Table 1 Controlled heart rate variability analyses in patients with fibromyalgia
From: Biology and therapy of fibromyalgia. Stress, the stress response system, and 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 |