Don t give up on your geriatric dog yet. This results in a narrowing of the outflow tract. Mildly affected dogs may live a normal life span without treatment. More severe cases, however, eventually results in heart failure, despite medical therapy. Surgical correction is rarely practical in dogs, for economic and technical reasons.
Definitive treatment requires open-heart surgery, a very costly procedure.
Balloon dilation during cardiac catheterization has resulted in improvement of symptoms in some dogs, but the long-term survival rates appear to unchanged. To my knowledge this has not been tried in dogs. My 6 year old male boxers has had like black out where he seems like he is actually dead but after a few minutes of yelling and shaking him he seems to come back. Now the first attack occurred back in Feb and he was fine until last night where he had 2 of these episodes one happened at 6pm and the other at 11pm. This is, unfortunately, a very serious and ultimately fatal disease that affects the heart muscle itself.