[Autonomic nervous system and reflex syncope].

This review discusses important aspects of pathophysiology, diagnosis and therapy of reflex syncope. The autonomic nervous system plays a crucial role in the origin of this frequently observed form of syncope. In most cases, reflex syncopes occur under specific circumstances. Thus, a detailed history is essential. Besides a physical exam und a normal 12-lead ECG, dedicated tests like tilt-table-testing, carotid massage and the implantation of a loop recorder often assist in making the correct diagnosis. The basis of therapy for all patients is reassurance about the benign course of the disease as well as education about adequate measures. Pharmacotherapy is reserved to a minority of patients. In older patients with repeat or severe syncopes and documented asystoles, pacemaker therapy is a valuable option.