What is "presyncope"

alt. (context medicine English) lightheadedness, muscular weakness and feeling faint as opposed to a syncope, which is actually fainting. n. (context medicine English) lightheadedness, muscular weakness and feeling faint as opposed to a syncope, which is actually fainting.

Presyncope is a state consisting of lightheadedness, muscular weakness, blurred vision, and feeling faint (as opposed to a syncope, which is actually fainting). Presyncope is most often cardiovascular in etiology. In many patients, lightheadedness is a symptom of orthostatic hypotension. Orthostatic hypotension occurs when blood pressure drops significantly when the patient stands from a supine or sitting position. If loss of consciousness occurs in this situation, it is termed syncope.

Presyncope is frequently reported in patients with forms of dysautonomia such as the postural orthostatic tachycardia syndrome.