I’m not a vet, but a very experienced caretaker of ancient cats with multiple medical problems under the care of various veterinary ‘ologists. This does NOT sound like a heart problem. Any heart problem severe enough to cause sudden and total collapse and loss of consciousness, would not be followed by the animal being back to its usual perky self a minute later. As other posters have noted, this sounds like epilepsy. If it is epilepsy or any sort of seizure disorder, phenobarbitol is the usual first-try medication. I had a cat with a strange seizure disorder in old age — basically very frequent collapse with twitching for a few seconds, but no loss of consciousness and always fine after a few seconds. A tiny dose of phenobarbitol solved the problem and kept kitty seizure free for the last 4 of his 21 years.
This doesn’t mean that your dog doesn’t ALSO have a heart condition, and it’s possible the vet has prescribed an appropriate medication for whatever heart condition he detected. But no heart medication would be expected to stop seizures. I wouldn’t have a whole lot of faith in a vet who doesn’t recognize what you described as some type of seizure.
Thank you ( and the rest of you as well ) for the reply .
The weird thing is , this NEVER happened UNTIL the day I shot the cap gun . As soon as I fired that shot he immediately went down .
The Japanese name of the drug is called LERITE , otherwise known as Enalapril maleate .