Role of T1-weighted MRI in Identifying Coronary Intraplaque Hemorrhage: CATCH the Truly High-Risk Plaque

Area of Science:

• Cardiovascular Imaging
• Atherosclerosis Research
• Medical Diagnostics

Background:

• Intraplaque hemorrhage (IPH) is a critical indicator of vulnerable atherosclerotic plaques.
• Atherothrombotic events are often precipitated by plaque rupture.
• Non-invasive imaging of coronary arteries is challenging due to their small size and motion artifacts.

Purpose of the Study:

• To review the pathophysiological basis of MRI-detected coronary IPH.
• To discuss the imaging characteristics of coronary IPH using MRI.
• To explore the clinical implications of identifying coronary IPH with MRI.

Main Methods:

• Magnetic resonance imaging (MRI) advances enable non-invasive detection of coronary IPH.
• MRI provides unique tissue characterization based on intrinsic signal properties.
• Comparison with coronary computed tomography angiography and intravascular imaging.

Main Results:

• Coronary high-intensity plaques on MRI often reflect recent IPH.
• Erythrocyte-derived materials, not lipids, are the primary component of these plaques.
• MRI offers superior non-invasive tissue characterization compared to other modalities.

Conclusions:

• MRI is a promising tool for non-invasively detecting coronary IPH.
• Identifying IPH via MRI can help assess plaque vulnerability and atherothrombotic risk.
• MRI-based IPH detection has significant clinical implications for patient management.