Doppler Echocardiographic Assessment of Normally Functioning Starr-Edwards, Carbomedics and Carpentier-Edwards Valves in Aortic Position
| Autor: | Chee Tek Siong, Barendra Chakraborty, Tan Lay Kheng, Ding Zee Pin, Susan Quek |
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| Rok vydání: | 1996 |
| Předmět: |
Adult
Male Aortic valve medicine.medical_specialty Duplex ultrasonography Adolescent medicine.medical_treatment Mean pressure Hemodynamics 030204 cardiovascular system & hematology Doppler echocardiography Prosthesis 03 medical and health sciences symbols.namesake 0302 clinical medicine Internal medicine Materials Testing medicine Humans 030212 general & internal medicine Pressure gradient Aged medicine.diagnostic_test business.industry Anatomy Middle Aged Echocardiography Doppler medicine.anatomical_structure Aortic Valve Heart Valve Prosthesis symbols Cardiology Female Cardiology and Cardiovascular Medicine business Doppler effect |
| Zdroj: | Angiology. 47:481-489 |
| ISSN: | 1940-1574 0003-3197 |
| Popis: | Doppler echocardiography was performed in 168 normally functioning aortic prostheses to determine acceptable pressure gradients across the commonly used valves and to establish the relationship between valve size and gradients. There were 82 Carbomedics (C), 63 Starr-Edwards (SE), and 23 Carpentier-Edwards (CE) valves. Peak and mean gradients across the prostheses were measured by use of the simplified Bernoulli equation. CarboMedics valve had a lower peak and mean gradient than Starr-Edwards and Carpentier-Edwards valve (P < 0.05 when compared with Starr-Edwards). The authors observed a weak inverse correlation between valve size and peak and mean gradients in CarboMedics and Carpentier-Edwards valves but not in the Starr-Edwards valve. For the CarboMedics valve the peak pressure gradient (PPG) was 26.1 ±8.2 mm Hg and the mean pressure gradient (MPG) was 14.7 ± 5.1 mm Hg; in Starr-Edwards valve the PPG was 32.8 ±9.1 mm Hg and the MPG was 19.5 ±5.6 mm Hg; in the Carpentier-Edwards valve the PPG was 28.7 ± 10.1 mm Hg and the MPG was 16.1 ± 5.2 mm Hg when size was not specified. The CarboMedics valves were noted to have a better hemodynamic profile in comparison with Starr-Edwards and Carpentier-Edwards prostheses. |
| Databáze: | OpenAIRE |
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