A 70-year-old man comes to the ·office 4 weeks after experiencing an ischemic stroke. His medical history is significant for a long history of hypertension, diabetes, coronary artery disease, congestive heart failure, and atrial fibrillation. Vital signs are unremarkable. BMI is 23.8 kg/m2. Cardiovascular examination reveals an irregularly irregular rhythm. The patient is right-handed. Only the right side of his face is shaved. When asked to raise his left arm, he raises his right arm. When asked to fill in the numbers of a clock, he puts numbers only on the right side.