Historical features	Possible etiology
Abnormal uterine bleeding, fatigue, rectal bleeding	Anemia
Amaurosis fugax, aphasia, dysarthria, unilateral sensory and motor symptoms	Stroke
Bradykinesia, pill-rolling tremor, shuffling gait	Parkinson disease
Burns	Intravascular volume depletion
Chest pain, palpitations, shortness of breath	Congestive heart failure, myocardial infarction, myocarditis, pericarditis
Chills, fever, lethargy, nausea, vomiting	Gastroenteritis, sepsis
Extremity swelling	Congestive heart failure, venous insufficiency
High-risk sexual behavior	AIDS, neurosyphilis
Progressive motor weakness	Guillain-Barré syndrome, multiple system atrophy
Relapsing neurologic symptoms in various anatomic locations	Multiple sclerosis
Symptoms after a meal	Postprandial hypotension
Witnessed collapse	Cardiac arrhythmia, seizure