Abstract
Echocardiography is the method of choice for evaluating prosthetic valve function. In almost all the studies reporting early and long-term results after aortic valve replacement with a biological substitute, conclusions regarding valve performances are mainly based on echocardiographic examination at rest. Anyway, is well known that normally and abnormally functioning prostheses can give similar gradients at rest evaluation. Therefore echocardiographic examination after exercise can be very helpful in assessing changes in valve hemodynamics, ventricular function and clinical status under stress conditions.
Highlights
Echocardiography is the method of choice for evaluating prosthetic valve function
Effective Orifice Area (EOA) and Effective Orifice Area Index (EOAi) raised from 1.86 ± 0.69 cm2 to 1.96 ± 0.71 cm2 (p < 0.0001), and from 1.05 ± 0.37 cm2 to 1.10 ± 0.38 cm2 (p < 0.0001) respectively, without significant differences between the implanted valve sizes
Use of exercise echocardiography to assess changes in hemodynamics and function of aortic bioprostheses can be helpful in the choice of appropriate aortic valve substitutes
Summary
Echocardiography is the method of choice for evaluating prosthetic valve function. In almost all the studies reporting early and long-term results after aortic valve replacement with a biological substitute, conclusions regarding valve performances are mainly based on echocardiographic examination at rest. Anyway, is well known that normally and abnormally functioning prostheses can give similar gradients at rest evaluation. Echocardiographic examination after exercise can be very helpful in assessing changes in valve hemodynamics, ventricular function and clinical status under stress conditions. Most prosthetic aortic valves are inherently stenotic, and for small sizes, a moderate or severe patient-prosthetic mismatch (PPM) may be occasional-. Aim of this study was to evaluate by transthoracic echo the hemodynamic behaviour and the changes in dimensional data of a stentless aortic bioprosthesis between rest and exercise conditions
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