ArticleThe Egyptian heart journal : (EHJ) : official bulletin of the Egyptian Society of Cardiology2026
Silent progression: cardiac amyloidosis unmasking IgG lambda myeloma in an elderly patient.
Article in The Egyptian heart journal : (EHJ) : official bulletin of the Egyptian Society of Cardiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundCardiac amyloidosis is an underrecognized etiology of heart failure with preserved ejection fraction (HFpEF), particularly in elderly patients. Light-chain (AL) amyloidosis, when associated with multiple myeloma, is highly aggressive and portends a poor prognosis, especially in advanced cardiac stages. CASE PRESENTATION: We report the case of a 79-year-old male with type 2 diabetes, hypertension, and a history of pacemaker implantation for complete atrioventricular block in the context of atrial fibrillation. He was admitted with progressive exertional dyspnea and an episode of syncope. Clinical examination revealed fine basal crackles and signs of decompensated heart failure. ECG demonstrated a paced rhythm. Echocardiography and cardiac MRI revealed concentric left ventricular hypertrophy with a sparkling myocardial texture, biatrial dilation, restrictive filling pattern, and diffuse subendocardial late gadolinium enhancement-features highly suggestive of cardiac amyloidosis. Laboratory tests revealed anemia, nephrotic syndrome, elevated troponin and NT-proBNP, and a monoclonal IgG lambda spike. Renal biopsy demonstrated amyloid deposits with Congo red positivity and light-chain (lambda) restriction, confirming the diagnosis of AL amyloidosis. Bone marrow biopsy confirmed the diagnosis of multiple myeloma with plasma cell infiltration. Based on clinical and laboratory findings, the patient was classified as Mayo stage IIIB AL cardiac amyloidosis and ISS stage I multiple myeloma. He received bortezomib-cyclophosphamide-based chemotherapy and supportive care, but unfortunately died five months after diagnosis. DISCUSSION: This case highlights the importance of early recognition of cardiac amyloidosis in elderly patients with unexplained heart failure and monoclonal gammopathy. Echocardiography plays a pivotal role in early disease suspicion, particularly in resource-limited settings, while cardiac MRI serves as a complementary tool for assessing myocardial involvement. Despite advances in treatment, outcomes remain poor in advanced cardiac involvement. Early intervention may improve prognosis, underscoring the need for heightened clinical awareness.
conclusionInfiltrative cardiomyopathies like AL amyloidosis should be considered in elderly patients with heart failure and systemic red flags. Timely diagnosis and multidisciplinary management are essential but often insufficient in advanced stages.
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