Postural Orthostatic Tachycardia Syndrome Home>Conditions_and_Diseases>Neurological_Disorders>Dysautonomia>Postural Orthostatic Tachycardia Syndrome     Web Pages Orthostatic Intolerance An article written by David Robertson, MD explaining this disorder. A list of alternate names which could be used for this or similar disorders is enclosed. Postural Orthostatic Tachycardia Syndrome A definition of POTS and its relation to Chronic Fatigue Syndrome and the pathophysiology. What is Orthostatic Intolerance? An article about orthostatic tachycardia syndrome (POTS). What it is, the prognosis as well as all the names used to refer to this disorder. Postural Orthostatic Tachycardia Syndrome Patient's report on causes, symptoms, and treatment.