Layer-specific strain in patients with cardiac amyloidosis using tissue tracking MR

Area of Science:

• Cardiology
• Medical Imaging
• Biophysics

Background:

• Cardiac infiltration is a primary predictor of poor prognosis in systemic amyloidosis.
• Accurate evaluation of cardiac involvement is crucial for patient outcomes.

Purpose of the Study:

• To assess left ventricular myocardial deformation in cardiac amyloidosis (CA) using layer-specific tissue tracking MRI.
• To identify alterations in myocardial strain patterns specific to CA.

Main Methods:

• Layer-specific tissue tracking MRI was performed on 39 patients with CA and 39 healthy controls.
• Analysis focused on global and layer-specific strain parameters (GLS, GCS, GRS) from cine MRI sequences.

Main Results:

• Patients with CA exhibited significantly reduced whole-layer and layer-specific strain values compared to controls.
• Circumferential strain (GCS) demonstrated high diagnostic accuracy (AUC 0.995) for predicting reduced left ventricular ejection fraction (<40%) and was an independent predictor of systolic dysfunction.

Conclusions:

• Layer-specific tissue tracking MRI is a valuable tool for evaluating left ventricular myocardial deformation in cardiac amyloidosis.
• This method aids in the assessment of cardiac involvement and prediction of systolic dysfunction in CA patients.