FujiFilm SonoLite S Serie Guia Del Usuario página 293

壓力梯度 (PGr)，單位 mmHG
Oh, J.K., J.B. Seward, and A.J. Tajik. The Echo Manual. 3rd Edition, Philadelphia: Lippincott, Williams, and Wilkins,
(2007), p.63-66.
2
PGr = 4 * ( 流速 )
峰值 E 壓力梯度 (E PG)
2
E PG = 4 * PE
峰值 A 壓力梯度 (A PG)
2
A PG = 4 * PA
峰值壓力梯度 (PGmax)
2
PGmax = 4 * PV
平均壓力梯度 (PGmean)
Echocardiographic Assessment of Valve Stenosis: EAE/ASE Recommendations for Clinical Practice Journal of
American Society of Echocardiography, (January, 2009), 4-5.
2
PG mean = sum(4v )/N
其中：
v = 間隔 n 之峰值流速
N = Riemann 總和中的間隔數量
Qp/Qs
Oh, J.K., J.B. Seward, and A.J. Tajik. The Echo Manual. 3rd Edition, Boston: Philadelphia: Lippincott Williams and
Wilkins, (2007), p.70-72.
Qp/Qs = SV Qp site/SV Qs site = RVOT SV/LVOT SV
其中：
RVOT SV = RVOT CSA* RVOT VTI = π/4 * RVOT 直徑
LVOT SV = LVOT CSA * LVOT VTI = π/4 * LVOT 直徑
都卜勒模式心搏量 (SV)，單位 mL
Oh, J.K., J.B. Seward, and A.J. Tajik. The Echo Manual. 3rd Edition, Boston: Philadelphia: Lippincott Williams and
Wilkins, (2007), p.69-71.
測量參考
* RVOT VTI
2
* LVOT VTI
2
291