Can you have both ist and pots syndrome together was diagnosed with ist but wanted pots ruled out first. then was diagnosed with pots! not sure now?

Dysautonmia: Ist ;pots are both poorly understood conditions - that may indeed overlap . Pure ist - patients are continuously tachycardic - or a sig higher baseline pulse.With simple exertion the heart rate can soar, very challenging to treat - bblockers etc have only modest efficacy . Ablation is sometimes required. Pots is likely a disorder of vascular resistance - measures to increase fluid intake can help.