Intravenous tissue plasminogen activator for acute ischemic stroke in patients with renal dysfunction.
OBJECTIVE
This study used the Taiwan stroke registry data to evaluate the efficacy and safety of intravenous tissue plasminogen activator (tPA) in treating acute ischemic stroke in patients with renal dysfunction.


DESIGN
We identified 3525 ischemic stroke patients and classified them into 2 groups according to the estimated glomerular filtration rate (eGFR) at the emergency department: ≥ 60, and <60 mL/min/1.73m2 or on dialysis and by the propensity score from August 2006 to May 2015. The odds ratio (OR) of poor functional outcome (modified Rankin Scale (mRS) ≥ 2) was calculated for patients with tPA treatment (N = 705), compared to those without tPA treatment (N = 2820), by eGFR levels, at 1, 3 and 6 months after ischemic stroke. We also evaluated the risks of intracerebral hemorrhage, upper gastrointestinal bleeding, mortality, between the two groups by eGFR levels.


RESULTS
Among patients with eGFR levels of less than 60 mL/min/1.73m2, tPA therapy reduced the OR of poor functional outcome to 0.60 (95% CI = 0.42-0.87) at 6 months after ischemic stroke. The tPA therapy was not associated with increased overall risk of upper gastrointestinal bleeding, but with increased risk of intracerebral hemorrhage. The low eGFR was not a significant risk factor of intracerebral hemorrhage among ischemic stroke patients receiving tPA treatment.


CONCLUSIONS
tPA for acute ischemic stroke could improve functional outcomes without increasing the risks of upper gastrointestinal bleeding for patients with or without renal dysfunction. The low eGFR was not a significant risk factor for intracerebral hemorrhage among patients receiving tPA treatment.