A 67-Year-Old Man Presented to the Emergency with Right-Sided Weakness

A 67-year-old man presented to the emergency with right-sided weakness. The patient has a history of hypertension. The patient was diagnosed with atrial fibrillation 3 years ago, but he did not seek medical advice, nor did he take any medication. On physical examination, BP 165/100 mm Hg and pulse are 150/min and irregular. On physical examination, he has right-sided hemiparesis, with a right-sided facial droop. Brain CT scan of the patient confirmed the diagnosis of ischemic stroke, with no evidence of hemorrhage. The stroke is believed to be caused by an embolic event that originated in?

A) Left Ventricular Cavity
B) Pulmonary Veins
C) Aortic Valve
D) Left Atrial Appendage
E) Right Atrial Appendage