1. Non-invasive assessment of aortic stenosis by Doppler ultrasound;Hatle;Br Heart J,1980
2. Doppler assessment of mechanical aortic valve prostheses: effect of valve design and size of the aorta;Mascherbauer;J Heart Valve Dis,2004
3. Invasive versus echocardiographic evaluation of transvalvular gradients immediately post TAVR: demonstration of significant echocardiography-catheterization discordance;Abbas;Circ Cardiovasc Interv,2019
4. Comparison of transvalvular aortic mean gradients obtained by intraprocedural echocardiography and invasive measurement in balloon and self-expanding transcatheter valves;Abbas;J Am Heart Assoc,2021
5. Errors in pressure gradient measurement by continuous wave Doppler ultrasound: type, size and age effects in bioprosthetic aortic valves;Stewart;J Am Coll Cardiol,1991