Sudden Vision Changes and Falls: Potential Neurologic and Cardiac Causes

Acute visual disturbance (e.g., seeing blue) followed by a fall with vocalization is a neurologic emergency until proven otherwise. Immediate evaluation is critical.

Differential Diagnosis

1. Transient Ischemic Attack (TIA) / Stroke: Posterior circulation (vertebrobasilar) ischemia → visual field deficits, diplopia, dizziness, ataxia, drop attacks. "Blue vision" rare but reported with occipital ischemia.
2. Seizure: Occipital lobe seizure → elementary visual hallucinations (colors, flashes) → secondary generalization (tonic-clonic) → fall, vocalization (ictal cry), postictal confusion.
3. Ocular Migraine (Retinal Migraine): Monocular scintillations, scotoma, blindness ± headache. No fall unless syncopal comorbidity.
4. Syncope (Vasovagal, Cardiac, Orthostatic): Global cerebral hypoperfusion → grayout/blackout → fall. Visual aura (tunnel vision, flashes) precedes. Vocalization rare but possible with myoclonic jerks (convulsive syncope).
5. Psychogenic Nonepileptic Seizures (PNES): Emotional trigger → hyperventilation → hypocapnia → cerebral vasoconstriction → visual symptoms + fall. Vocalization common.
6. Vertebrobasilar Insufficiency: Positional (head turning) → vertigo, visual symptoms, drop attacks.

Red Flags for Immediate ER

• Persistent neurologic deficit (weakness, aphasia, gaze palsy).
• Altered mental status.
• Head trauma from fall (anticoagulated? age >60?).
• New atrial fibrillation, chest pain.
• Recurrent events.

Urgent Workup

• Non-contrast head CT (rule out hemorrhage).
• CTA head/neck or MRA (vertebrobasilar).
• ECG, telemetry, troponin.
• EEG if seizure suspected.
• Carotid ultrasound.
• Basic labs: glucose, electrolytes, CBC, coagulation.

Do not drive. Call EMS. Time is brain.