Transient Ischemic Attack: Symptoms, Causes, Treatment
النوبة الإقفارية العابرة
A transient ischemic attack is sudden neurological dysfunction from temporarily reduced blood flow to the brain or retina. Symptoms resolving does not make it safe: it can warn of a stroke and requires emergency assessment without waiting for recurrence.
What is Transient Ischemic Attack?
Symptoms resemble stroke, and the distinction cannot be made at home. Diagnosis considers history, examination and imaging, not duration alone. Brain injury may be detected despite symptom improvement, leading to a diagnosis of cerebral infarction.
Related reading: What are the signs of a stroke, and what should I do immediately?.
Symptoms
Warning signs include abrupt one-sided weakness or numbness, facial drooping, speech or comprehension difficulty, sudden vision loss, or severe imbalance with neurological symptoms. Even symptoms lasting only minutes require immediate action.
Causes
A clot may travel from the heart, particularly with atrial fibrillation, or from a narrowed artery. Less common vascular causes also exist. Identifying the mechanism guides prevention rather than prescribing the same blood thinner for everyone.
Risk factors
Risk factors include hypertension, diabetes, abnormal lipids, smoking, atrial fibrillation, narrowed arteries and previous stroke. Risk increases with age, but younger adults can also experience a TIA.
Diagnosis
Evaluation includes blood glucose, neurological examination, appropriate brain and vessel imaging, and an ECG, sometimes followed by longer rhythm monitoring. Migraine, low glucose and other disorders may resemble TIA, but urgent stroke assessment takes priority.
Treatment
After assessment, antiplatelet or anticoagulant treatment is selected according to the cause, alongside blood-pressure and lipid management. Short-term dual antiplatelets or carotid surgery are appropriate only for selected cases. Do not self-start aspirin or double blood thinners for undiagnosed stroke-like symptoms.
Complications
A subsequent stroke is the major concern, making rapid assessment particularly important in the early days. Testing may show that the initial event was already a stroke. The word transient must not provide premature reassurance.
Prevention
Regular follow-up, controlling blood pressure, diabetes and lipids, and stopping smoking reduce subsequent risk. Follow the agreed medication, activity and dietary plan; symptom resolution is not a reason to stop preventive treatment.
When to see a doctor
Call emergency services immediately for stroke signs, even if they disappear while waiting. Record onset or the last time the person was known to be well. Do not drive yourself or wait for a routine appointment.