Chance was diagnosed by a cardiologist in January (he was 11 yrs old then) with atrial fibrillation and ventricular tachycardia. His heart was not enlarged, so he said we must have caught it early. He is on Diltiazem and Atenolol. He has been on a senior multi-vitamin, vit e, vit c, a vit b complex, fish oil, CO-Q10 and a taurine supplement even before he was diagnosed. He also gets Cosamin DS, Metacam and Tramadol for hip dysplasia and spondylosis.
The cardiologist and regular vet said to try and keep him stress free. Since he's older and its hard for him to get around too much, its not too hard. He does pant more. I keep his belly trimmed close, trim the hair under his ears for more airflow and keep his paws trimmed.
He is happy and doing well thru all of this. He can't hear anymore, so he gets a little bossy and barks if he can't see us.
If the vet puts your dog on meds, check out Walmart and Target for their $4 deals. Chance's meds are on the lists, which the cardiologist said was great since the meds can get expensive.
Good luck and try and stay calm for your pup, since they seem to pick up on our anxiety.