What is the medical term for fainting caused by temporary loss of blood flow to the brain?

• A. Seizure
• B. Syncope
• C. TIA
• D. Stroke

Answer: (B)

Fainting from a temporary drop in blood flow to the brain is syncope. It happens when cerebral perfusion falls briefly, so the brain isn’t getting enough oxygen and consciousness is lost for a short time and then returns as blood flow resumes. This differs from a seizure, which is an abnormal electrical discharge in the brain that can cause loss of consciousness with convulsions and postictal confusion, not simply a brief perfusion drop. A transient ischemic attack is a brief interruption of blood flow that causes stroke-like symptoms but typically keeps the person conscious and symptoms resolve quickly. A stroke involves actual brain tissue injury from a blocked or ruptured vessel and leads to persistent neurological deficits.

In practice, when you suspect syncope, ensure the airway and breathing are supported, monitor circulation, and place the patient supine with legs elevated if there’s no trauma and the patient can tolerate it. Transport for evaluation, especially if there’s chest pain, abnormal vitals, or recurrent episodes.