Ash,
I do not have any personal experience with this procedure but I would strongly recommend that you push for an answer to your problems with the cardiologist as you have the right to know what is going on, if it is normal and why it is happening.
I see you don't feel you are getting the appropirate attention from your cardiac consultant. This is where my best advice to you is to "ask for what you need" and if it is medical attention then don't stop until you get it.
I wish you well and I hope another member will have some input for you.
Kindly,
Kitt