ALB and atrial fibrillation: In regard to patient factors, advanced age, female sex, chronic kidney disease, heart failure, and atrial fibrillation have all been linked to prolonged LOS.6, 7, 8, 9, 10 Various markers of frailty including walk tests, grip strength, serum albumin, activity of daily living assessments, skeletal muscle indices, and preoperative mental acuity tests have been found to influence LOS among others.11, 12, 13 Reduced pre-TAVR left ventricular function and low mean aortic valve gradients have been implicated in delayed discharge.8