It has been discovered that a change in posture that results in an increase in orthostatic stress, when followed by a withdrawal of sympathetic nervous activity, may indicate a future onset of vasovagal syncope (VVS). The invention is directed to devices and techniques for early detection of an episode...http://www.google.fr/patents/US7647106?utm_source=gb-gplus-shareBrevet US7647106 - Detection of vasovagal syncope
