Hi Rachel,
My OH is in a similar situation as your Dad he is on HT and has been since diagnosis over 18mths ago. Trevor has had heart attacks and a stroke so a lot of treatments are not available to us. Chemo is very strong and one of the treatments that Trevor would not be able to cope with. We have been told that he could have RT but only below the waist due to a defibulator in his chest.
Everyone is different and I presume it would depend on your Dad's heart and previous medical history. Would you be able to go along next Tue it often helps to have someone extra to take things in.
I will be thinking of your Dad.
BFN
Julie X