Myocardial Tissue Characterization and Fibrosis by Imaging

Area of Science:

• Cardiology
• Medical Imaging
• Pathophysiology

Background:

• Myocardial fibrosis, focal or diffuse, is prevalent in cardiac diseases and predicts adverse cardiovascular events.
• Histological analysis is definitive but invasive endomyocardial biopsy is impractical for routine clinical use.
• Noninvasive cardiac imaging provides surrogate biomarkers for fibrosis, edema, and infiltration.

Purpose of the Study:

• To review the pathophysiology of cardiac diseases associated with myocardial fibrosis.
• To summarize the principles, benefits, and drawbacks of various cardiac imaging modalities.
• To emphasize the role of imaging in detecting focal and diffuse myocardial fibrosis.

Main Methods:

• Review of pathophysiological mechanisms of cardiac diseases.
• Analysis of principles, advantages, and disadvantages of cardiac imaging techniques.
• Focus on echocardiography, SPECT, PET, MDCT, and cardiac MRI for tissue characterization.

Main Results:

• Cardiac imaging modalities offer noninvasive assessment of myocardial tissue characteristics.
• Different imaging techniques provide varying degrees of information on fibrosis, edema, and infiltration.
• Cardiac MRI and PET show particular promise for detailed myocardial tissue characterization.

Conclusions:

• Noninvasive cardiac imaging is crucial for diagnosing and managing cardiac diseases with myocardial fibrosis.
• Imaging modalities provide essential surrogate biomarkers, overcoming limitations of invasive biopsy.
• Further research into advanced imaging techniques will enhance the detection and characterization of myocardial fibrosis.