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My dog with heart issues died after a seizure. What happened?

Updated On September 23rd, 2025

My dog died after a seizure, why? My dog suffered from a heart murmur, enlarged heart, and would hyperventilate daily and lose concious, eventually waking up after and being fine. No regular history of seizures. Eventually, one day after eating, he started to seize. He woke up and went to eat, and then seized again. I doubt he was choking on his normal small soft food. He was violently shaking, and the shaking stopped, twitched a little by the neck and then died. No sign of concious aftershaking

1 Answer

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on January 26th, 2020

I'm very sorry to hear about the loss of your dog. It's possible that he may have had a stroke or blood clot secondary to his heart disease that traveled to his brain. Or, if he was regularly having collapsing episodes due to his heart (syncope), what you saw may have been one of these that was especially severe, as this is a common cause of sudden death in dogs with severe heart problems. If you want to try to get a more definite answer on what the cause of death may have been, you would need to have an autopsy done, called a necropsy in animals. Your veterinarian should be able to let you know where you can have this done, if it's something you want to pursue. Again, I'm very sorry for your loss.

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