my father has to do a surgery for the heart with 4 blocks(90,90,90,100%),doctors have suggested to do it with help of a pump to help the heart beat regularly,his heart is only 30% working,he has to do an angiogram, only after which the surgeon will let us know if it is worth doing a surgery or not becoz his heart is way too damaged,his creatine levels are high 1.76,what is the best thing to do?