Infiltrative cardiovascular diseases: cardiomyopathies that look alike

Area of Science:

• Cardiology
• Pathology

Background:

• Infiltrative cardiomyopathies involve abnormal substance deposition, leading to ventricular rigidity and impaired filling.
• These conditions can present with increased wall thickness or chamber enlargement, mimicking other cardiac diseases like hypertrophic or ischemic cardiomyopathy.
• While low-voltage QRS complexes suggest infiltrative cardiomyopathy (e.g., cardiac amyloidosis), this finding is not universal.

Purpose of the Study:

• To differentiate infiltrative cardiomyopathies from other cardiac conditions based on clinical presentation and imaging features.
• To highlight the diagnostic challenges posed by the varied presentations of infiltrative cardiomyopathies.
• To emphasize the necessity of definitive diagnostic methods for appropriate patient management.

Main Methods:

• Review of clinical presentations of infiltrative cardiomyopathies.
• Analysis of functional and morphologic cardiac features.
• Discussion of diagnostic criteria and confirmatory tests.

Main Results:

• Infiltrative cardiomyopathies can mimic hypertrophic cardiomyopathy (thickening) or ischemic cardiomyopathy (dilated chambers, wall motion abnormalities).
• Low-voltage QRS on electrocardiogram is suggestive but not consistently present in all infiltrative cardiomyopathies.
• Clinical and imaging findings provide initial diagnostic clues, but definitive diagnosis often relies on tissue or serologic evaluation.

Conclusions:

• Accurate diagnosis of infiltrative cardiomyopathies relies on integrating clinical, imaging, and electrocardiographic data.
• Distinguishing infiltrative cardiomyopathies from other heart diseases is crucial for effective therapeutic strategies.
• Tissue or serologic confirmation is frequently required to establish a definitive diagnosis and initiate appropriate treatment for infiltrative cardiomyopathies.