A client arrives at the emergency department exhibiting sudden unilateral weakness and difficulty speaking. To quickly determine the type of stroke and guide treatment decisions, which diagnostic test should the nurse anticipate being performed first?

Brief Introduction: Stroke is an acute neurologic emergency caused by cerebral ischemia, intracranial hemorrhage, neuronal injury, and impaired cerebral perfusion. Rapid differentiation between ischemic and hemorrhagic stroke is essential because treatment strategies, including thrombolytic therapy, depend on the underlying pathology. Rationale: A. Magnetic resonance imaging with contrast enhancement provides detailed visualization of cerebral tissues and vascular abnormalities. However, it requires more time and is less readily available in many emergency settings. Immediate stroke evaluation prioritizes faster imaging modalities. Therefore, it is not the preferred initial test. B. A non-contrast CT scan is the first-line diagnostic study for suspected acute stroke. It rapidly identifies intracranial hemorrhage and helps differentiate hemorrhagic from ischemic events. This distinction is critical before administering thrombolytic therapy. Therefore, it is the most appropriate initial diagnostic test. C. Electromyography evaluates electrical activity within muscles and peripheral nerves. It is useful for diagnosing neuromuscular disorders such as neuropathies and myopathies. It does not assess acute cerebral pathology responsible for stroke symptoms. Therefore, it has no role in the initial evaluation of stroke. D. Blood glucose testing is important because hypoglycemia can mimic stroke manifestations. However, it cannot determine whether a stroke is ischemic or hemorrhagic. Neuroimaging remains necessary to guide definitive treatment decisions. Therefore, glucose testing is supportive but not the primary diagnostic study.