IST ?

I was diagnosed yesterday with IST.  The nurse just called and told me that is what the results are from the 48 hour holter monitor and that the Dr. wants to put me on perafirmil???  I have been trying to read as much as I can about IST but I am more confused.  I have been told over the course of the last 8 months that I have been having panic attacks, I am having anxiety, etc.  I am a little depressed (not uncommon for me my whole life) but panic attack and anxiety, I really don't think I am.  I have the same everyday normal stresses that I have always had and I am just the type of person that lets things go and don't get upset too easily.  Am I just in denial and really do have an anxiety issue or is the IST a real problem that can be caused by other things other than stress and anxiety?  I have not been sick other than having some back problems.  L4L5S1 discs are slipped and I have had 2 ESI injections since July.  Is IST something that will get worse over time, better or just stay the same?  It got worse for me over the last few months which made me go see the Cardiologist.  Thank you for any information!  

[vienna13]

Inappropriate Sinus Tachycardia?
As I understand people with this disorder should be avoid stress because they super sensitive to adrenalin. You said you are a calm person.” lets things go and don't get upset too easily. “…who knows maybe that is not soo good.:) …because ‘those’ things are not going, but staying inside.  I had Tachycardia but not anymore since I am on a high dose of pills, but I need them for high blood pressure and for my “week heart”.
Do not worry; just say out calmly but loudly:) all you don’t like before letting them go..........

My Best !

[ChatterAlly]

I thought the same thing when I was told I was having panic attacks.  I am too mean and bull headed to be having panic attacks. REALLY!  Then I accepted it and calmed down. Changed some of my lifestyle. What a difference.  The "stroke" symptoms I thought i was having disappeared. I am with you. But do try to change some things and see if that helps. Exercise is been my best defense lately.
But I did have SVTs back a few years ago and took Amiodarone for 9 months.  The SVTs stopped while I was on the drug. I stopped the drug because of the warnings. The missed beats have never returned. Hopefully you will have the same luck.
Take care, Ally