Prosthesis-Patient Mismatch After Aortic Valve Replacement.
Prosthesis-patient mismatch (PPM) occurs when the effective orifice area (EOA) of a normally functioning prosthesis is too small in relation to the patient's body size, resulting in abnormally high postoperative gradients. PPM is frequent following aortic valve replacement (AVR), and it is associated with increased risk of morbidity and mortality proportionally to its severity. Differential diagnosis between PPM and prosthetic valve stenosis is made by comparing the measured valve effective orifice area, by assessing the changes in valve area and gradient during follow-up and by evaluating leaflet morphology and mobility. Preventive strategies to avoid or minimize PPM should be implemented especially in the patients who are at high risk for severe PPM and in those who have vulnerability factors to PPM. Transcatheter AVR may be superior to surgical AVR for the prevention of PPM and associated adverse cardiac events, particularly in the subset of patients with a small (<21 mm) aortic annulus. In this article, we discuss the most updated data regarding the diagnosis, clinical impact, and prevention of PPM after AVR.
Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, 2725 Chemin Sainte-Foy, Québec, Québec, G1V-4G5, Canada.
Abdellaziz
A
Dahou
Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, 2725 Chemin Sainte-Foy, Québec, Québec, G1V-4G5, Canada.
Haïfa
H
Mahjoub
Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, 2725 Chemin Sainte-Foy, Québec, Québec, G1V-4G5, Canada. philippe.pibarot@med.ulaval.ca.
Philippe
P
Pibarot
Aortic valve replacement; Doppler echocardiography; Prosthesis-patient mismatch; Prosthetic heart valves; Transcatheter aortic valve replacement
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