title: Determination of pre- and postoperative flow obstruction in patients undergoing closed mitral commissurotomy from non-invasive ultrasound Doppler data and cardiac output.
abstract: A non-invasive ultrasound Doppler system and indwelling thermodilution catheter system were used to determine the pre- and postoperative mitral flow obstruction in eight adults undergoing closed mitral commissurotomy. The effective valve area (Ae) was used as a measure of the obstruction. In the eight patients Ae was 1.08 +/- 0.34(SD) cm. 2 preoperatively and increased to 1.71 +/- 0.43(SD) cm. 2 postoperatively. The technique used in the investigation appears useful for the evaluation of surgical procedures designed to reduce the mitral flow obstruction.
mesh_terms: D000328:Adult; D002302:Cardiac Output; D005260:Female; D006350:Heart Valve Prosthesis; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D013815:Thermodilution / Q000379:methods; D014465:Ultrasonics / Q000295:instrumentation; D014463:Ultrasonography