Of those presenting with<unk> to an emergency department, about 4% died in the next 30 days. The risk of a poor outcome, however, depends very much on the underlying cause. Situational<unk> is not at increased risk of death or adverse outcomes. Cardiac<unk> is associated with worse prognosis compared to noncardiac<unk>  Factors associated with poor outcomes include history of heart failure, history of myocardial infarction, ECG abnormalities, palpitations, signs of hemorrhage,<unk> during exertion, and advanced age.
Syncope 
Epilepsy
Laryngospasm
Seizure
Cornea
Apnea
Bronchospasm
Sleep paralysis