The reduction in valve aperture only causes haemodynamic abnormality when it is approximately 1/4 of normal.
Haemodynamic abnormalities present in this condition include:
- systolic gradient across the valve - this is when the pressure during systole is significantly higher in the left ventricle than in the aorta
- left ventricular hypertrophy:
- increased left ventricular work results leads to the development of ventricular hypertrophy
- left ventricular dilatation does not occur until there is left ventricular failure or aortic regurgitation is also present
- post-stenotic dilatation - this is localised dilatation of the aorta distal to the obstruction resulting from the lateral force by the turbulence of the jet of blood
Last reviewed 01/2018