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Right Ventricular Fibrosis.

Stine Andersen1, Jens Erik Nielsen-Kudsk1, Anton Vonk Noordegraaf2

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Summary
This summary is machine-generated.

Right ventricular (RV) fibrosis in pulmonary hypertension (PH) has a dual role: it can be adaptive, preventing RV dilation, but also maladaptive, impairing RV function and leading to failure. Further research is needed to clarify its exact impact.

Keywords:
fibrosispulmonary hypertensionright ventricle

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Area of Science:

  • Cardiology
  • Pulmonary Medicine
  • Pathology

Background:

  • Right ventricular (RV) fibrosis is implicated in the development of RV failure in pulmonary hypertension (PH).
  • The extracellular matrix's collagen network may influence RV dilatation under pressure overload.
  • Idiopathic pulmonary arterial hypertension (IPAH) and chronic thromboembolic PH (CTEPH) serve as models for studying pressure overload effects on the RV.

Purpose of the Study:

  • To review clinical evidence of RV fibrosis in IPAH and CTEPH.
  • To explore the relationship between RV fibrosis and RV function.
  • To discuss the clinical significance of RV fibrosis in PH patients.

Main Methods:

  • Review of clinical evidence and experimental data on RV fibrosis in PH.
  • Correlation analysis between RV fibrosis and RV function.
  • Discussion of therapeutic strategies and quantification techniques for RV fibrosis.

Main Results:

  • RV fibrosis presents a dual role in pressure-overloaded RVs in IPAH and CTEPH.
  • It acts as an adaptive response to prevent cardiomyocyte overstretch and maintain RV shape.
  • It also acts as a maladaptive response, increasing stiffness and disrupting myocardial function.

Conclusions:

  • RV fibrosis has a complex, dual role in the pathophysiology of PH.
  • Understanding this role is crucial for developing targeted therapies.
  • Improved quantification techniques are needed to elucidate the causal link between RV fibrosis and RV function.