Doctors later diagnosed him with postural orthostatic tachycardia syndrome, he said, more commonly referred to as POTS, an autonomic condition that can dramatically increase a patient’s heart rate when standing up instead of spread horizontal. Handled wrong — or not yet diagnosed — and POTS can lead to extreme exhaustion or dizziness.
In his worst moments, Porziņģis’ heart rate could stabilize while he was lying down, but the act of standing up could rev it to 130 beats per minute.
“You know how people say, ‘Oh, I’m so fatigued.’ I’ve never used those words. I don’t even like to speak in those terms, but I really was like that,” Porziņģis said. “At that time, I could just lay on the couch and be a house cat.”
https://www.nytimes.com/athletic/6737266/2025/10/22/atlanta-hawks-kristaps-porzingis-illness-trae-young/?source=user_shared_article
