A nurse in an emergency department is caring for a client who had a seizure and became unresponsive after stating she had a sudden, severe headache and vomiting. The client's vital signs are as follows: blood pressure of 198/110 mm Hg, pulse of 82/min, respirations of 24/min, and a temperature of 38.2° C (100.8° F). Which of the following neurologic disorders should the nurse suspect?

Choice A rationale A transient ischemic attack is typically caused by a temporary blockage of blood flow to the brain, producing brief neurologic dysfunction lasting less than 24 hours, often minutes, with symptoms resolving completely. TIA symptoms like weakness or vision changes usually precede a full stroke, but severe headache, vomiting, seizure, and unresponsiveness, especially with severe hypertension (normal BP is < 120/80 mm Hg), strongly suggest a more severe, active event like bleeding. Choice B rationale A hemorrhagic stroke is caused by rupture of a blood vessel in the brain, leading to bleeding into the brain tissue or surrounding spaces. This type of stroke often presents with the sudden onset of a severe headache (the "worst headache of my life"), vomiting, rapid deterioration of consciousness, and seizures, particularly in the setting of severe uncontrolled hypertension (198/110 mm Hg), which is a major risk factor for vessel rupture. Choice C rationale A thrombotic stroke is an ischemic stroke caused by a blood clot (thrombus) that forms in an artery supplying the brain, often due to atherosclerosis. Symptoms typically have a more gradual onset, sometimes occurring over hours or days, and while headache can occur, the sudden, explosive onset with severe headache, vomiting, seizure, and profound unresponsiveness is less characteristic than for a hemorrhagic event. Choice D rationale An embolic stroke is an ischemic stroke caused by a traveling clot (embolus), often originating from the heart (e.g., atrial fibrillation) or carotid arteries, that lodges in a cerebral vessel. Embolic strokes are usually very sudden in onset but are not typically associated with the triad of excruciating headache, vomiting, and seizure leading to unresponsiveness, which are hallmarks of the increased intracranial pressure seen with a large intracerebral hemorrhage.