Quantification of pressure gradients across stenotic valves by Doppler ultrasound

Two-dimensional echocardiography has proven very useful in assessing valvular heart disease, but the technique is limited in certain groups of patients and is unable to quantify a transvalvular pressure gradient. Advances in the Doppler ultrasound techniques have made it possible to noninvasively measure velocity of flow across a stenotic heart valve and to calculate the pressure gradient. A commercially available, continuous and pulse wave...