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lüll Cardiac amyloidosis: heterogenous pathogenic backgrounds Ikeda SIntern Med 2004[Dec]; 43 (12): 1107-14Cardiac amyloidosis is a fatal disorder which develops on the basis of the different pathologic conditions in systemic amyloidosis: the most common underlying disease is immunoglobulin light chain-derived primary amyloidosis and the next is transthyretin-related hereditary amyloidosis; the latter disorder, typically represented by familial amyloid polyneuropathy, was long regarded as an endemic disease. However, this disorder has now been shown to involve a highly variable clinical picture due to a large number of transthyretin gene mutations, and many patients with diverse ancestors suffer from severe cardiac amyloidosis. Additionally, senile systemic amyloidosis is now noted as a cause of cardiac dysfunction in elderly individuals. Echocardiogram and myocardial technetium-99m-pyrophosphate scintigraphy can provide characteristic findings. Immunohistochemistry on tissue amyloid, biochemical analysis of serum and urine proteins, and DNA sequencing are usually employed to determine the disease-related amyloid fibril protein. Although systemic amyloidosis has become treatable, the prognosis of each patient who received up-to-date and effective, but nevertheless stressful, therapy depends on the severity of cardiac involvement by amyloid deposition.|*Amyloidosis/classification/diagnosis/therapy[MESH]|*Cardiomyopathies/diagnosis/therapy[MESH]|Amyloidosis, Familial/diagnosis/therapy[MESH]|Humans[MESH] |