title: Detection of thrombotic obstruction of a Björk-Shiley prosthesis by Doppler echocardiography.
mesh_terms: D000328:Adult; D004452:Echocardiography; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D008943:Mitral Valve; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000175:diagnosis*; D011475:Prosthesis Failure; D013927:Thrombosis / Q000150:complications / Q000175:diagnosis*