Fundamentals of Light Chain Cardiac Amyloidosis: A Focused Review
Azka Latif1, Noman Lateef1, Faryal Razzaq2
1Creighton University Medical Center, Omaha, Nebraska, NE, 68178, United States.
Insights
Cardiac amyloidosis, a rare condition, is often overlooked in heart failure diagnosis. Early physician education and consideration as a differential diagnosis are crucial for improved patient outcomes.
Area of Science:
- Cardiology
- Oncology
- Pathology
Background:
- AL amyloidosis affects 8-12 per million in the US, frequently involving the heart.
- Cardiac involvement in AL amyloidosis leads to poor prognosis despite advanced treatments.
- It's often missed as a cause of heart failure with preserved ejection fraction, delaying diagnosis and treatment.
Purpose of the Study:
- To review advances in diagnosing and managing cardiac amyloidosis.
- To educate primary care physicians on recognizing and managing this condition.
- To emphasize cardiac amyloidosis as a critical differential diagnosis for heart failure.
Main Methods:
- Review of pathogenesis, association with plasma cell dyscrasias.
- Summary of novel diagnostic techniques: echocardiography, cardiac MRI, histopathology, biomarkers.
- Overview of treatment strategies: supportive care, chemotherapy, palliative care.
Main Results:
- AL amyloidosis diagnosis is often delayed due to its subtle presentation.
- Multisystem involvement is common, impacting prognosis.
- Current management strategies offer limited survival benefits, highlighting the need for early intervention.
Conclusions:
- Physician education is vital to improve early diagnosis of cardiac amyloidosis.
- A comprehensive diagnostic approach including imaging and biomarkers is recommended.
- Integrated care, including palliative and hospice options, is essential for managing this poor-prognosis disease.
Abstract:
The estimated prevalence of AL CA in the US is approximately 8-12 cases per million. Almost 30-50% diagnosed cases of AL amyloid in the US have multisystem involvement, including cardiac involvement. Even with the availability of advanced diagnostic testing and novel therapies, prognosis remains poor. It is overlooked as a cause of heart failure with preserved ejection fraction leading to a delay in diagnosis when management options are limited and associated with poor survival outcomes. Therefore, the education of physicians is needed to ensure that it would be highly considered as a differential diagnosis. The purpose of this manuscript is to review the advances in the diagnosis and management of cardiac amyloidosis with the aim of educating colleagues who provide care in the primary care setting. We have summarized the pathogenesis of amyloidosis, its association with plasma cell dyscrasias, novel diagnostic and surveillance approaches including echocardiography, cardiovascular magnetic resonance imaging, histopathologic techniques, systemic biomarkers, and advanced treatment approaches including supportive symptomatic management and standard of care chemotherapy targeting the amyloid deposits. Given the overall poor prognosis of amyloidosis, we have also discussed the role of palliative and hospice care.
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