MVP is quite common and normally does not cause any problems. Some people claim that it can be the cause of chest pain, panic attacks etc, but as you are talking about recently experienced slight pain, I can not imagine that it is from the MVP.
RBBB doesn't cause any symptoms. Sometimes, people with the condition don't even know they have a bundle branch block. (you could ask the heart rhythm community to be sure).
So, there really is no need for fear for a heart attack. In fact, now that they have made an ECG and found nothing that points towards an attack, you should, more than ever, feel confident that your heart is healthy.
So, I guess you are right. It probably is from the inactivity. Lying in bed is NOT good for people.
Take care,
Ger
Im 35 years old. I also have Rbbb as well as mvp. I suffer from chronic chest pain& severe anxiety attacks. The only advice I have for any body with these conditions.... fallow cardiac diet, keep well hydrated, and exercise atleast 2x a day. Even if its just a 15 min brisk walk. ♥