Right Ventricle: Difference between revisions
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Unfortunately, it is often rather difficult to measure. The easiest method to assess the Tei index is a tissue doppler signal of the RV in a AP4CH view. The tissue Doppler method allows for measurement of the Tei index or MPI as well as S', E', and A', all from a single image. You divide the isovolumic time (assessed as the time between TV closure (end of A') and opening (start of E') minus the ejection time) by the ejection time: | Unfortunately, it is often rather difficult to measure. The easiest method to assess the Tei index is a tissue doppler signal of the RV in a AP4CH view. The tissue Doppler method allows for measurement of the Tei index or MPI as well as S', E', and A', all from a single image. You divide the isovolumic time (assessed as the time between TV closure (end of A') and opening (start of E') minus the ejection time) by the ejection time: | ||
TEI index (RV MPI) = | TEI index (RV MPI) = IVCT + IVRT / RVET = TCOT - RVET / RVET | ||
The normal values of left and right ventricle differ. Due to the high pressures which must be generated by the LV, the isovolumic times of the LV are relatively long. The RV generates less pressure and therefore the index also lower with average at around 0.28. A Tei index above 0.55 (TDI) is considered abnormal. | The normal values of left and right ventricle differ. Due to the high pressures which must be generated by the LV, the isovolumic times of the LV are relatively long. The RV generates less pressure and therefore the index also lower with an average at around 0.28. A Tei index above 0.55 (TDI) is considered abnormal. | ||
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Click [http://csecho.ca/cardiomath/?eqnHD=echo&eqnDisp=mpiteirv '''here'''] for MPI calculation. | Click [http://csecho.ca/cardiomath/?eqnHD=echo&eqnDisp=mpiteirv '''here'''] for MPI calculation. | ||
The determination of the RV function, occurs regularly on the eye, or even not at all. Unfortunately, this ensures that many RV pathology is not recognized. Using various echo techniques may result a good statement about the function of the RV. Never restrict to one technique, but always more views to assess its function. This reduces the risk of troublesome and even erroneous interpretations.<cite>2</cite> | The determination of the RV function, occurs regularly on the eye, or even not at all. Unfortunately, this ensures that many RV pathology is not recognized. Using various echo techniques may result in a good statement about the function of the RV. Never restrict to one technique, but always more views to assess its function. This reduces the risk of troublesome and even erroneous interpretations.<cite>2</cite> | ||
==References== | ==References== | ||
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#2 pmid=15842967 | #2 pmid=15842967 | ||
</biblio> | </biblio> | ||
==External links== | |||
* [https://www.techmed.sk/en/echo/new-examination/ Online Free Echocardiography Learning Platform (TECHmED)] | |||