I'm so sorry to hear about that result–it is indeed an awful lot to take in on a number of fronts. It's hard to know what to say or recommend–I think Pat has made some good points. I would agree that he is definitely severely affected if he is having the kind of pain sessions you describe, Entirely separate from whatever showed on his MRI, those are really severe signs of pain. I also think that the neurologist is right in suggesting that if you want any chance of a reasonable lifespan for him, with less pain, surgery is the option you want to choose. That does not mean it is the option you must choose, because people make decisions for many different kinds of reasons and not all are comfortable with the idea of surgery. But I would agree that if he is this severely affected on his MRI, and also has been having these quite serious sessions of pain and they are worsening, you really do need to make the decision fairly quickly and it is true that he could just suddenly reach a point where he is too compromised to benefit. Yhat could happen tomorrow or that could happen a year from now–it is impossible to know with this condition.
I have no idea how the heartworm would affect his having surgery and that is something to work out with the two specialists. The CVD, as Pat says, would not overly concern me either as it is only a mild murmur at this time. the major threat to him having more than what could be weeks to months to live, as the neurologist is saying, is the SM. If he can manage the surgery and then go into the heartworm care, I would be getting him into surgery as fast as possible. If it is felt it is better to deal with the heart worms and that that can be done within a fairly brief space of time, then maybe you want to do that first and then do the surgery, if you have decided that he should have the surgery.
I have no idea how the heartworm would affect his having surgery and that is something to work out with the two specialists. The CVD, as Pat says, would not overly concern me either as it is only a mild murmur at this time. the major threat to him having more than what could be weeks to months to live, as the neurologist is saying, is the SM. If he can manage the surgery and then go into the heartworm care, I would be getting him into surgery as fast as possible. If it is felt it is better to deal with the heart worms and that that can be done within a fairly brief space of time, then maybe you want to do that first and then do the surgery, if you have decided that he should have the surgery.