Echocardiographic evaluation of the stent mounted aortic bioprosthetic valve in the mitral position. In vitro and in vivo studies
| Autor: | P L Tecklenberg, Richard L. Popp, Michael S. Horowitz, Donald C. Harrison, Daniel J. Goodman |
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| Rok vydání: | 1976 |
| Předmět: |
medicine.medical_specialty
Swine medicine.medical_treatment Transplantation Heterologous Diastole In Vitro Techniques Bioprosthetic valve In vivo Physiology (medical) Internal medicine medicine Ventricular outflow tract Animals Humans cardiovascular diseases Interventricular septum Aorta business.industry Mitral valve replacement Stent medicine.anatomical_structure Echocardiography Heart Valve Prosthesis cardiovascular system Cardiology Test chamber Mitral Valve Cardiology and Cardiovascular Medicine business |
| Zdroj: | Circulation. 54(1) |
| ISSN: | 0009-7322 |
| Popis: | Echocardiograms were performed on 20 clinically stable patients following mitral valve replacement with glutaraldehyde-preserved porcine aortic heterografts and three patients with antibiotic sterilized aortic homografts mounted in the mitral position. Such valves were evaluated in a test chamber at varied flow rates resulting in improved understanding of movements seen with the echocardiogram in vivo. The technique for recording the valvular stent and leaflets is described and a method for measuring several parameters is demonstrated. Initial diastolic slope averaged 2.4 +/- 0.5 cm/sec (range 1.9 to 3.3 cm/sec). Left ventricular outflow tract measured from the anterior portion of the stent to the interventricular septum averaged 1.5 +/- 0.5 cm at end-diastole and 1.3 +/- 0.6 cm at end-systole. Leaflet excursion averaged 1.5 +/- 0.3 cm (with a range from 1.0 to 2.1 cm). The ratio of internal to external stent diameters averaged 0.66 +/- 0.05 (with a range from 0.56 to 0.74). |
| Databáze: | OpenAIRE |
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