Myocardial Performance Time or Tei Index

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Calculator

Systole Start Time:	msec
Systole End Time:	msec
Ejection Start Time:	msec
Ejection End Time:	msec

IMP:	%

Status	Value
Normal	< 40 %
Mild Dysfunction	40-60 %
Mod Dysfunction	60 - 100 %
Severe Dysfunction	> 100%
	Table

How to calculate a IMP.

Step 1: A CWD of the LVOT, RVOT, MV or TV. The index of myocardial performance compares mechanical systole (A) to the ejection time period (B). Alternatively, the ejection period for a mitral/tricuspid regurgitant jet can be used for the ejection period (B) since, for mitral/tricuspid regurgitation, the ejection period and the mechanical systolic period are the same. As the ejection time period converges on the mechanical systolic period, the ejection force is decreasing.

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