M-Mode Formulas - Siemens ACUSON Cypress Operator's Manual

Cardiac Calculations
6-18

M-Mode Formulas

M-Mode Formulas (Cardiac)
TABLE 30.
Type Formula
Fractional
% FS
Shortening
(% FS)
LVd is diastolic dimension (cm).
LVs is systolic dimension (cm).
Fractional
% FT
Thickening–
Interventricu-
IVSs is Interventricular Septum in systole.
lar Septum
IVSd is Interventricular Septum in diastole.
(% FT)
Fractional
% FT
Thickening–
Left Ventricular
LVPWs is Left Ventricular Posterior Wall in systole.
Posterior Wall
LVPWd is Left Ventricular Posterior Wall in diastole.
(% FT)
Volume Cubed
V
LVID is left ventricular internal diameter (cm).
Volume
V
Teichholz
LVID is left ventricular internal diameter (cm).
Ejection
EF
Fraction Cubed
Vd is diastolic volume cubed (ml).
Vs is systolic volume cubed (ml).
Ejection
EF
Fraction
Teichholz
Vd is diastolic volume Teichholz (ml).
Vs is systolic volume Teichholz (ml).
Stroke Volume
SV
Cubed
Vd is diastolic volume cubed (ml).
Vs is systolic volume cubed (ml).
Stroke Volume
SV
Teichholz
Vd is diastolic volume Teichholz (ml).
Vs is systolic volume Teichholz (ml).
ACUSON Cypress™ Operator's Manual
⎛ ⎞
LVd LVs –
•
= -------------------------- 100
⎝ ⎠
LVd
⎛ ⎞
IVSs IVSd –
•
= ------------------------------ 100
⎝ ⎠
IVSd
⎛
LVPWs LVPWd –
= -------------------------------------------- -
⎝
LVPWd
3
= LVID
⎛ ⎞
7
3
( )
= --------------------------- - LVID
⎝ ⎠
2.4 + LVID
⎛ ⎞
Vd Vs –
•
= ------------------ - 100
⎝ ⎠
Vd
⎛ ⎞
Vd Vs –
•
= ------------------ - 100
⎝ ⎠
Vd
= Vd Vs –
= Vd Vs –
⎞
•
100
⎠
Units
%
%
%
ml
ml
%
%
ml
ml