Definitely follow your Drs. suggestions. If you really have second thoughts or doubts about your MD, you should get a second opinion. It's your health, your life...at the end of the day, you have to be your own advocate.
Just out of curiosity, what arrhythmias did the holter show? Many arrhythmias can be dangerous, but he said that it's not an emergency for you, so hopefully yours is not.
Also, a Dipyridamole scan is a type of stress test. It will show if the heart is getting the proper perfusion of blood.
I am a cardiac intensive care RN, which is why I am asking. Again, the best I can tell you is that if you have any doubts, either ask your MD specifically, or seek another opinion. I could help shed a little light or answer a question you might have about an ordered test or your arrhythimias, but I can't give you any medical advice.
-28 year old female
-Diagnosed with UC January 2014 while 7 weeks pregnant
-2 weeks in hospital
-Started Remicade in hospital
-Current meds remicade and colazal
-one flare up since remission while 3 months post partum, acheived remission with increase in colazal, rowasa enemas, and next infusion.
-beautiful healthy remicade baby, Declan Michael