5Lakoumentas JA, Panou FK, Kotseroglou VK, et al. The Tei index of myocardial performance: applications in cardiology. Hellenic J Car- dio1,2005,46( 1 ) :52-58.
6Tei C, Ling LH, Hodge DO, et al. New index of combined systolic and diastolic myocardial performance: a simple and reproducible measure of cardiac function-a study in normals and dilated cardio- myopathy. J Cardiol,1995,26(6) :357-366.