Radius of proximal isovelocity surface area in the assessment of rheumatic mitral stenosis : Connecting flow to anatomy and hemodynamics

BACKGROUND: Echocardiographic assessment of left atrial pressure (LAP) in mitral stenosis (MS) is controversial. We sought to examine the role of the radius of the proximal isovelocity surface area (PISA-r) in the assessment of the hemodynamic status of MS after fixing the aliasing velocity (Val)