CSE - CardioMath

Aortic Valve Velocity Ratio	LV EF (Modified Quinones Equation)	Myocardial Performance Index (RV)
AVA (Continuity Equation VTI)	LV EF (Simplified Quinones Equation)	PCWP by E/Ea (Nagueh Formula)
AVA (Continuity Equation V_Max)	LV Fractional Shortening	PISA (Mitral regurgitation)
dP/dt (LV contractility)	LV Mass and LV Mass Index	PISA (Mitral stenosis)
dP/dt (RV contractility)	Mitral valve area (PHT)	Qp/Qs
Left atrial pressure (MR)	Mitral Valvuloplasty Score (MGH)	RVSP (TR)
LA Volume (Biplane Method)	Modified Bernoulli Equation	Stroke Volume, Cardiac Output
LV EF (Dumesnil Method)	Myocardial Performance Index (LV)

Stroke Volume, Cardiac Output

LVOT				mm
LVOT VTI				cm
HR				bpm

SV		mL
Normal	60-120	mL
CO		L/min
Normal	4-8	L/min

The Doppler VTI method in estimating stroke volume and cardiac output correlates well with results of concurrent thermodilution cardiac output determinations in patients without significant left-sided valvular regurgitation.

SV =

π *

LVOT

* LVOT VTI

CO =

SV * HR

1000

Variable	Definition
Input
LVOT	Left ventricular outflow tract diameter (mm)
VTI₁	LVOT subvalvular velocity time integral (cm)
HR	Heart rate (bpm)
Output
SV	Stroke Volume (mL)
CO	Cardiac Output (L/min)

References

	Huntsman LL, et al. Noninvasive Doppler determination of cardiac output in man-clinical validation. Circulation 1983; 106:1057-1065.

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Author: Dr. Chi-Ming Chow

Developer: Edward Brawer

Disclaimer: The calculators provided are not meant to be a substitute for professional advise and are not to be used for medical diagnosis. All calculations must be confirmed before clinical use or diagnostic purposes by qualified medical professionals. The authors make no claims of the accuracy of the information contained herein. The authors make no claims whatsoever, expressed or implied, about the authenticity, accuracy, reliability, completeness or timeliness of the material, software, text, graphics and links given. In no event shall the authors, its suppliers, affiliates or any third parties be liable in any manner whatsoever for any damage arising upon use of any information provided.