hi ! my husband had bypass surgery just 4 months ago.he is alright now.But when he is tired his heart beats fast....%-)very fast..........i don't know why?! But i feel very worried!
Is he going to cardiac rehab?
They monitor everything during the exercises and they would be a good source of information about that. I had a 6x bypass 16 years ago. I got a lot more helpful information from the nurses at rehab than I ever did from any of the doctors who treated me. They can also make a report of their findings to his doctor if they feel there might be something amiss.
There are many things that can affect heart rate, such as food and drink and the possibility that his medication needs to be adjusted.
You should be addressing this with his doctor.