God. One would expect a poor prognosis for longevity, but god only knows.
Life expectancy. It depends on a number of factors, including family history and your personal medical history. Insurance actuarials actually have tables that estimate this, too!
Life expectancy. You ask a difficult question as there are multiple factors involved in that person's life expectancy. If one concentrates on dialysis patients, the average life expectancy for a 60-65 year old on dialysis is 4.5 years compared to 17-22 years for similarly aged person not on dialysis. The severity of his CHF would play a role in the patient's life expectancy and would diminish it. Ask his doctor.