“…Many different types of medical comorbidities have been associated with delirium including history of stroke, diabetes mellitus, atrial fibrillation, hypertension, renal dysfunction, anemia, gastritis, hypoalbuminemia, and heart failure [13][14][15][16][17][18][19]. In addition, vascular risk factors have been associated with the development of POD following cardiac surgery, including atherosclerosis [20], peripheral artery disease, cerebrovascular disease [21], carotid artery stenosis, and smoking [22]. Some classes of medications have been found to be deliriogenic when administered in the preoperative period.…”