[An elderly patient with beriberi].

An 82-year-old man was admitted to the hospital in the summer of 1995 due to dyspnea, peripheral edema, and a tingling sensation and muscle weakness in all extremities. Physical examination showed heart failure and polyneuropathy. Laboratory data showed a low concentration of vitamin B1 (10 ng/ml normal 23.8-45.9 ng/ml) and a low level of erythrocyte transketolase activity (0.58 IU/gHb normal 0.75-1.30 IU/gHb). A chest X-ray film revealed cardiomegaly (cardiothoracic ratio 57.1%) and ultrasonic cardiography revealed increased motion of the left ventricle. A diagnosis of beriberi was made. The disease in this case may have been caused by hard work in the summer heat. The patient was treated with thiamine and his symptoms and signs resolved within a few weeks. A search of the literature revealed no previous report of beriberi in a patient of this age, but reports of beriberi in older patients in Japan are more common now than in previous years. Beriberi should be included in the differential diagnosis of polyneuropathy in elderly patients.