Data collection
Blood samples were obtained on admission, on the day of TAVR (within two hours after valve implantation) and at discharge. NLR was calculated on admission, on day of TAVR, and at discharge by dividing the number of neutrophils by the number of lymphocytes.
Routine transthoracic echocardiography (TTE) was performed upon hospital admission and discharge, and standard measurements were assessed, including left ventricular ejection fraction (LVEF), and mean transaortic pressure gradient (PG). Computed tomography angiography (CT) was performed before TAVR procedure to assess annular dimensions (area, perimeter, maximum and minimum diameters), eccentricity index (1-minimum diameter/maximum diameter), cover index (100 X (prosthesis diameter-mean annulus diameter)/prosthesis diameter), valve index (100 X (prosthesis diameter/LVOT diameter)). For the assessment of calcification, the FACT score was used (12), while the calcification of single leaflet was qualitatively evaluated with 3 points grading system (1, mild, 2, moderate, 3, severe).