Asterixis in Liver Cirrhosis: Causes, Symptoms & Prognosis

Asterixis

Asterixis, also known as flapping tremor, is an involuntary, brief, intermittent loss of muscle tone that affects the distal part of the upper limbs. It is characterized by a sudden, brief, and irregular jerking movement of the hands, typically the wrists and fingers, causing them to momentarily drop or deviate to the side.

Asterixis is most commonly associated with hepatic encephalopathy, a condition that occurs when the liver is severely damaged and unable to adequately remove toxins from the blood. This condition is typically seen in people with cirrhosis, a chronic liver disease characterized by scarring and impaired liver function.

In hepatic encephalopathy, the accumulation of toxins, such as ammonia, in the bloodstream affects the brain's function and leads to various neurological abnormalities, including asterixis. It is thought that the toxins interfere with the normal function of the neurons responsible for controlling muscle tone and coordination.

Asterixis is often used as a clinical sign to assess the severity of hepatic encephalopathy and monitor the progression of liver disease. The presence of asterixis indicates a compromised level of consciousness and the need for prompt medical attention to address the underlying liver condition.