English Postural orthostatic tachycardia syndrome Cited by user Tosborne01 on 16 May 2023 Postural orthostatic tachycardia syndrome (POTS) is a condition characterized by an abnormally large increase in heart rate upon standing.
English Orthostatic intolerance Cited by user Tosborne01 on 16 May 2023 Orthostatic intolerance (OI) is the development of symptoms when standing upright that are relieved when reclining.