A 67-year-old male presents to the accident
and emergency department with a history of headache, vomiting and unsteadiness
on his feet. He also complains of dizziness and has slurred speech He is a
known hypertensive and is on atenolol and bendroflumethiazide.
He is transferred to the medical admissions
unit and you are called to see him. You find him to be drowsy and unable to
cooperate with a full neurological examination. His blood pressure is 220/130
The most likely cause of this patientís