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Hi, i`m Richard, a Veterinarian from the UK. Hopefully I can help today.
Has Rowdy had his heart checked?
The instability and fainting on minor exertion would make me highly suspicious of a heart condition. When did he have the apparent seizure?
Differentiating between a faint and a seizure can be extremely difficult sometimes. Can you describe to me what he did when he had the seizure?
That certainly does sound like a seizure rather than a faint and you are certainly seeing the difference between the episodes. The seizure may have still been heart related if it was due to a hypoxic episode (lack of oxygen to the brain). Blood work would be my first port of call too. Do you have any indication on when you will have blood results?
The blood work will not tell us anything about his heart unless he is anemic. However it will rule out many metabolic causes for the seizure activity. Primarily we are interested in his liver function as this is the most common cause of toxic blood changes that can lead to seizure episodes.
Has he ever had any seizures in the past? Did this all start in the past few days?
My approach to this kind of situation would be blood work followed by heart scan and ecg. If everything there is checking out normal then I would be considering neurology work up with a specialist to try and rule out a central nervous system/brain problem.