Abstract
Carcinoids are rare tumors arising from neuroendocrine cells that can produce and secrete hormones. Carcinoid disease may include cardiac involvement, with right-sided endocardial and valvular fibrous lesions of the heart.1 This so-called carcinoid heart disease may present with cardiac failure and arrhythmias. More uncommonly, myocardial metastases are diagnosed in carcinoid disease. The reported incidence of myocardial carcinoid metastases among patients with metastatic carcinoid disease is 4%.2 These metastases usually are discovered during screening for distant metastatic disease or carcinoid heart disease but also may present with arrhythmias. However, the incidence may be underestimated as a consequence of limited resolution of the imaging techniques used. In the past, myocardial metastases have been located with ultrasonography and somatostatin receptor scintigraphy (SRS). Lesions <1.0 cm are difficult to identify with ultrasonography, and although good sensitivity (92%) has been reported for SRS, it is …
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