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European Journal of Cardio-Thoracic Surgery, Vol 11, 473-475, Copyright © 1997 by European Association for Cardio-thoracic Surgery

ARTICLES

Hemodynamic evaluation of the Carbomedics R, St Jude Medical HP and Sorin-Bicarbon valve in patients with small aortic annulus

G Noera, P Pensa, M Lamarra, R Mascagni, A Cremonesi and G Balestra
Department of Cardiothoracic Surgery, Casa di Cura Villa Maria Cecilia, Cotignola (RA), Italy.

A Doppler echocardiographic study was performed to evaluate the hemodynamic performance of three 19 mm size currently used bileaflet valve prosthesis (St Jude Medical Hydrodinamic Plus, Sorin-Bicarbon and Carbomedic Reduced) implanted in aortic position. METHODS: Patients, 30, with the same profile receiving 19 mm size valve (ten for each valve type) were selected when body surface area (BSA) was > 1.7 m2. Doppler echocardiography was carried out at rest and after exercise, 60 days after surgery. Peak (Pg) and mean (Mg) gradients across the valve were recorded: the effective orifice area (EOA), and performance index (PI) were calculated. RESULTS: No significant differences were observed between St Jude Medical and Sorin Bicarbon as far as peak and mean gradient, effective orifice area and performance index at rest and after exercise. A significant difference (P < 0.05) was demonstrated in the above mentioned parameters when Carbomedics-R valve were tested. This type of valve showed a lower EOA and PI with higher Pg and Mg gradient both at rest and after exercise. CONCLUSION: The St Jude Hydrodymanic plus (Hp) and Sorin Bicarbon valves had similar performance and a better hemodynamic trend when compared to the Carbomedics-R valve in patients with large body surface areas. The Carbomedics-R valve shows a ineffective use of the total area of the prosthesis both at rest and after exercise.


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Copyright © 1997 European Association for Cardio-Thoracic Surgery. Published by Elsevier. All rights reserved.