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Measurement references 6-13
Right Atrial Volume
Lang, R., M. Bierig, R. Devereux, et al. “Recommendations for chamber quantification: a report from the
American Society of Echocardiography’s guidelines and standards committee and the chamber
quantification writing group, Developed in conjunction with the European Association of
Echocardiography, a branch of the European Society of Cardiology.” J
ournal of the American Society of
Echocardiograph. 2005, 18: p.1440-1463.
RA Vol = π/4(h)

D1)
2
where:
RA Vol = Right Atrial Volume in ml
h = Height of stacked circular disks making up the RA
D1 = Orthogonal minor axis
Right Atrial Volume Index
Wang, Y., J. Gutman, et al. “Atrial volume in a normal adult population by two-dimensional
echocardiography.”
Chest . (1984), 86: p.595-601.
RA Vol Index = RA Vol/BSA (ml/L2)
Right Ventricular Systolic Pressure (RVSP) in mmHg
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual . 3rd ed., Philadelphia: Lippincott, Williams, and Wilkins,
(2007), p.66.
RVSP = 4 * (VMax TR)
2
+ RAP
where:
RAP = Right Atrial Pressure
S/D
Reynolds, Terry. The Echocardiographer’s Pocket Reference . 2nd ed., School of Cardiac Ultrasound,
Arizona Heart Institute, (2000), p.217.
S velocity/D velocity
where:
S velocity = Pulmonary vein S wave
D velocity= Pulmonary vein D wave
Stroke Index (SI) in cc/m
2
Mosby’s Medical, Nursing, & Allied Health Dictionary , 4th ed., (1994), p.1492.
SI = SV/BSA
where:
SV = Stroke Volume
BSA = Body Surface Area