FujiFilm SonoSite X-Porte User Manual page 193

FAC (RV)
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." Journal of the American Society of Echocardiograph. January (2015), 28: p.1-39.
RV FAC (%) = (RV EDA – RV ESA) / RV EDA * 100
where:
RV FAC = Right Ventricular Fractional Area Change (%)
RV EDA = Right Ventricular End-diastolic area (cm^2)
RV ESA = Right Ventricular End-systolic area (cm^2)
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
Isovolumic Relaxation Time (IVRT) in msec
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual. 3rd ed., Philadelphia: Lippincott, Williams, and Wilkins,
(2007), p.123-124.
[time a - time b]
where:
time a = mitral valve opening;
time b = aortic valve closure
IVC Percentage Collapse
Lyon, M., N. Verma. "Ultrasound guided volume assessment using inferior vena cava diameter." The Open
Emergency Medicine Journal. 2010, 3: p.22-24.
(IVCd exp – IVCd insp)/IVCd exp
where:
expiration (exp) = maximum diameter (Max D)
inspiration (insp) = minimum diameter (Min D)
Left Atrium/Aorta (LA/Ao)
Feigenbaum, H. Echocardiography. Philadelphia: Lea and Febiger, (1994), p.206, Figure 4-49.
Measurement references 6-7