A patient arrives at the hospital by ambulance, presenting symptoms of confusion, partial paralysis, and slurred speech. The attending physician quickly diagnoses a stroke as the most likely cause and injects the patient with tissue plasminogen activator (tPA) to dissolve the clots, but the patient’s symptoms continue to deteriorate over the next few minutes. What is the most likely explanation for the patient’s failure to respond to treatment?
a. The patient has chronic epilepsy and has been misdiagnosed.
b. Multiple clots caused the stroke, and another dose of tPA is required.
c. The stroke occurred due to a burst blood vessel instead of a clot.
d. A stroke cannot be treated by tPA once paralysis has occurred.
c. The stroke occurred due to a burst blood vessel instead of a clot.
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