Carbomedics and St. Jude Medical bileaflet valves: an in vitro and in vivo comparison
| Autor: | N A Weerasena, T.J. Spyt, M Butterfield, R T Johnston, John Fisher |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Pulmonary and Respiratory Medicine
Aortic valve medicine.medical_specialty medicine.medical_treatment Heart Valve Diseases Mean pressure Pulsatile flow Hemodynamics Prosthesis Design Prosthesis In vivo Mitral valve Internal medicine Humans Medicine Cardiac Output business.industry Models Cardiovascular General Medicine Echocardiography Doppler Blood pressure medicine.anatomical_structure Aortic Valve Heart Valve Prosthesis cardiovascular system Cardiology Mitral Valve Surgery Cardiology and Cardiovascular Medicine business Blood Flow Velocity |
| Zdroj: | European Journal of Cardio-Thoracic Surgery. 6:267-271 |
| ISSN: | 1010-7940 |
| DOI: | 10.1016/1010-7940(92)90110-j |
| Popis: | The hydrodynamic and haemodynamic function of 29 mm mitral and 23 mm aortic St Jude Medical (SJM) and CarboMedics (CM) heart valves have been compared in a pulsatile flow simulator in the laboratory and by doppler ultrasound in vivo. The laboratory studies showed that there was no significant difference in the pressure drop across the valves. The valves also had similar regurgitant volumes. Doppler ultrasound confirmed these results with a mean pressure drop of 12.9 +/- 5.5 mmHg across the CM aortic valves and 12.6 +/- 5.5 mmHg for the SJM aortic valves. The mean mitral diastolic pressure drops were 3.8 +/- 1.8 and 4.6 +/- 1.4 mmHg for the CM and SJM valves, respectively. Mild aortic regurgitation was detected in 5 of 14 patients in the CM group and 1 out of 6 patients in the SJM group, though none of the cases were clinically significant. Both the in vitro and in vivo results show these valves to have acceptable and comparable function. |
| Databáze: | OpenAIRE |
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