Because I work at a shelter, I take home some "unadoptable" dogs. My 5 y/o border collie/newf cross came in as a 7 m/o puppy with inoperable sub-aortic stenosis.
Well, she's started coughing...we're treating her for kennel cough, but I'm worried about congestive heart failure...I'm just scared. Vet said do the course of doxy, then we'll go to Plan B....
Jingles for your boy!! Those CHF cases are tough, but luckily there are lots of different drugs to combat the systemic decline that accompanies CHF. Have you had recent radiographs taken to check for any new heart enlargement (or even better, a thoracic ultrasound?)?
I agree with Houndhill - if youhavent already seeked a boarded cardiologist, its probably worth your time and money to do so.
We have seen 3 "inoperable" SAS dogs this month, and all 3 recovered from surgery very well . If surgery really isnt an option (it wouldnt be for me - too costly!), sometimes a changeup of medications can significantly improve quality of life.