Re: Rapid increase in heart rate and shortness of breath when climbing stairs
londonlin - Make sure your thyroid problems are being properly treated as it can cause a bunch of symptoms and should never be overlooked.
sampo2 - That's what my post was alluding to, but even though I have NCS and POTS I don't like going around suggesting that everyone else with elevated heart rates has it too. To be honest, that your heart rate does return to normal, when standing, sort of suggests that may not be what you have.
And yes, being sick (having a fever) or even dehydrated with drastically affect your heart rate even while resting. Mine was around 116bpm resting at the hospital yesterday.