Terason t3000 - Page 192

Chapter 7 - Working With Measurements Measuring Cardiac Exams
Terason t3000 / Echo Ultrasound System User Guide 192
Formulas Used for Measurements in the M-Mode Window
Fractional
Shortening%
LVd: diastolic dimension (cm)
LVs: systolic dimension (cm)
%
Fractional
Thickening% -
Interventricular
Septum
IVSs: interventricular septum
in systole
IVSd: interventricular septum
in diastole
%
Fractional
Thickening% -
Left Ventricular
Posterior Wall
LVPWs: left ventricular
posterior wall in systole
LVPWd: left ventricular
posterior wall in diastole
%
M-Mode Formulas
Name Variables Formula Units
Fractional
Shortening%
LVd: diastolic dimension
(cm)
LVs: systolic dimension
(cm)
%
Fractional
Thickening%
-
Interventricul
ar Septum
IVSs: interventricular
septum in systole
IVSd: interventricular
septum in diastole
%
Fractional
Thickening%
- Left
Ventricular
Posterior
Wall
LVPWs: left ventricular
posterior wall in
systole
LVPWd: left ventricular
posterior wall in
diastole
%
Volume
Cubed
LVID: left ventricle inside
diameter
ml
Volume
Teichholz
LVID: left ventricle inside
diameter
ml
Ejection
Fraction
Cubed
Vs: systolic volume cubed
(ml)
Vd: diastolic volume cubed
(ml)
%
Ejection
Fraction
Teichholz
Vs: systolic volume
Teichholz (ml)
Vd: diastolic volume
Teichholz (ml)
%
Stroke
Volume
Cubed
Vs: systolic volume cubed
(ml)
Vd: diastolic volume cubed
(ml)
ml
2D Formulas (Continued)
Name Variables Formula Units
%FS
LVd LVs–
LVd
----------------------------


100=
%FT
IVSs IVSd–
IVSd
---------------------------------


100=
%FT
LVPWs LVPWd–
LVPWd
-------------------------------------------------


100=
%FS
LVd LVs–
LVd
----------------------------


100=
%FT
IVSs IVSd–
IVSd
---------------------------------


100=
%FT
LVPWs LVPWd–
LVPWd
-------------------------------------------------


100=
VLVID
2
=
V
7
2.4 LVID+
----------------------------
LVID
3



=
EF
Vd Vs–
Vd
---------------------


100=
EF
Vd Vs–
Vd
---------------------


100=
SV Vd Vs–=