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Verstreken tijd (ET) in msec
ET = tijd tussen snelheidscursors in milliseconden
Volume linkeratrium
Lang R. et al. "Recommendations for Cardiac Chamber quantification by Echocardiography in Adults: An
update from the American Society of Echocardiography and European Association of Cardiovascular
Imaging." J Am Soc Echocardiography, January (2015), 20-28.
LA Vol = π/4(h) Σ(D1)(D2)
waarbij:
LA Vol = volume linkeratrium in ml
h = hoogte van gestapelde ovale schijven die het LA vormen
D1 = orthogonale korte as
D2 = orthogonale lange as
Volume linkerventrikel: eenvlaksmethode in ml
Schiller, N.B., P. M. Shah, M. Crawford, et.al. "Recommendations for Quantitation of the Left Ventricle by
Two-Dimensional Echocardiography. " Journal of American Society of Echocardiography. September-October
1989, 2:362.
n
π
L
2
-- -
-- -
=
V
a
i
4
n
=
i
1
waarbij:
V = volume
a = diameter
n = aantal segmenten (n = 20)
L = lengte
i = segment
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