POTS

Postural orthostatic tachycardia syndrome is characterized by orthostatic tachycardia in the absence of orthostatic hypotension. Criteria for diagnosis of POTS are as follows: 1. Heart rate increase ≥30 beats per minute from supine to standing. 2. Symptoms get worse with standing and better on lying down 3. Symptoms lasting ≥6 months 4. Absence of other overt cause of orthostatic symptoms or tachycardia like active bleeding, acute dehydration, and medications.