Table 1

Controlled heart rate variability analyses in patients with fibromyalgia

Reference
Number of patients
Number of controls
Duration of heart rate variability analysis
Main conclusion

Martinez-Lavin and colleagues, 1998 [11]
30 women
30 women
24 hours
Sympathetic hyperactivity
Cohen and colleagues, 2000 [12]
22 women
22 women
20 minutes
Sympathetic hyperactivity
Raj and colleagues, 2000 [13]
17 women
14 women
24 hours
Sympathetic hyperactivity
Cohen and colleagues, 2001 [14]
19 men
19 men
20 minutes
Sympathetic hyperactivity
Stein and colleagues, 2004 [15]
26 (19 women, 7 men)
36 (18 women, 18 men)
24 hours
Sympathetic hyperactivity in women, not in men
Furlan and colleagues, 2005 [16]
16 women
16 women
30 minutes
Sympathetic hyperactivity
Ulas and colleagues, 2006 [17]
34 women
22 women
30 minutes
Sympathetic hyperactivity

Martinez-Lavin Arthritis Research & Therapy 2007 9:216   doi:10.1186/ar2146