Obsessive Compulsive Disorder (OCD) is a condition associated with recurrent intrusive distressing thoughts, images and urges compelling the person to perform neutralizing acts or thoughts to the extent of significantly interfering with their daily activities. The symptoms of OCD are associated with both subjective and objective signs of distress. Psychophysiological studies of OCD and other anxiety disorders often report abnormal sympathovagal balance with decreased parasympathetic or vagal tone and increased sympathetic tone (Hoehn-Saric et al 1995, Broderick et al 2013, Kawano et al 2012, Pittig et al 2013, Buhlmann et al 2007, Blechert et al 2007, Friedman and Thayer 1998).