área de la Ciencia:

  • Cardiología Pediátrica
  • Electrofisiología
  • Investigación de la cardiomiopatía

Sus antecedentes:

  • La disincronia septal puede conducir a la miocardiopatía dilatada en los bebés.
  • Las vías accesorias pueden causar anormalidades eléctricas cardíacas.
  • Los síndromes de preexcitación pueden manifestarse sin taquicardia manifiesta.

Objetivo del estudio:

  • Para describir un caso de miocardiopatía dilatada infantil relacionada con la preexcitación de la vía accesoria.
  • Investigar el impacto de la preexcitación en la sincronía septal y la función ventricular.
  • Evaluar la eficacia de la flecainida en el tratamiento de esta afección.

Principales métodos:

  • Informe de caso de un bebé de 10 meses con miocardiopatía dilatada.
  • Análisis del electrocardiograma (ECG) para identificar la preexcitación y la falta de sincronía.
  • Evaluación de la función ventricular izquierda.
  • Intervención terapéutica con flecainida.

Principales resultados:

  • El bebé presentaba una miocardiopatía dilatada atribuida a la disincronia septal izquierda de una vía accesoria septal derecha.
  • No se observó taquicardia atrioventricular recíproca.
  • El tratamiento con flecaína eliminó con éxito la preexcitación antegrada en el ECG.
  • La función ventricular izquierda se normalizó después del tratamiento.

Conclusiones:

  • La preexcitación mediada por vías accesorias puede causar disincronia septal significativa y miocardiopatía dilatada en los lactantes.
  • El diagnóstico precoz y la terapia antiarrítmica dirigida, como la flecainida, pueden revertir la disfunción cardíaca.
  • Este caso destaca la importancia de considerar las anomalías electrofisiológicas en la miocardiopatía pediátrica.