Beriberi is a clinical condition resulting from a severe deficiency of vitamin B1 (thiamine). Thiamine is essential for carbohydrate metabolism, as it serves as a coenzyme for pyruvate dehydrogenase, which is crucial in the energy production process.
Wet Beriberi
- Involvement: Primarily affects the cardiovascular system.
- Key Features:
- High-output heart failure
- Tachycardia
- Peripheral edema
- Hypotension
- Symptoms of shock in severe cases
- Pathophysiology: Thiamine deficiency impairs pyruvate metabolism, leading to lactic acid buildup, which places strain on the heart and circulatory system.
Dry Beriberi
- Involvement: Primarily affects the nervous system.
- Key Features:
- Peripheral neuropathy
- Muscle weakness
- Difficulty walking
- Loss of reflexes
- In advanced cases, may result in Wernicke-Korsakoff syndrome (neurological disorder).
- Pathophysiology: Thiamine deficiency decreases ATP production, leading to nerve damage, muscle weakness, and impaired motor control.
Wernicke-Korsakoff Syndrome
- a severe form of Dry Beriberi
- Caused predominantly in alcoholics, where thiamine absorption and utilization are impaired.
- Symptoms include:
- Wernicke’s Encephalopathy: Characterized by confusion, ataxia (lack of muscle coordination), and ophthalmoplegia (eye movement abnormalities).
- Korsakoff Psychosis: Chronic neurological disorder causing memory loss, confusion, and confabulation (making up stories).