I don't tend to worry but I am awfully curious and want answers to things. I appreciate your post. Thanks.
Most MRIs I've had lately are open bores and some have mirrors so you can see somethings going on. Even with that, I can almost feel panic rising especially if the people doing the MRI don't talk to me. I can pray my way out of the rising panic and peace comes again.
Could be, some say pressure or irritation of the vagus nerve can cause certain types of arrythmia.
I had an MRI yesterday too!
I had a cardiac MRI for my ongoing PVCs. I was in the machine (a small bore MRI) for 2 and a half hours. It was brutal.
MRIs, especially small bore are tough on folks, it made me a bit claustrophobic and I normally am not. Towards the end of this, I felt somewhat panicked and my heart rate kicked up a bunch. They had one last 3 minute set of picture to get and could not because of my heart rate. (they have to time the picture with my hear rhythm). I had to settle myself down and get my heart rate back down for them to get the pics. Managed to get through it.
For a cardiac MRI I had an IV in for die contrast, a monitor for respiration, EKG leads, and a heart antenna on my chest. I could tell they were timing the pictures with my heart beat and respiration. The machine was very loud, I had head phones on. I'm very tuned into my heart beat due to an ongoing PVC issue and could not tell my beats from the machine. I was so confined I couldn't even get my hands to touch, because believe me I wanted to feel if my pulse was OK. To make it all worse, they had a continuous drip on the IV when they weren't injecting the die and I had to pee so bad!
Anyways, if I were you I wouldn't worry. position, pressure, and other factors can certainly put pressure on the vagus nerve or other part and cause some arrhythmia which is very common.