Color Doppler diagnosis of mechanical prosthetic mitral regurgitation: Usefulness of the flow convergence region proximal to the regurgitant orifice

摘要: In prosthetic or paravalvular mitral regurgitation, transthoracic color Doppler flow mapping can sometimes fail to detect the regurgitant jet within left atrium because of shadowing by valve. To overcome this limitation, we assessed utility visualization convergence region (FCR) proximal orifice in 20 consecutive patients with mechanical regurgitation documented surgery and cardiac catheterization (13 patients). addition, studied 33 normally functioning prostheses. studies were performed apical, subcostal, parasternal long-axis views. An FCR was detected 95% (19 20) regurgitation. A area 60% (12 patients. 18 19 Doppler-detected FCR, site leak correctly identified observing location FCR. trivial eight a prosthesis; none an identified. Thus is superior diagnosis Moreover, permits localization good accuracy.