Related Experiment Video
Updated: Apr 4, 2026

Genetic Analysis of Hereditary Transthyretin Ala97Ser Related Amyloidosis
Published on: June 9, 2018
Cardiac amyloidosis: pathology, nomenclature, and typing
1Department of Laboratory Medicine & Pathology, Mayo Clinic, Rochester, MN, USA; Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA.
Insights
Cardiac amyloidosis, a heart disease from misfolded protein deposits, requires precise typing beyond visual diagnosis. Accurate protein identification is crucial for targeted therapies and effective patient management.
Area of Science:
- Cardiology
- Pathology
- Biochemistry
Background:
- Amyloidosis is an emerging cause of heart disease due to misfolded protein deposition.
- Cardiac symptoms can be the primary presentation, even with systemic or localized deposition.
- Traditional diagnosis relies on pathologist identification of amyloid in tissue samples.
Purpose of the Study:
- To review gross and histopathologic features of cardiac amyloidosis.
- To discuss amyloid typing strategies for accurate protein identification.
- To highlight the importance of reporting nomenclature for clinical management.
Main Methods:
- Review of gross and histopathologic findings in cardiac amyloidosis.
- Analysis of direct and indirect amyloid typing techniques.
- Examination of current nomenclature standards for reporting.
Main Results:
- Cardiac amyloidosis diagnosis requires more than visual identification of amyloid.
- Accurate typing of deposited proteins is essential for modern pharmacotherapies.
- Standardized reporting improves communication between pathologists and clinicians.
Conclusions:
- Precise amyloid typing is critical for effective treatment of cardiac amyloidosis.
- Advanced diagnostic workup is necessary to guide protein-specific therapies.
- Clear nomenclature ensures accurate diagnosis and patient management.
Abstract:
Amyloidosis is an increasingly recognized cause of heart disease, caused by the deposition of misfolded protein within the heart. These proteins may deposit systemically and include the heart or deposit only within the heart muscle itself. In either case, cardiac symptoms may be the primary manifestation. The diagnosis is usually made by the pathologist identifying amyloid within a tissue sample. The diagnosis, however, does not end with such visual recognition of the presence of amyloid. Newer generation pharmacotherapeutic agents that are protein specific necessitate a closer evaluation to determine the type of protein being deposited and accurately conveying this to the treating clinician. Herein, the gross and histopathologic features of cardiac amyloidosis are reviewed along with a review of amyloid typing strategies (both direct and indirect) that may be employed in the diagnostic workup as well as the nomenclature standards for reporting.
More Related Videos
Related Concept Videos
Cardiomyopathy I: Introduction and Classification
Amyloid Fibrils
Amyloid Fibrils
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Cardiomyopathy III: Hypertrophic Cardiomyopathy
Cardiomyopathy IV: Restrictive Cardiomyopathy
Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations

