A Transient Ischemic Attack (TIA), commonly referred to as a “mini-stroke,” is a transient episode of neurological dysfunction where blood flow to a part of the brain is temporarily interrupted, depriving neurons of oxygen and glucose. Although symptoms resolve completely, a TIA is far from benign—it is a medical emergency that serves as a powerful predictor of an impending ischemic stroke. as per current definition TIA is characterized by transient neurological symptoms without acute infarction on MRI or CT imaging, regardless of symptom duration.
Common causes include Embolism from carotid artery atherosclerosis, Cardioembolism (especially atrial fibrillation) etc.
Symptoms usually begin suddenly and resolve within minutes to an hour, although they may last longer. Common symptoms are,
- Sudden unilateral weakness or numbness
- Facial droop
- Slurred speech (dysarthria)
- Aphasia
- Vision loss in one eye (amaurosis fugax)
- Diplopia
- Vertigo with focal neurological deficits
- Ataxia
- Difficulty understanding language
Risk factors are similar to ischemic stroke and include
Non-Modifiable: Increasing age, Male sex, Family history and Previous TIA or stroke
Modifiable: Hypertension (most important), Diabetes mellitus, Hyperlipidemia, Smoking, Obesity, Physical inactivity, Atrial fibrillation and Carotid artery stenosis
A TIA is one of the strongest predictors of future stroke.
Since symptoms often resolve before assessment, diagnosis relies heavily on history and imaging.
Treatment basically involves identifying etiology and prevention of stroke with short-term dual antiplatelet therapy
Although neurological deficits resolve completely, TIA should never be considered harmless. Patients who receive prompt evaluation and appropriate secondary prevention experience a markedly reduced risk of subsequent stroke. Delayed diagnosis, however, may result in disabling or fatal ischemic stroke.
Comment on what preventive action you would take to avoid ischemic stroke?
MBH/PS