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Chirurgia 2006 December;19(6):427-30

Copyright © 2006 EDIZIONI MINERVA MEDICA

language: English

Hemodynamic performance of the aortic prosthesis by stress echocardiography

Sadeghian H., Kamangari A., Marzban M., Hossein Mandegar M., Darvish S., Fallah N.

Department of Cardiovascular Research, Tehran Heart Center Tehran University of Medical Science, Tehran, Iran


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Aim. To study the effect of prosthetic aortic valve size on hemodynamic performance at rest and after exercise.
Methods. Twelve patients (mean age 40.5 years) who had underwent aortic valve replacement (AVR) 61 months ago because of severe aortic stenosis were evaluated.
Results. Nine patients received St-Jude and 3 patients received other types of prosthetic valves .Sixty percent of patients had ideal hemodynamic results at rest and peak exercise (group A1), 42% of patients had good hemodynamic results at rest but inappropriate at peak exercise (group A2) and 42% of patients had inappropriate hemodynamic results at rest (group B). Patient annulus index is significantly different between group A1 and B but the difference of annulus index between group AI and AII has a trend for being significant. Peak gradient and mean gradient increased significantly with exercise. Decreases of effective orifice area, effective orifice area index and performance index were also significant at peak exercise. None of our 12 patients had mismatch at rest, but 6 patients had mismatch at stress. Patient annulus index has a significant correlation with mismatch at peak exercise.
Conclusions. According to this study, we may consider aortic root enlargement when the patient annulus index is small.

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