CSE - CardioMath

	Duke Treadmill Score		Maximum Predicted Heart Rate (DOB)		Mets & VO₂ (Treadmill)
	Maximum Predicted Heart Rate (Age)		Max. Predicted Heart Rate Achieved		Rate Pressure Product

LV Ejection Fraction (Simplified Quinones Equation)

LVEDD				mm
LVESD				mm
Apex

LVEF				%
Normal		>55-60%		%

An even simpler adaptation uses the commonly measured end-diastolic and end-systolic diameters of the LV in the parasternal long axis view, with a correction of the apex as follows...

LVEF =

LVEDD² - LVESD²

LVEDD²

* 100% + K

Variable	Definition
Input
LVEDD	LV end-diastolic dimension (mm)
LVESD	LV end-systolic dimension (mm)
K	Correction for apical contraction
	+10% Normal apex
	+5% Hypokinetic apex
	+0% Akinetic apex
	-5% Dyskinetic apex
	-10% Apical aneurysm
Output
LVEF	Ejection Fraction (%)
Normal	>55-60%

References

	Weyman AE. Principles and practice of echocardiography. 2nd ed. 1994 p. 605-6

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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.