Postural Orthostatic Tachycardia Syndrome (POTS) can cause symptoms like dizziness, rapid heartbeat, and fainting when standing. A tilt table test helps diagnose it by strapping you to a table that slowly moves from lying flat to an upright position while your heart rate and blood pressure are continuously monitored; in POTS, the heart rate typically rises significantly without a major drop in blood pressure. During the test, you may feel lightheaded, nauseous, sweaty, or even faint—similar to your usual symptoms—but medical staff are present to ensure safety. The results help doctors confirm whether your symptoms are due to POTS or another condition and guide appropriate treatment.