Anthracycline and Strength training.

Hello,
My name is Ian (Male,23) I had cancer when I was 10 and had a 6 month chemo session between May 98 to oct 98. One of the drugs was anthracycline (doxorubicin) and I know it can hurt heart muscles. I had talked to my oncologists about starting exercises. She stated that I should never to bench presses since it increase the internal pressure within my chest and could damage my heart muscle. What I want to know is what specific weight training/resistance training I can do that would be safe and what sort of weight limits I should stick too. I am also doing cardio and I was recommended to increase it to 30 mins, i was previously doing 15-20 minutes 4 times a week. My previous ECG and EKG was normal and so far nothing wrong with the heart *knock on wood*. I am a 6ft guy at 220 pounds.

Thanks,
Ian