Assessing cardiac stiffness using ultrasound shear wave elastography

Area of Science:

• Cardiology
• Biomedical Engineering
• Medical Imaging

Background:

• Shear wave elastography (SWE) introduces myocardial stiffness measurement to echocardiography.
• Assessing myocardial stiffness can enhance understanding of cardiac pathophysiology and disease management.

Purpose of the Study:

• To review the mechanical concepts of cardiac SWE.
• To overview preclinical and clinical studies in cardiac SWE.
• To identify challenges for clinical implementation.

Main Methods:

• Detecting fast mechanical waves on the heart wall using high frame rate echography.
• Converting wave propagation speed into myocardial stiffness values.
• Adapting processing methods for the heart's dynamic geometry and material properties.

Main Results:

• Cardiac SWE requires adapted processing due to complex wave physics.
• Advanced analysis can extract features like viscosity and anisotropy.
• Preclinical and clinical studies show potential for cardiac SWE.

Conclusions:

• Cardiac SWE offers a novel approach to assessing myocardial stiffness.
• Overcoming mechanical and technical challenges is crucial for clinical adoption.
• Further research can refine SWE for improved cardiac diagnostics and treatment guidance.