Table 1

 Aetiology of aortic regurgitation (AR)

*Disorders leading to acute AR.
VSD, ventricular septal defect.
Primary valve disease
Rheumatic
Congenital:Bicuspid aortic valve
Outlet supracristal VSD
Discrete subaortic stenosis
Endocarditis*
Other inflammatory disorders
Degenerative
Traumatic leaflet rupture*
Secondary AR
Aortic root dilatation
Aortic dissection*Damage to aortic annulus
Prolapsing intimal flap with intact leaflets and annulus