The "Red Flag Symptoms" are related to brainstem compression; they generally occur in Chiari cases which are compounded by basilar invagination, basilar impression, retroflexion of the odontoid, and similar disorders.
The "Red Flag" Symptoms Are:
1. Severe swallowing problems
2. Tachyarrhythmias
3. Severe nausea
4. Central sleep apnea
