Chronic hepatitis C virus infection associated with autonomic dysfunction.

Area of Science:

• Cardiology
• Hepatology
• Autonomic Neuroscience

Background:

• Impaired autonomic function is a poor prognostic indicator in chronic liver diseases.
• The specific impact of chronic hepatitis C virus (HCV) infection on the autonomic nervous system is not well understood.

Purpose of the Study:

• To compare cardiovagal autonomic function in patients with chronic HCV infection and healthy controls.
• To examine the relationship between autonomic function and serum markers (aminotransferases, HCV RNA, cryoglobulins, albumin, glucose) in HCV patients.

Main Methods:

• Assessed autonomic function using spontaneous baroreflex sensitivity (BRS) and heart rate variability (HRV) indices in 45 treatment-naïve HCV patients and 40 healthy controls.
• Measured R-R intervals via electrocardiogram and continuous radial artery pressure via applanation tonometry.
• Performed laboratory analyses and quantitative polymerase chain reaction for serum HCV RNA levels.

Main Results:

• HCV patients exhibited significantly lower BRS and HRV indices compared to healthy controls (P<0.01).
• Multivariate analysis revealed that autonomic dysfunction in HCV-infected patients correlated with elevated alanine aminotransferase levels.
• Autonomic dysfunction was not associated with serum HCV RNA levels or cryoglobulins.

Conclusions:

• Chronic HCV infection appears to cause impaired autonomic function.
• Further research is required to elucidate the specific mechanisms underlying this autonomic dysfunction in HCV.