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Published in: Clinical Autonomic Research 6/2009

01-12-2009 | Research Article

Fatigue and autonomic dysfunction in non-alcoholic fatty liver disease

Authors: Julia L. Newton, Jessie Pairman, Katharine Wilton, David E. J. Jones, Christopher Day

Published in: Clinical Autonomic Research | Issue 6/2009

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Abstract

Background

Fatigue is a significant symptom in non-alcoholic fatty liver disease (NAFLD) that impacts upon quality of life and is unrelated to liver disease severity. We examined the relationship between parameters of blood pressure regulation with perception of fatigue in NAFLD.

Methods

Thirty-four non-diabetic subjects with histologically proven, non-cirrhotic NAFLD (26 [77%] males and 8 [23%] females) (mean ± SD age 54 ± 11) and 34 age, sex and BMI matched non-diabetic controls underwent subjective and objective evaluation of cardiovascular autonomic function (24 h blood pressure and head up tilt testing). All subjects completed the fatigue impact scale.

Results

The NAFLD group had significantly higher autonomic symptom burden assessed using the orthostatic grading scale (OGS) compared to controls (4 ± 4 vs. 1 ± 2; p = 0.0003). Increasing orthostatic symptoms correlated with increasing fatigue (p = 0.006; r 2 = 0.3). Fatigue in NAFLD correlated inversely with 24 h measurement of systolic, diastolic and mean blood pressures (all p < 0.03; r 2 = 0.2). This relationship was predominantly related to lower blood pressure at night (p < 0.003; r 2 = 0.3). On head up tilt testing 57% of the NAFLD group had neurally-mediated hypotension (vasovagal syncope and/or orthostatic hypotension) (p = 0.006 compared to controls). The degree of blood pressure drop in response to standing correlated with fatigue severity (p = 0.008; r 2 = 0.3) and the autonomic symptom burden (OGS) (p = 0.03; r 2 = 0.2).

Conclusion

Autonomic symptoms are prevalent in NAFLD and associate with objective measures of autonomic dysfunction. Fatigue in NAFLD is associated with lower blood pressure and autonomic dysfunction. Studies are needed to determine whether this is a potential therapeutic target for fatigue in NAFLD.
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Metadata
Title
Fatigue and autonomic dysfunction in non-alcoholic fatty liver disease
Authors
Julia L. Newton
Jessie Pairman
Katharine Wilton
David E. J. Jones
Christopher Day
Publication date
01-12-2009
Publisher
D. Steinkopff-Verlag
Published in
Clinical Autonomic Research / Issue 6/2009
Print ISSN: 0959-9851
Electronic ISSN: 1619-1560
DOI
https://doi.org/10.1007/s10286-009-0031-4

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