Postural orthostatic tachycardia syndrome

A medical condition that affects blood flow and is characterized by an excessive increase in heart rate when transitioning from lying down to standing up. It is a form of dysautonomia and can cause symptoms such as dizziness, lightheadedness, fainting, and rapid heartbeat, often diagnosed through tests like the tilt table test. This condition is more common in women and treatment typically includes lifestyle changes and medications to manage symptoms.