What does PPS stands for as cardiology diagnosis?

In cardiology, PPS typically stands for "Postural Orthostatic Tachycardia Syndrome." This condition is characterized by an abnormal increase in heart rate when transitioning from a lying down to a standing position, often accompanied by symptoms such as dizziness, lightheadedness, and fatigue. It is commonly seen in patients with autonomic dysfunction and can significantly impact daily activities. Diagnosis often involves measuring heart rate and blood pressure changes during postural changes.