Hypertrophic cardiomyopathy - phenotypic variations beyond wall thickness

Area of Science:

• Cardiology
• Medical Imaging
• Pathology

Background:

• Hypertrophic cardiomyopathy (HCM) is defined by left ventricular hypertrophy (LVH) unexplained by other cardiac or systemic diseases.
• Understanding the diverse morphologic and histologic changes in HCM is crucial for accurate interpretation of cardiac imaging.
• Early detection of HCM-associated findings can lead to timely diagnosis and management, improving patient outcomes.

Purpose of the Study:

• To describe the spectrum of morphologic variations in hypertrophic cardiomyopathy (HCM) beyond myocardial thickening.
• To highlight key imaging features of associated cardiac structures in HCM.
• To emphasize the importance of recognizing these variations for early diagnosis and treatment.

Main Methods:

• Review of imaging findings in patients with hypertrophic cardiomyopathy (HCM).
• Description of characteristic morphologic variations including papillary muscle and mitral valve abnormalities, myocardial crypts, and left ventricular bands.
• Discussion of dystrophic calcification patterns associated with increased myocardial tension.

Main Results:

• Morphologic variations in HCM extend beyond simple myocardial thickening.
• Key findings include abnormalities of papillary muscles and mitral valve, myocardial crypts, and ventricular bands.
• Dystrophic calcification may be present, reflecting increased myocardial wall tension.

Conclusions:

• Recognizing diverse morphologic variations in HCM is essential for accurate diagnosis and management.
• Associated findings may be present even in the absence of significant left ventricular hypertrophy (LVH).
• Comprehensive imaging interpretation aids in the early identification and treatment of hypertrophic cardiomyopathy (HCM).