title: Doppler echocardiographic diagnosis of porcine bioprosthetic cardiac valve malfunction.
mesh_terms: D000328:Adult; D000368:Aged; D001705:Bioprosthesis; D004452:Echocardiography / Q000379:methods*; D004868:Equipment Failure; D005260:Female; D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D006801:Humans