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Heart Stiffening in Pediatric Dilated Cardiomyopathy: Causes of Severity

Noor Mohammad Noori1, Alireza Teimouri2

  • 1Department of Pediatrics, School of Medicine, Children and Adolescents Health Research Center, Research Institute of Cellular and Molecular Sciences in Infectious Diseases, Ali Ibne Abitaleb Hospital, Zahedan University of Medical Sciences, Zahedan, Iran.

The Journal of Tehran Heart Center
|May 5, 2025
PubMed

Insights

Children with dilated cardiomyopathy (DCM) show increased aortic stiffness and reduced distensibility. This indicates that aortic stiffness is a significant factor contributing to the severity of DCM in pediatric patients.

Area of Science:

  • Pediatric Cardiology
  • Cardiovascular Physiology
  • Biomedical Engineering

Background:

  • Cardiomyopathy can cause heart stiffness and lead to heart failure.
  • Dilated cardiomyopathy (DCM) is a condition affecting heart muscle.
  • Understanding aortic stiffness in pediatric DCM is crucial for assessing disease severity.

Purpose of the Study:

  • To investigate aortic stiffness in children diagnosed with dilated cardiomyopathy (DCM).
  • To determine the contribution of aortic stiffness to the overall severity of DCM in pediatric patients.

Main Methods:

  • A case-control study comparing 48 children with DCM to 96 healthy controls.
  • Measurements included aortic strain, stiffness index, distensibility, and pressure strain elastic modulus.
  • Statistical analysis was performed using SPSS 18, with P<0.05 considered significant.

Main Results:

  • Children with DCM demonstrated significantly reduced aortic distensibility (P=0.004) and elevated aortic stiffness (P=0.001).
  • Aortic strain was reduced, and pressure strain elastic modulus was elevated in the DCM group.
  • Aortic stiffness index varied with the Ross classification post-treatment.

Conclusions:

  • Pediatric patients with DCM exhibit impaired aortic elasticity.
  • Reduced aortic distensibility and increased aortic stiffness are characteristic of DCM in children.
  • Aortic stiffness is a relevant factor in the pathophysiology of pediatric DCM.
Abstract

Keywords:
Cardiomyopathy, dilatedChildrenVascular stiffness

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