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Long-term prognosis after transient ischemic attacks

N Simonsen, H D Christiansen, A Heltberg

    Acta Neurologica Scandinavica
    |March 1, 1981
    PubMed
    Summary
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    Patients with transient ischemic attacks (TIA) face higher long-term mortality than the general population. This study quantifies excess mortality, identifying risk factors and informing ongoing prophylactic therapy decisions for TIA survivors.

    Area of Science:

    • Neurology
    • Cardiology
    • Epidemiology

    Background:

    • Transient ischemic attacks (TIAs) are critical indicators of underlying cerebrovascular disease.
    • Long-term survival outcomes for TIA patients compared to the general population require further elucidation.

    Purpose of the Study:

    • To assess the long-term mortality of patients following a transient ischemic attack (TIA).
    • To identify prognostic factors influencing survival in TIA patients.
    • To characterize the pattern of excess mortality in TIA survivors.

    Main Methods:

    • Retrospective follow-up study of 243 patients diagnosed with transient ischemic attacks (TIAs).
    • Analysis of survival data using semilogarithmic plotting to determine excess mortality rates.
    • Comparison of observed survival against expected survival in the general population.

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    Main Results:

    • Long-term mortality for TIA patients was significantly higher than the general population.
    • A consistent excess mortality rate was observed over the follow-up period, quantifiable by a single numerical index (-0.04 in this series).
    • Unfavorable prognostic factors included carotid TIA, extracerebral disease, and hypertension. Fatal strokes accounted for 20% of deaths, occurring earlier than cardiac deaths (38%).

    Conclusions:

    • Transient ischemic attacks (TIAs) are manifestations of generalized vascular disease, carrying a persistent excess mortality risk.
    • The constant excess mortality suggests that prophylactic therapy should not be discontinued at any specific time point post-TIA.
    • The proposed numerical index facilitates standardized comparison of TIA patient survival across different populations.