FujiFilm SonoSite Edge II User Manual page 121

Delta Pressure: Delta Time (dP:dT) in mmHg/s
Otto, C.M. Textbook of Clinical Echocardiography. 2nd ed., W.B. Saunders Company, (2000), 117-118.
32 mmHg/time interval in seconds
E:A Ratio in cm/sec
E:A = velocity E/velocity A
E/Ea Ratio
Reynolds, Terry. The Echocardiographer's Pocket Reference. 2nd ed., School of Cardiac Ultrasound, Arizona Heart
Institute, (2000), 225.
E Velocity/Ea velocity
where:
E velocity = Mitral Valve E velocity
Ea = annular E velocity, also known as: E prime
2
Effective Regurgitant Orifice (ERO) in mm
Oh, J.K., J.B. Seward, and A.J. Tajik. The Echo Manual. 3rd Edition, Boston: Philadelphia: Lippincott Williams and
Wilkins, (2007), 74-76.
ERO = MV Flow Rate/MR Vel * 100
Ejection Fraction (EF), percent
Schiller, N.B., Shah, P.M., Crawford, M.,et. al. "Recommendations for Quantitation of the Left Ventricle by Two-
Dimensional Echocardiography." Journal of American Society of Echocardiography. September-October
(1989), 2:364.
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
ET = time between velocity cursors in milliseconds
Measurement publications and terminology 115