Problems with immunotherapy

I was informed that my last immunotherapy injection (Phesgo) was not being given due to my Muga scan showing a drop in heart function. I was reassured that missing the last injection was not a problem as I had 17 of the 18 treatments.  I was  prescribed Ramapril to rectify this.  I will be given a Muga scan and follow up in three months time, to check on this problem. Has anyone else had this.