Author(s)

M. Karlsson & D. Loyd

Abstract

The PIS A-method, Proximal Isovelocity Surface Area, is a method for quantifying regurgitant flow through the mitral valve. The volumetric flow is calculated as the velocity at the center line times the iso-vehcity area. Unfortunately, this method is correct only for a non-viscous fluid flowing towards an orifice with zero radius. In order to study effects from a viscous fluid as well as influences from an orifice with a finite radius, the PISA-method is modelled and analysed using computer simulations. The computer model may also be used to investigate possible influences from the design of an experimental model. 1 Introduction One of the most common malfunctions of heart valves is valve regurgitation. Regurgi- tation, in general, is the backward leakage of a va

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