Dysautonomia in chronic fatigue syndrome: facts, hypotheses, implications

Abstract:

The diagnosis of chronic fatigue syndrome (CFS) is based on patient history and treatment on cognitive behavior therapy and graded exercise. There is increasing evidence that dysautonomia occurs in CFS manifest primarily as disordered regulation of cardiovascular responses to stress. We impart our experience relating to diagnosis, monitoring, and treatment of CFS based on identification and management of dysautonomia.

Recently proposed methods for assessment of the cardiovascular reactivity, the ‘hemodynamic instability score’ (HIS) and the ‘Fractal and Recurrence Analysis-based Score’ (FRAS), served for this purpose. On HUTT, a particular dysautonomia is revealed in CFS patients that differ from dysautonomia in several other disorders. This distinct abnormality in CFS can be identified by HIS >-0.98 (sensitivity 84.5% and specificity 85.1%) and FRAS > +0.22 (sensitivity 70% and specificity 88%). Therefore, the HIS and FRAS may be used, in the appropriate clinical context, to support the diagnosis of CFS, which until now, could only be subjectively inferred.

A pilot study suggested that midodrine treatment, directed at the autonomic nervous system in CFS, results first in correction of dysautonomia followed by improvement of fatigue. This finding implies that dysautonomia is pivotal in the pathophysiology CFS, at least in a large part of the patients, and that manipulating the autonomic nervous system may be effective in the treatment of CFS.

 

Source: Naschitz JE, Yeshurun D, Rosner I. Dysautonomia in chronic fatigue syndrome: facts, hypotheses, implications. Med Hypotheses. 2004;62(2):203-6. http://www.ncbi.nlm.nih.gov/pubmed/14962627

 

Patient power and control: a study of women with uncertain illness trajectories

Abstract:

The authors interviewed 12 women diagnosed with chronic fatigue syndrome and 13 with fibromyalgia with the aim of determining the strategies they perceive themselves as using to gain control over their situation during the health care process. The results highlight various strategies that the women report applying to find a way of managing the illness and to influence caregivers. They describe, for example, how they try to gain control over their situation by acquiring knowledge about the illness. The women also describe various power strategies they use in their interaction with the caregivers to take command of their situation, namely exiting, noncompliance, confrontation, persuasion/insistence, making demands, and demonstrative distancing.

 

Source: Asbring P, Närvänen AL. Patient power and control: a study of women with uncertain illness trajectories. Qual Health Res. 2004 Feb;14(2):226-40. http://www.ncbi.nlm.nih.gov/pubmed/14768459

 

Developing and evaluating community-based services through participatory action research: two case examples

Abstract:

Occupational therapy has a strong history of embracing concepts of client empowerment. However there is limited literature in the field on how to achieve empowerment, or on how to extend empowerment to the level of the community and social groups and services within it.

This article discusses how concepts and strategies of participatory action research, an extension of empowerment theory, can be used to inform service development and evaluation in occupational therapy. The participatory action research approach is illustrated using two case examples of participatory action research programs for persons with chronic fatigue syndrome and individuals with autoimmune deficiency syndrome (AIDS). A critical analysis of the application of this approach to research and practice is provided. Finally, the paper identifies key principles of participatory action research that can be used to guide occupational therapy services and empower both individuals and communities.

 

Source: Taylor RR, Braveman B, Hammel J. Developing and evaluating community-based services through participatory action research: two case examples. Am J Occup Ther. 2004 Jan-Feb;58(1):73-82. http://www.ncbi.nlm.nih.gov/pubmed/14763638

 

Quality of life and symptom severity for individuals with chronic fatigue syndrome: findings from a randomized clinical trial

Abstract:

OBJECTIVE: Chronic fatigue syndrome is a profoundly disabling condition characterized by severe, unrelenting fatigue and a number of other physical and cognitive symptoms. Currently, there is no cure or widely accepted treatment for chronic fatigue syndrome, and few rehabilitation programs exist to address quality of life issues in chronic fatigue syndrome. In the present randomized clinical trial, the effects of an integrative, consumer-driven rehabilitation program on quality of life and symptom severity for individuals with chronic fatigue syndrome were examined.

METHOD: Forty-seven participants were randomly assigned to either an immediate program group (n = 23) or a delayed program control group (n = 24) and assessed with the Chronic Fatigue Syndrome Symptom Rating Scale and the Quality of Life Index before the program, after program participants completed the group phase, and after program participants completed the one-on-one phase. It was hypothesized that the program would lead to improvements in quality of life and an overall reduction in symptom severity.

RESULTS: Linear growth models were estimated comparing program and control conditions over time using random-effects regression analyses. Significant condition by time interactions were observed for the main outcomes of symptom severity and overall quality of life. Effect sizes for these interactions involving symptom severity (Cohen’s d = 0.71) and overall quality of life (Cohen’s d = .66) were moderate.

CONCLUSIONS: Findings indicate that consumer driven programs such as this one can have a positive impact on symptom severity and quality of life over time for individuals with chronic fatigue syndrome.

 

Source: Taylor RR. Quality of life and symptom severity for individuals with chronic fatigue syndrome: findings from a randomized clinical trial. Am J Occup Ther. 2004 Jan-Feb;58(1):35-43. http://www.ncbi.nlm.nih.gov/pubmed/14763634

 

Identification of masqueraders of autoimmune disease in the office

Abstract:

There are several rheumatologic and autoimmune disorders that can masquerade as allergic disease. Identification of these conditions in an office setting can be a challenge for the practicing allergist-immunologist. These conditions include rheumatoid and juvenile arthritis, Sjogren’s syndrome, systemic lupus erythematosus, Behcet’s and antiphospholipid syndromes, systemic sclerosis, vasculitis, sarcoidosis, chronic fatigue syndrome, and fibromyalgia. The article will address these topics and include clinical uses of immunologic tests for diagnosis.

 

Source: Frieri M. Identification of masqueraders of autoimmune disease in the office. Allergy Asthma Proc. 2003 Nov-Dec;24(6):421-9. http://www.ncbi.nlm.nih.gov/pubmed/14763244

 

Regional distribution of fatiguing illnesses in the United States: a pilot study

Abstract:

BACKGROUND: Chronic fatigue syndrome (CFS) is a debilitating illness with no known cause or effective therapy. Population-based epidemiologic data on CFS prevalence are critical to put CFS in a realistic context for public health officials and others responsible for allocating resources.

METHODS: We conducted a pilot random-digit-dialing survey to estimate the prevalence of fatiguing illnesses in different geographic regions and in urban and rural populations of the United States. This report focuses on 884 of 7,317 respondents 18 to 69 years old. Fatigued (440) and randomly selected non-fatigued (444) respondents completed telephone questionnaires concerning fatigue, other symptoms, and medical history.

RESULTS: We estimated 12,186 per 100,000 persons 18 to 69 years of age suffered from fatigue lasting for at least 6 months (chronic fatigue), and 1,197 per 100,000 described an illness that, though lacking clinical evaluation, met criteria for CFS (CFS-like). Chronic fatigue and CFS-like illness were more common in rural than in urban populations, although the differences were not significant. The prevalence of these fatiguing illnesses did not differ meaningfully among the four regions surveyed, and no significant geographic trends were observed.

CONCLUSIONS: This investigation estimated that nearly 2.2 million American adults suffer from CFS-like illness. The study also suggested the need to focus future investigations of fatigue on populations with lower incomes and less education. There was no evidence for regional differences in the occurrence of fatiguing illnesses.

 

Source: Bierl C, Nisenbaum R, Hoaglin DC, Randall B, Jones AB, Unger ER, Reeves WC. Regional distribution of fatiguing illnesses in the United States: a pilot study. Popul Health Metr. 2004 Feb 4;2(1):1. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC356930/ (Full article)

 

Neuroendocrine aspects of chronic fatigue syndrome

Abstract:

Chronic fatigue syndrome (CFS) is a serious health concern affecting over 800000 Americans of all ages, races, socioeconomic groups and genders. The etiology and pathophysiology of CFS are unknown, yet studies have suggested an involvement of the neuroendocrine system. A symposium was organized in March 2001 to explore the possibility of an association between neuroendocrine dysfunction and CFS, with special emphasis on the interactions between neuroendocrine dysfunction and other abnormalities noted in the immune and autonomic nervous systems of individuals with CFS. This paper represents the consensus of the panel of experts who participated in this meeting.

Copyright 2004 S. Karger AG, Basel

 

Source: Papanicolaou DA1, Amsterdam JD, Levine S, McCann SM, Moore RC, Newbrand CH, Allen G, Nisenbaum R, Pfaff DW, Tsokos GC, Vgontzas AN, Kales A. Neuroendocrine aspects of chronic fatigue syndrome. Neuroimmunomodulation. 2004;11(2):65-74. http://www.ncbi.nlm.nih.gov/pubmed/14758052

 

Patient education to encourage graded exercise in chronic fatigue syndrome. 2-year follow-up of randomised controlled trial

Abstract:

BACKGROUND: An earlier trial demonstrated good outcomes after 1 year for patients with chronic fatigue syndrome (CFS) who received an educational intervention designed to encourage graded activity.

AIMS: To determine 2-year outcomes for the same treated patients and the response to treatment of patients formerly in the control condition.

METHOD: Patients in the treatment groups (n=114) were followed up at 2 years; 32 patients from the control group were offered the intervention after 1 year and were assessed 1 year later. Assessments were the self-rated measures used in the original trial.

RESULTS: At 2 years 63 of the treated patients (55%) no longer fulfilled trial criteria for CFS compared with 64 patients (56%) at 1 year. Fourteen of 30 crossover patients (47%) achieved a good outcome at 1 year and seven (23%) no longer fulfilled criteria for CFS.

CONCLUSIONS: Benefits of the intervention were maintained at 2 years. Delaying treatment is associated with reduced efficacy and required more intensive therapy.

 

Source: Powell P, Bentall RP, Nye FJ, Edwards RH. Patient education to encourage graded exercise in chronic fatigue syndrome. 2-year follow-up of randomised controlled trial. Br J Psychiatry. 2004 Feb;184:142-6. http://www.ncbi.nlm.nih.gov/pubmed/14754826

 

Salivary cortisol response to awakening in chronic fatigue syndrome

Abstract:

BACKGROUND: There is accumulating evidence of hypothalamic-pituitary-adrenal (HPA) axis disturbances in chronic fatigue syndrome (CFS). The salivary cortisol response to awakening has been described recently as a non-invasive test of the capacity of the HPA axis to respond to stress. The results of this test correlate closely with those of more invasive dynamic tests reported in the literature; furthermore, it can be undertaken in a naturalistic setting.

AIMS: To assess the HPA axis using the salivary cortisol response to awakening in CFS.

METHOD: We measured salivary cortisol upon awakening and 10, 20, 30 and 60 min afterwards in 56 patients with CFS and 35 healthy volunteers.

RESULTS: Patients had a lower cortisol response to awakening, measured by the area under the curve.

CONCLUSIONS: This naturalistic test of the HPA axis response to stress showed impaired HPA axis function in CFS.

 

Source: Roberts AD, Wessely S, Chalder T, Papadopoulos A, Cleare AJ. Salivary cortisol response to awakening in chronic fatigue syndrome. Br J Psychiatry. 2004 Feb;184:136-41. http://bjp.rcpsych.org/content/184/2/136.long (Full article)

 

Working memory deficits in chronic fatigue syndrome: differentiating between speed and accuracy of information processing

Abstract:

To examine the relative influence of speed of information processing versus working memory ability, CFS participants with psychiatric comorbidity (CFS-Psych) and CFS without a psychiatric history (CFS-noPsych) were examined on tests of visual and auditory processing speed and visual and auditory working memory.

Compared to healthy controls (HC) and a group of participants with rheumatoid arthritis (RA), the CFS-noPsych group displayed significantly reduced performance on tests of information processing speed, but not on tests of working memory. No significant differences were observed between the CFS-Psych group and any other group in the study. The implications of group heterogeneity on the understanding of cognitive impairment in CFS are discussed.

 

Source: Deluca J, Christodoulou C, Diamond BJ, Rosenstein ED, Kramer N, Natelson BH. Working memory deficits in chronic fatigue syndrome: differentiating between speed and accuracy of information processing. J Int Neuropsychol Soc. 2004 Jan;10(1):101-9. http://www.ncbi.nlm.nih.gov/pubmed/14751012