pmc logo imageJournal ListSearchpmc logo image
Logo of openneurojJournal URL: redirect3.cgi?&&auth=0ToqoYsInKjeT3_r1t2bLaY76AKB9apjHNToGAk98&reftype=publisher&article-id=2577935&issue-id=173470&journal-id=680&FROM=Article|Banner&TO=Publisher|Other|N%2FA&rendering-type=normal&&http://bentham.org/open/toneuj/
Open Neurol J. 2008; 2: 12–19.
Published online 2008 May 7. doi: 10.2174/1874205X00802010012.
PMCID: PMC2577935
Evaluation of the Autonomic Nervous System Using the FAN® Device – Range of Normal and Examples of Abnormal
S Haegele-Link,*1 D Claus,2 S Dücker,3 T Vogt,3 and F Birklein3
1Department of Neurology, Kantonsspital St Gallen, Switzerland
2Department of Neurology, Hospital of Darmstadt, Germany
3Department of Neurology, University of Mainz, Germany
*Address correspondence to this author at the Department of Neurology, Kantonsspital St Gallen, Switzerland; E-mail: stefan.haegele-link/at/kssg.ch
Received February 14, 2008; Revised March 11, 2008; Accepted April 9, 2008.
Abstract
Different components of the autonomic nervous system may be affected by different disorders to varying degrees. The aim of this study is to report first experiences with a new device (FAN®, Schwarzer, Germany) which measures heart rate variability (HRV), sympathetic skin responses (SSR) and the pulse wave transit time (PTT). We examined 190 healthy volunteers (102 men, 88 women) and in 89 subjects (46 men, 43 women) PTT during VM was investigated. In a subset of 24 subjects PTT was compared to conventional blood pressure recording. Thereafter, normal data were compared to patients with polyneuropathy (PNP) and Parkinson syndromes. All parameters of HRV decreased with age. 6 parameters for HRV at rest, during deep respiration and the valsalva ratio were reclassified into three age categories: under 40 (n=96), 40 – 60 (n=71) and 60 or older (n=23). Applying the lower limits of normal (5%-tile) subjects did not have more than 2 of these 6 parameters in the pathological range PTT reduction during phase IV of the valsalva manoeuvre was greater than 7.7 ms (5%-tile) but not age dependent. Patients with PNP had reduced HRV and SSR, Parkinson patients had more frequently impaired blood pressure regulation according to PTT assessment. Our investigation shows that the FAN® might be useful for clinicians to detect autonomic disorders.