Comparison of hemodynamic performances of St. Jude Medical and CarboMedics 21 mm aortic prostheses by means of dobutamine stress echocardiography

The Journal of Thoracic and Cardiovascular Surgery
M B IzzatG D Angelini

Abstract

Dobutamine stress Doppler echocardiography was used to compare the hemodynamic performance of two small aortic bileaflet prostheses. Nineteen patients (14 female, mean age 64 years) who had undergone aortic valve replacement with 21 mm bileaflet valve prostheses (St. Jude Medical valve, n = 9, or CarboMedics valve, n = 10) were studied. Dobutamine infusion was started at a rate of 5 micrograms.kg-1.min-1 and increased to 10 and 20 micrograms.kg-1.min-1 at 15-minute intervals. Under maximum stress, heart rate and cardiac output increased by 70% and 120%, respectively, and mean arterial blood pressure decreased by 9%. Pulsed-wave and continuous-wave Doppler studies were performed at rest and at the end of each stage. Velocity ratio, effective orifice area, performance index, and discharge coefficient of the valve were calculated, and peak and mean velocities and pressure drops across the prostheses were measured. Dobutamine infusion produced similar increases in cardiac output in all patients. Effective orifice areas, discharge coefficients, and performance indexes were comparable for the two valve groups both at rest and maximum stress. Transvalvular velocities and pressure drops were also similar in the two valve groups. Transv...Continue Reading

References

Jul 1, 1978·Circulation·S H Rahimtoola
May 1, 1975·The American Journal of Cardiology·J D Bristow, E L Kremkau
May 15, 1992·The American Journal of Cardiology·P A Marcovitz, W F Armstrong
May 1, 1991·International Journal of Cardiology·J ChambersE Sowton
Oct 1, 1991·The Annals of Thoracic Surgery·M ButterfieldT J Spyt
Aug 1, 1986·Journal of the American College of Cardiology·I P PanidisG S Mintz
May 1, 1988·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·S A Reisner, R S Meltzer
Oct 1, 1986·The American Journal of Cardiology·M Y RashtianS H Rahimtoola
Mar 1, 1986·Journal of the American College of Cardiology·K B SagarD W Romhilt
Jan 1, 1984·British Heart Journal·H IhlenE Myhre
Feb 1, 1984·Journal of the American College of Cardiology·R J GrayA Yoganathan
Jul 1, 1981·The Annals of Thoracic Surgery·H V SchaffR K Brawley
Feb 1, 1993·Journal of the American College of Cardiology·J ChambersE Sowton

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Citations

Feb 27, 1999·The Japanese Journal of Thoracic and Cardiovascular Surgery : Official Publication of the Japanese Association for Thoracic Surgery = Nihon Kyōbu Geka Gakkai Zasshi·T ShimabukuroN Nagano
Oct 12, 2000·Journal of the American College of Cardiology·P Pibarot, J G Dumesnil
Jun 24, 2004·Echocardiography·Wen-Chih WuAra Sadaniantz
Sep 21, 2006·Journal of Cardiothoracic Surgery·Giovanni MinardiFrancesco Musumeci
Dec 21, 2011·Journal of Cardiothoracic Surgery·Jon OffstadJan L Svennevig
Dec 10, 1999·The Annals of Thoracic Surgery·M B IzzatG D Angelini
May 1, 1997·The Journal of Thoracic and Cardiovascular Surgery·R De PaulisL Chiariello
Feb 9, 2002·The Annals of Thoracic Surgery·Aldo D MilanoUberto Bortolotti
Sep 27, 2005·The Annals of Thoracic Surgery·Ralf GuenzingerRuediger Lange
Jun 19, 2001·European Journal of Cardio-thoracic Surgery : Official Journal of the European Association for Cardio-thoracic Surgery·I KnezB Rigler
Dec 1, 1996·Artificial Organs·S S WangF Y Lin
Apr 8, 1999·Journal of Cardiac Surgery·F da CostaI S Costa

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