FujiFilm SonoSite Edge II User Manual page 132

E/Ea Ratio
Reynolds, Terry. The Echocardiographer's Pocket Reference. 2nd ed., School of Cardiac Ultrasound,
Arizona Heart Institute, (2000), p.225.
E Velocity/Ea velocity
where:
E velocity = Mitral Valve E velocity
Ea = annular E velocity, also known as E prime
Effective Regurgitant Orifice (ERO) in mm
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual. 3rd ed., Lippincott, Williams, and Wilkins, (2007),
p.73-76, p.210.
ERO = MV Flow Rate/ MR Vel * 100
Ejection Fraction (EF), percent
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual.3rd ed., Lippincott, Williams, and Wilkins, (2007),
p.115-116.
EF = [(LVEDV – LVESV)/LVEDV)] * 100%
where:
EF = Ejection Fraction
LVEDV = Left Ventricular End Diastolic Volume
LVESV = Left Ventricular End Systolic Volume
Elapsed Time (ET) in msec
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual.3rd ed., Lippincott, Williams, and Wilkins, (2007), p.147,
Figure 9-8.
ET = time between velocity cursors in milliseconds
Heart Rate (HR) in bpm
HR = 3 digit value input by user or measured on M Mode and Doppler image in one heart cycle
Interventricular Septum (IVS) Fractional Thickening, percent
Laurenceau, J. L., M.C. Malergue. The Essentials of Echocardiography. Le Hague: Martinus Nijhoff, (1981),
p.71.
IVSFT = ((IVSS – IVSD)/IVSD) * 100%
where:
IVSS = Interventricular Septal Thickness at Systole
IVSD = Interventricular Septal Thickness at Diastole
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Measurement references