Fibromyalgia Syndrome | Palpitations and Tachycardia in Fibromyalgia Syndrome

Fibromyalgia Syndrome research study

What is the primary objective of this study?

Clinically Characterized by the presence of chronic widespread pan and tenderness, Fibromyalgia (FM) is one of the most common \"functional\" syndromes. FM is currently conceived of as representing a prototype of central pain, i.e. a condition in which sensitization of the central nervous system results in a overall increase in the processing of painful stimuli, as well as an impairment of pain inhibition. This condition is responsible for significant a social and economic burden and is estimated to affect up to 5% of all women. The 1990 American College of Rheumatology (ACR) classification criteria for FM are the current standard for studying FM, and require the presence of widespread pain lasting over 3 months, as well as documentation of tenderness in at least 11 of 18 pre-defined \"tender points. Multiple additional symptoms, which are not part of the classification criteria, include among others sleep disturbances, mood disturbances, cognitive dysfunction, vulvodynia, dysmenorrhea, sexual dysfunction and weight fluctuations. In addition, FM is well known to overlap both clinically and epidemiologically with an ever increasing number of other \"functional\" disorders, including irritable bowel syndrome (IBS), Temporomandibular joint disorder (TMJD), functional dyspepsia etc. In addition to the central symptom of pain, FM patients frequently complain of non- specific symptoms which are potentially autonomically - mediated. Thus, palpitations, fatigue and inability to stand for long periods of time are all common complaints. About 80-90 percent of FM patients have one or more symptoms associated with autonomic dysfunction. The most common of them is presyncope (62.5%), followed by syncope (12.5%), palpitations on standing (12.5%) and dizziness (12.5%) (14). Some of these symptoms overlap with those of the postural tachycardia syndrome (POTS). POTS is a common dysautonomia, characterized by remarkable increased heart rate during the assumption of the upright posture (>30 bpm). According to our experience, FM is found, at least, in 15% of POTS patients. But, no data exists about the incidence of POTS in patients with FM.The role of the autonomic nervous system (ANS) in initiating and maintaining the syndrome of FM has been studies (and debated) over the last decade. The ANS is an extremely complex system, regulating involuntary body functions, including heart rate, intestinal motility, urination, and sexual activity, among many other variables. Notably, the vagus has an inhibitory effect on pain. Deterioration in the vagal control is \"associated\" with increased pain sensation. Previous studies have indicated that FM patients may have an increase in sympathetic control over the cardiovascular system with a reciprocal decrease in parasympathetic control. High sympathetic tone is usually associated with a lower threshold to pain. But, the contribution of the ANS to the pathogenesis of FM syndrome remains unclear. Evidently, the ANS interacts with other components of the CNS in the pathogenesis of FM, including pain processing centers in the thalamus and amygdala, as well as with the hypothalamic-pituitary-adrenal (HPA) axis.

Who is eligible to participate?

Inclusion Criteria: - ACR 1990 criteria for fibromyalgia: widespread pain lasting 3 months - Tenderness in 11 of 18 points Exclusion Criteria: - Unable to provide informed concent - Known tachyarrhythmia

Which medical condition, disease, disorder, syndrome, illness, or injury is researched?

Fibromyalgia Syndrome

Study Interventions

Interventions can include giving participants drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available or noninvasive approaches such as surveys, education, and interviews.

Other:Evaluation of autonomic parametersPhysical examination, ECG, Loop recorder, Heart rate variability evaluation

Study Arms

Research studies and clinical trials typically have two or more research arms. An arm is a group of people who receive the same treatment in the study.

Patients diagnosed with Fibromyalgia

Study Status

Unknown status

Start Date: July 2010

Completed Date: June 2012


Type: Observational


Primary Outcome:

Secondary Outcome:

Study sponsors, principal investigator, and references

Principal Investigator:

Lead Sponsor: Tel-Aviv Sourasky Medical Center


More information:

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