They claim its because of the medicine.. . To justify EKGs on a biweekly to monthly basis. Yet never anything abnormal or 'wrong'?

Im betting a 6 chamber heart is some sort of neverbeforeseen.
I was never given a reason to justify the initiation of this process either; i had a tumor of the brain. So lets monitor your heart? Doesnt seem normal or right to me.
Please advise.