These are questions you should be asking your veternarian.
I sure if your vet is aware of the heart murmer and said it was OK to do the spay, then he/she will take every precaution necessary.
And if he/she isn't aware of the heart murmer, PLEASE tell him/her.
We have a cat with a heart murmer and they do not want to put him under anesthesia.
I would think they would have you take her to a cardiologist and at least have a sonagram done on her heart to see what is causing the murmer before doing any kind of surgery.
I sure if your vet is aware of the heart murmer and said it was OK to do the spay, then he/she will take every precaution necessary.
And if he/she isn't aware of the heart murmer, PLEASE tell him/her.
We have a cat with a heart murmer and they do not want to put him under anesthesia.
I would think they would have you take her to a cardiologist and at least have a sonagram done on her heart to see what is causing the murmer before doing any kind of surgery.