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on the wavelength/Cardiac,echo

EPSS (E-point septal separation)

by rltwnf 2013. 1. 22.
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EPSS (E-point septal separation)

 

 

I was asked about E-point septal separation, abbreviated as EPSS, during our faculty workshop last week and thought it would be useful to post some information on this topic. EPSS is a measurement obtained using M-mode echocardiography of the hear

t in the parasternal long-axis (PSLA) view through the LV septum and anterior mitral valve leaflet.

This measurement (in mm) represents the distance from the anterior septal endocardium to the maximum early opening point of the anterior mitral leaflet during early diastole and correlates with ejection fraction. An increased EPSS is specific for decreased ejection fraction. A normal EPSS is 6mm or less which correlates with a normal EF, between 6mm and 12mm correlates with a low normal EF and any measurement above 12mm correlates with a low EF.

Of note be careful using EPSS to approximate ejection fraction in patients with mitral valve disease, especially mitral stenosis, as this correlation goes out the door.

The image below shows a normal EPSS. Notice the short, white, vertical line just to the right of the white star. It’s very short, which means the EPSS is practically zero. It’s safe to say this patient probably has a normal ejection fraction.

 

 

 

 

 

 

 

This next image shows an increased EPSS of almost 19mm. This patient has a low ejection fraction.

 

 

 

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