This a condition in which Vitamin B1 (also known as thiamine) is chronically lacking in the diet. The typical patient that chronically lacks thiamine is someone who eats polished rice. That is, the outer vitamin-rich husk is removed. Another group that may suffer from beriberi are patients who have undergone bariatric surgery.
There are two types of beriberi- wet and dry. Wet beriberi signs include edema of the extremities. Dry signs are emaciation and peripheral neuropathy.
Both may lead to right heart failure or xerostomia (dryness of the mouth).