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Correlation of Tei Index Obtained from Tissue Doppler Echocardiography with Invasive Measurements of Left Ventricular Performance
Author(s) -
Su HoMing,
Lin TsungHsien,
Voon WenChol,
Lee KunTai,
Chu ChihSheng,
Yen HsuehWei,
Lai WenTer,
Sheu ShengHsiung
Publication year - 2007
Publication title -
echocardiography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 62
eISSN - 1540-8175
pISSN - 0742-2822
DOI - 10.1111/j.1540-8175.2007.00382.x
Subject(s) - isovolumetric contraction , cardiology , medicine , isovolumic relaxation time , ventricle , diastole , ventricular function , correlation , ejection fraction , doppler echocardiography , cardiac catheterization , tissue doppler echocardiography , diastolic function , heart failure , mathematics , blood pressure , geometry
Background: The aim of this study is to correlate Tei index obtained from tissue Doppler echocardiography (TDE‐Tei index) defined as the ratio of the sum of isovolumetric contraction time (ICT) and isovolumetric relaxation time (IRT) over the ejection time (ET) with invasive measurements of left ventricular (LV) performance. Methods: Thirty‐four patients who underwent an echocardiographic examination and cardiac catheterization were studied. Invasive measurements of peak +dp/dt, peak −dp/dt, and isovolumic relaxation constant of the left ventricle (tau) were obtained from a micromanometer‐tipped catheter. Results: After a multivariate analysis, TDE‐Tei index had a negative correlation with ejection fraction (EF) (β=−0.384, P = 0.046) and positive correlation with tau (β= 0.397, P = 0.040). ET had a negative correlation with heart rate (β=−0.446, P = 0.005) and positive correlation with EF (β= 0.379, P = 0.015). ICT + IRT had a positive correlation with tau (β= 0.512, P = 0.002). ICT/ET had a negative correlation with EF (β=−0.657, P < 0.001) and positive correlation with peak early transmitral filling wave velocity (β= 0.385, P = 0.001). IRT/ET had a positive correlation with tau (β= 0.402, P = 0.018). Conclusions: TDE‐Tei index exerts a correlation both with accepted indices of LV systolic and diastolic function acquired by cardiac catheterization. Hence, TDE‐Tei index is a simple and feasible indicator in assessing overall LV function.