Traditionally vasodilators are contraindicated in patients with aortic stenosis. Although no controlled data exists it is believed to be hazardous to reduce afterload, including treatment with angiotensin converting enzyme (ACE) inhibitors, in these patients with aortic stenosis due to the risk of increased transaortic gradient and thus severe hypotension and myocardial hypoperfusion. There is now growing evidence both experimental and clinical that ACE inhibition could have beneficial effects on left ventricular hypertrophy, diastolic function, acute, and possibly chronic haemodynamic parameters in patients with aortic stenosis.