Effect of depressed left ventricular function on hemodynamics of normal St. Jude medical prosthesis in the aortic valve position
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Cited by (23)
Dysfunction of bileaflet aortic prosthesis: Accuracy of echocardiography versus fluoroscopy
2013, JACC: Cardiovascular ImagingHigh trans-prosthetic gradients and prosthetic aortic valve dysfunction: The need for an accurate and multimodality imaging approach
2012, Journal of Cardiovascular EchographyCitation Excerpt :It has been demonstrated that to avoid any significant gradient at rest or during exercise, the indexed EOA of an aortic valve prosthesis should ideally be no less than 0.85 to 0.90 cm2/m2. On the basis of this relationship, PPM is considered to be hemodynamically insignificant if the indexed- EOA is >0.85 cm2/m2 (normal), moderate if between 0.65 and 0.85 cm2/m2, and severe if <0.65 cm2/m2.2–14 Such categorization is important because the impact of PPM on clinical outcomes increases with severity.
Normal Values for Doppler Echocardiographic Assessment of Heart Valve Prostheses
2003, Journal of the American Society of EchocardiographyClinical outcome in patients with 19-mm and 21-mm St. Jude aortic prostheses: Comparison at long-term follow-up
2002, Annals of Thoracic SurgeryQuantitative assessment of mechanical prosthetic valve area by 3-dimensional transesophageal echocardiography
2001, Journal of the American Society of EchocardiographyRole of cine-fluoroscopy, transthoracic, and transesophageal echocardiography in patients with suspected prosthetic heart valve thrombosis
2000, American Journal of CardiologyCitation Excerpt :All had small-sized aortic prostheses and normal ventricular function. The pressure gradient across the aortic valve may be affected by both valvular (i.e., prosthesis size and type) and extravalvular (i.e., heart rate, ventricular function, cardiac output) variables.18 Baumgartner et al19 showed that in patients with St. Jude Medical bileaflet valves, Doppler gradients may be significantly higher than catheter gradients because of “pressure recovery phenomenon” that leads to high localized pressure gradients.