Inappropriate Sinus Tachycardia

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Hello to all. Since February 2016 I have been having fast heart rates. I had a 24hr halter that showed SVT. I had a Echocardiogram and Stress Test that where both normal except that on my Stress test my Cardiologyst said they noticed that my heart rate spiked up pretty quickly with little exercise. He told me then on my follow up appointment that what I had was (IST) Inappropriate sinus tachycardia. He said is not life threatening just to drink lots of watet and exercise that, that should help symptoms. He also prescribed me Metoprolol 25mg once a day which I hhave not started yet because I have read that in some patients it makes symptoms worst and referred me to a Electrophysiologist. I have a appointment with the EP Dr. In 2 weeks. I wanted to know if any of you guys have been diagnosed with IST and how has it been for you guys? Please advice. With much appreciation a newly Diagnosed IST pt.

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    Are you all still active on here? I am so lost, I need some reassurance about IST. I have some concerns and questions and have nobody around with this to talk to... much appreciated in advance!

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