Correlation of Tei index obtained from tissue Doppler echocardiography with invasive measurements of left ventricular performance.
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) (beta=-0.384, P = 0.046) and positive correlation with tau (beta= 0.397, P = 0.040). ET had a negative correlation with heart rate (beta=-0.446, P = 0.005) and positive correlation with EF (beta= 0.379, P = 0.015). ICT + IRT had a positive correlation with tau (beta= 0.512, P = 0.002). ICT/ET had a negative correlation with EF (beta=-0.657, P < 0.001) and positive correlation with peak early transmitral filling wave velocity (beta= 0.385, P = 0.001). IRT/ET had a positive correlation with tau (beta= 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.
Su
Ho-Ming
HM
Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University, Chung-Ho Memorial Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.
Lin
Tsung-Hsien
TH
Voon
Wen-Chol
WC
Lee
Kun-Tai
KT
Chu
Chih-Sheng
CS
Yen
Hsueh-Wei
HW
Lai
Wen-Ter
WT
Sheu
Sheng-Hsiung
SH
D006328:Cardiac Catheterization; D003327:Coronary Disease / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D015150:Echocardiography, Doppler; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction / Q000502:physiology