Answer: B, C and D. Decreased clotting factors would be a potential cause of hemorrhagic rather than ischemic stroke.

Follow up: Several days after discharge vestibular signs were decreased but the seizure episodes increased in frequency. Some of the episodes were very mild and consisted of brief collapse, but during others, the dog would cry out and have a gran mal seizure. Seizure often occurred immediately after struggling while receiving anticonvulsant medication. The patient was re-evaluated and a cardiac arrhythmia identified. See ECG tracing, below.

Question: What abnormality is indicated from this ECG tracing?

ecg strip