Fig. 2
From: Pearls and pitfalls in comprehensive critical care echocardiography
Consideration of stroke volume in valvular lesion severity assessment. In a hyperdynamic state trans-valvular gradients are commonly elevated, as in this example where aortic valve flows could indicate moderate stenosis if considered in isolation. A raised stroke volume and LVOTVTI can help identify falsely elevated flows. In aortic stenosis the VTI ratio between the LVOT and aortic valve can also be of use (Dimensionless Severity Index)