I'm only on my fourth cycle of radiation , after the last two cycles I have experienced very rapid heartbeat that lasts at least an hour or more , is this normal ?
Always best to mention anything and everything to the treating staff even if not related. They should ask you everyday how you are and how you are feeling, it is not out of politeness, it is so they can be aware of everything and help point you in the right direction to see the right Drs :)