Twenty minutes after the onset of symptoms, an adult client presents to the emergency department with slurred speech and right-sided weakness. After a computerized tomography (CT) scan reveals a non-hemorrhagic stroke, the nurse administers alteplase. Which assessment finding warrants immediate intervention?

Choice A reason: A headache with blurred vision following alteplase administration could indicate intracranial hemorrhage, which requires immediate intervention. Choice B reason: Lower extremity edema is not typically an immediate concern post-alteplase administration unless it indicates a deep vein thrombosis. Choice C reason: Paroxysmal supraventricular tachycardia requires monitoring, but it is not as urgent as a headache with blurred vision, which could signify a life-threatening complication. Choice D reason: Frequent premature ventricular contractions should be monitored, but they are not as critical as a headache with blurred vision post-alteplase.