Keywords : aortic annulus, aortic stenosis, aortic valve area, aortic valve, apical window, as, bicuspid valve, color Doppler, continuous wave Doppler, CW Doppler, degenerative stenosis, left ventricular outflow tract, LVOT diameter, LVOT, post inflammatory aortic stenosis, pulsed wave Doppler, pw Doppler, raphe, right sternal border, RSB, Society of Radiologists in Ultrasound, SRU, SSN, subcostal window, suprasternal notch, tricuspid valve