Transient ischemic attacks are more than "ministrokes"

Area of Science:

• Neurology
• Public Health
• Epidemiology

Background:

• Transient ischemic attacks (TIAs) are recognized as critical warning signs for impending stroke.
• A recent hypothesis suggests TIAs carry substantial risks for mortality and long-term disability, necessitating comprehensive diagnostic evaluation comparable to that for full stroke events.

Purpose of the Study:

• To investigate the prognosis of Transient Ischemic Attacks (TIAs) and compare outcomes with acute stroke.
• To determine the risk of subsequent stroke, death, or disability in TIA patients.

Main Methods:

• A prospective, observational study involving 1380 TIA patients and 3855 stroke patients across 82 hospitals in southwest Germany.
• Data collection included pre- and in-hospital procedures, symptoms, outcomes, complications, and therapies.
• Six-month follow-up assessed endpoints such as death, dependence in daily living (Barthel Index <95, modified Rankin Scale [mRS] 3-6), and institutionalization.

Main Results:

• TIA patients experienced an 8% in-hospital stroke incidence and 5% within six months post-discharge; stroke patients had 7% and 6% incidence, respectively.
• Mortality rates were 2% in-hospital and 5% thereafter for TIA patients, versus 9% and 10% for stroke patients (P<0.001).
• At follow-up, 17% of TIA patients were dependent compared to 38% of stroke patients (P<0.05); preexisting deficits (mRS >2) predicted worse outcomes, while stroke unit admission improved survival and independence.

Conclusions:

• The study confirms a "not so benign" prognosis for TIA patients, highlighting significant risks of early stroke, death, and disability.
• Management and treatment strategies for TIAs should be aligned with those for acute stroke.
• Admission to a stroke unit is a predictor of better outcomes for TIA patients.