ACUSON Cypress™ Operator’s Manual
6-19
Cardiac Formulas and References
Cardiac Output
Cubed
SV is stroke volume cubed (ml).
HR is heart rate (bpm).
l/min
Cardiac Output
Teichholz
SV is stroke volume Teichholz (ml).
HR is heart rate (bpm).
l/min
Cardiac Index
Cubed
CO is Cardiac Output cubed (l/min).
BSA is Body Surface Area (m
2
).
l/min/m
2
Cardiac Index
Teichholz
CO is Cardiac Output Teichholz (l/min).
BSA is Body Surface Area (m
2
).
l/min/m
2
LV Mass
IVSd is interventricular septum diastole (cm).
LVIDd is left ventricular internal diameter diastole (cm).
LVPWd is left ventricular posterior wall diastole (cm).
g
LV Mass Index
(LVMI)
LV Mass (g).
BSA is Body Surface Area (m
2
).
g/m
2
Body Surface
Area
(BSA)
W is weight (kg) (range: 0.5—160.0 kg).
H is height (cm) (range: 15.0—204.0 cm).
m
2
TABLE 30.
M-Mode Formulas (Cardiac)
Type
Formula
Units
CO
SV
HR
•
(
)
1000
--------------------------
=
CO
SV
HR
•
(
)
1000
--------------------------
=
CI
CO
BSA
-----------
=
CI
CO
BSA
-----------
=
LV
Mass
0.8 1.04
(
)
IVSd
LVIDd
LVPWd
+
+
(
)
3
LVIDd
3
–
(
)
0.6
+
=
LVMI
LV
Mass
BSA
-----------------------
=
BSA
0.007184
W
kg
0.425
H
cm
0.725
(
)
=
