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MR ERO = (6,28 x MR PISA R² x MR Alias V) : MR Vmax

MR Vmax: CW, Apical 4C view.
MR PISA R:  CD, Apical 4C view.
MR Alias V: CD, Apical 4C view.


Example:
MR Vmax = 550 cm/s
MR PISA R = 0,99 cm
MR Alias V = 18 cm/s
MR ERO = (6,28 x 0,99² x 18) : 550 = 0,20 cm²