Specifically in contrast to the US healthcare at the time.
Would I be guaranteed a hospital bed and free treatment?
How would the quality of treatment/care/the facilities be compared to the US?
Basically how would the average citizen get along with a terminal disease in the USSR?
Solzhenitsyn actually wrote a semi-autobiographical novel on this very experience, called Cancer Ward. If anyone who can answer OP's questions can comment on how accurate a depiction it was, that would be very interesting.