It lasted about a minute or 2...my husband picked her up to put her on the floor and she was thrashing and kicking. We opened her mouth - to cathc her tongue in case it was a seizure and her tongue was a little blue. we also wondered if she was choking (happened about 10-15 min after her soft food and kibble dinner).
She did not seem unconcious...it cleared quickly after I patted her back. No history of heart problems..
she is a 13 year old pug