... 71aortic regurgitation 42 –6acute 42 , 77aetiology 43 colour flow mapping 42 , 43 , 44 endocarditis 77flow reversal at arch 42 , 44 , 45 , 46 severity grading 46 , 46 vena contracta width 42 , 46 aortic stenosis ... disease 41 , 42 calcification 82checklist for reporting 84 coarctation see coarctation of aortadiameters 79, 80, 81, 132, 133flow reversal at arch 42 , 44 , 45 , 46 relations, congenital disease ... 39 41 clues to aetiology 39Doppler measurements 39 40 grading from continuous-wavesignal 40 , 140 , 140 low flow 41 , 41 RV dilatation and 91severity assessment 40 , 40 aortic valveappearance...