Objective:
To evaluate whether myocardial stiffness measured with three-dimensional shear wave elastography can differentiate between light chain cardiac amyloidosis and transthyretin cardiac amyloidosis.
Approach:
- Study Design: A study of 72 patients with cardiac amyloidosis assessed myocardial stiffness using transthoracic three-dimensional shear wave elastography, alongside echocardiography, scintigraphy, biopsy, and blood testing.
- Patient Cohort: The cohort included 44 patients with transthyretin cardiac amyloidosis, 24 patients with light chain cardiac amyloidosis, and 4 patients with nontypable amyloidosis.
- Measurement Technique: Ten three-dimensional shear wave elastography measurements were acquired in each myocardial segment during diastasis using electrocardiographic gating.
- Algorithm Development: An algorithm was developed incorporating patient age, N-terminal pro-B-type natriuretic peptide, and median shear wave velocity measurements.
Key Findings:
- Shear wave velocity was higher in patients with transthyretin cardiac amyloidosis compared to those with light chain cardiac amyloidosis in the basal anteroseptal wall and right ventricular wall.
- No echocardiographic parameters discriminated between the two types of cardiac amyloidosis.
- The developed algorithm achieved 100% sensitivity and 100% specificity in distinguishing the two subtypes.
Interpretation:
Conclusion:
Sources:
This content is an AI-generated, fully rewritten summary based on a published scholarly article. It does not reproduce the original text and is not a substitute for the original publication. Readers are encouraged to consult the source for full context, data, and methodology.
