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BackgroundThe quantification of tricuspid regurgitation(TR) using three-dimensional(3D) proximal isovelocity surface area (PISA)derived effective regurgitant orifice area (EROA) is feasible in functional TR. The aim of our study was to explore thediagnostic accuracy and utility of 3D PISA EROA in a larger population of different etiologies. MethodsOne hundred and seven patients with confirmed TR underwent 2D and 3D transthoracic echocardiography (TTE). 3D PISA EROA was calculatedand EROAdoi:10.21203/rs.3.rs-50260/v1 fatcat:gwue7mm3cvcrrkqhmjpfkbmr5a