... 3 .13 )Normal anatomy and physiology57Three-chamber (11 0 14 0°) A2 P2 (d)Five-chamber (0° and anteflex) A1 P1 A2 P2 (e)Fig. 3.9a, b, c, d, e (cont.)MVLmotion (Mmode) (Fig. 3 .10 )D ... Cn > LV C nNormal anatomy and physiology65Right PA Left PA 9 13 mm 8 16 mm Main PA Asc 12 –23 mm aorta Annulus 11 17 mm RVOT 14 –29 mm Fig. 3 .19 Descending aortaCommences ... 3 .15 Flow velocity depends on:COSVRAV areaAV Vmax= 1. 35 m/s (1. 0 1. 7 m/s)LVOT Vmax= 0.9 m/s (0.7 1. 1 m/s)Tricuspid valveThree leaflets: anterior (largest)posteriorseptal (Fig. 3 .15 )PMs:...