In the absence of structural heart disease (including a normal ECG), syncope is most often of neurally mediated reflex origin or orthostatic hypotension. As a rule, reflex etiologies predominate in ...

Orthostatic hypotension, also known as postural hypotension, happens when blood vessels in the body fail to constrict (narrow) in response to gravity. This causes a decrease in blood pressure and ...

Orthostatic, or postural, hypotension is defined as a sudden drop in blood pressure resulting from a change in posture, such as when a person stands up quickly. When a person stands up after sitting ...

November 27, 2001 -- Bethesda, Md. — The American Journal of Physiology: Heart and Circulatory Physiology, one of the 14 peer-reviewed journals published by the American Physiological Society (APS), ...

Postural orthostatic tachycardia syndrome (POTS) is a common heterogeneous form of cardiovascular autonomic dysregulation. The exact cause of POTS remains unclear. Patients typically complain of ...

The problem, a brief but precipitous drop in blood pressure that causes lightheadedness or dizziness when standing up, is called orthostatic hypotension. By Jane E. Brody Orthostatic hypotension — to ...

Establishing the cause or causes of syncope serves two principal purposes. First, an etiologic diagnosis permits assessment of prognosis and risk of recurrence, both issues of great concern for ...