Definition: A syndrome characterized by orthostatic intolerance resulting in tachycardia, often accompanied by a decrease in the blood pressure. It occurs when individuals change from the supine position to an upright position. Other signs and symptoms include lightheadedness, fainting, fatigue and muscle weakness.
Synonyms (terms occurring on more labels are shown first): postural orthostatic tachycardia syndrome
More information: PubMed search and possibly Wikipedia
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