Liz Buchanan BVSc MRCVS
Keymaster
Hello! When I was at vet-school (insert olde-worlde background music here), we had a whole lecture about how to tell the difference between Syncope (fainting) and fitting (neurological overexcitement) by simply glancing at the dog. However, it has now - after research - become apparent that the two are actually quite difficult to tell apart. The syncope waters can further be muddied by muscular weakness, low blood glucose and so on. To my understanding, syncope can indeed be very rapid and there can be many different explanations for the signs you are describing. Furthermore,dogs with heart disease can still have fits! - although syncope might also be considered in this instance.
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