Right ventricular involvement in hypertrophic cardiomyopathy: Patterns and implications

Kalliopi Keramida1, George Lazaros1, Petros Nihoyannopoulos2

  • 1Unit of Inherited Cardiovascular Diseases/Heart Center of the Young and Athletes, First Department of Cardiology, Hippokration General Hospital, National and Kapodistrian University of Athens, Greece.

Insights

Hypertrophic cardiomyopathy (HCM) often affects the right ventricle (RV), causing subtle yet significant changes. Routine RV assessment is crucial for managing HCM patients and improving prognosis.

Area of Science:

  • Cardiology
  • Genetics
  • Pathology

Background:

  • Hypertrophic cardiomyopathy (HCM) is a common inherited heart disease.
  • Current diagnostic criteria and research predominantly focus on the left ventricle.
  • Right ventricular (RV) involvement in HCM is often overlooked but clinically significant.

Purpose of the Study:

  • To highlight the structural and functional changes in the right ventricle in HCM patients.
  • To emphasize the prognostic implications of RV involvement.
  • To advocate for routine inclusion of RV assessment in HCM evaluation.

Main Methods:

  • Review of existing literature on RV involvement in HCM.
  • Analysis of histological findings and pathogenetic mechanisms.
  • Evaluation of echocardiographic indices, including global longitudinal strain.

Main Results:

  • RV involvement in HCM presents with variable hypertrophy and potential dynamic obstruction.
  • Subtle systolic dysfunction is detected by impaired global longitudinal strain, not classical indices.
  • Diastolic dysfunction is evident, linked to fibrosis and impaired RV filling.
  • RV involvement correlates with increased arrhythmias, heart failure, and sudden cardiac death risk.

Conclusions:

  • Right ventricular changes are integral to HCM pathophysiology and prognosis.
  • Standard echocardiography may underestimate RV dysfunction; advanced techniques like strain imaging are valuable.
  • Comprehensive RV assessment is essential for accurate HCM diagnosis and management.

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