Asterixis: a study of 103 patients

Area of Science:

• Neurology
• Clinical Neuroscience

Background:

• Asterixis, initially linked to hepatic encephalopathy in 1949, is now recognized in broader encephalopathies and structural brain lesions.
• Understanding the prevalence and varied etiologies of asterixis in a general neurology setting is crucial.

Purpose of the Study:

• To investigate the incidence, causes, and patterns of asterixis in a general neurology clinic and inpatient consultation service.
• To analyze the clinical presentation of asterixis across different patient populations.

Main Methods:

• Prospective data collection over 12 months on inpatients and clinic patients.
• Systematic recording of asterixis findings, including laterality and elicitation patterns.
• Analysis of 103 patients with adequate data, considering varied causes and presentations.

Main Results:

• Asterixis was documented in 97 of 1,109 inpatients (8.8%) and 6 of 614 outpatients (1%).
• Of the 97 inpatient cases, 18.6% were unilateral and 81.4% were bilateral.
• Identified causes included medications, renal disorder, hepatic dysfunction, pulmonary insufficiency, stroke, and various brain lesions.

Conclusions:

• Asterixis is a significant sign in neurology clinics, associated with a wide spectrum of underlying pathologies beyond hepatic dysfunction.
• The varied patterns of asterixis, including unilateral presentations, highlight the complexity of its pathophysiology.
• Further research into the historical context and terminology of asterixis can enhance clinical understanding.