A case of right ventricular dilated cardiomyopathy

Area of Science:

• Cardiology
• Pathology
• Genetics

Background:

• Sudden cardiac death (SCD) in adolescents often presents diagnostic challenges.
• Ventricular arrhythmias are a common cause of SCD in younger individuals.

Observation:

• Autopsy of a 16-year-old female revealed marked right ventricular dilation due to extensive fibroadipose tissue infiltration.
• Myocardial degeneration, similar to dilated cardiomyopathy, was observed in both ventricles, predominantly in the right.
• Findings excluded Uhl's anomaly and parchment heart due to incomplete myocyte depletion.

Findings:

• The case presented features consistent with arrhythmogenic right ventricular dysplasia but with significant myocardial degeneration.
• Histological evidence pointed towards a primary myocardial disease rather than a congenital defect.
• Diagnosis was established as right ventricular dilated cardiomyopathy, a variant of dilated cardiomyopathy with predominant right-sided lesions.

Implications:

• This case highlights the importance of considering primary myocardial diseases in adolescent sudden cardiac death.
• The findings support expanding the concept of arrhythmogenic cardiomyopathies to include primary myocardial degeneration.
• Accurate pathological diagnosis is crucial for understanding and potentially preventing future cases of sudden cardiac death.