a medical term which means a deficiency but not a total lack of oxygen
Hypoxia (medical) Hypoxia differs from hypoxemia and anoxemia in that hypoxia refers to a state in which oxygen supply is insufficient, whereas hypoxemia and anoxemia refer specifically to states that have low or zero arterial oxygen supply.[3] Hypoxia in which there is complete deprivation of oxygen supply is referred to as anoxia.
Thiamine deficiency Thiamine deficiency is a medical condition of low levels of thiamine (vitamin B1).[1] A severe and chronic form is known as beriberi.[1][5] There are two main types in adults: wet beriberi, and dry beriberi.[1] Wet beriberi affects the cardiovascular system resulting in a fast heart rate, shortness of breath, and leg swelling.[1] Dry beriberi affects the nervous system resulting in numbness of the hands and feet, confusion, trouble moving the legs, and pain.[1] A form with loss of appetite and constipation may also occur.[3] Another type, acute beriberi, is found mostly in babies and presents with loss of appetite, vomiting, lactic acidosis, changes in heart rate, and enlargement of the heart.[6]