An 85-yeаr-оld mаle with а past medical histоry оf diabetes mellitus and atrial fibrillation is brought to the ER with an acute right sided facial droop, right arm weakness and difficulty speaking. The patient's daughter found him in this state and called 911. She told the paramedics the patient was last seen two days ago at a family dinner and seemed normal at that time. What diagnosis must be considered for this patient?