### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi, My mother was takne to hospital with breathing difficulties last week. She had water in her lungs. They also did an angiogram, and there are three blocked arteries. 98%,99%, 80%. (i think she also had a heart attack). They cannot do angioplasty stenting because of multiple blockages in places where arteries forks too. They had a meeting, and a surgeon is willing to do heart bypass surgery. Now she has had a stroke previously 12 years ago, which has left her with left sided weakness. They also say her heart is running at 27% rather than the normal 55%. Is heart bypass surgery safe for her to do? Thank you.

### output:

Hello thanks for posting here. I have gone through your description. She has critical heart disease involving the three arteries if the heart. And since her pumping function has Chat Doctor.  So once blocked arteries in the heart are diagnosed, there are two methods to open it. Angioplasty and bypass surgery. As your doctor has advice angioplasty cannot be done because of triple vessel disease and also involving the arteries where they bifurcate. So surgery is the only option in her. Surgery with a low pumping function is definitely riskier than one with a normal function. But here you have to assess the risk versus benefits. If you don't do the surgery then you are not treating the cause. Her quality of life will be poor, she will get tired easily, and she stands the probability of having further heart attacks also which will further decrease the function. Going ahead with the surgery will improve quality of life, she can do her day-to-day activities, travel etc. however despite surgery pumping function will not increase more than 35%. But the risks of heart attacks is evaded. Another thing that should be considered is how mobile she is. As you said she has left sided weakness. If she is bed bound and requires help for her day-to-day activities, then a surgery would be more of a suffering to her. A CABG surgery has a good outcome and patients usually do well for 12-15 years. Nowadays with advanced technologies and approaches, heart surgery risks have come down a lot. I personally have seen patients with 25-30% do well with CABG. So my advice is it will be worthwhile to take a call for CABG. (only if she is ambulatory, and you want to increase quality of her life)wishing her good healthRegards