OPPLER TISSUE IMAGING (DTI) AS A NEw TECHNIQUE FOR EVALUATION OF LEFT VENTRICULAR DIASTOLIC FUNCTION

Abstract

Doppler tissue imaging, a new echocardiographic application recently developed for clinical use, has made possible the acquisition of myocardial wall velocities on line during echocardio raphic examination. Myocardial velocities may be depicted as a color scale for 2-D or M-mode imaging called color coded DTI, or as a pulsed wave Doppler tissue (PWD-TI), recording by positioning the sample volume within the myocardial region of interest.

Direct determination of myocardial velocities may be a more sensitive index of myocardial performance.

Recently, Doppler tissue imaging has emerged as a new non invasive imaging modality that allows direct online measurement of myocardial velocities throughout the cardiac cycle. the aim of this work is to evaluate the pattern of left ventricular relaxation through assessing the velocity of mitral annulus motion during diastole by Doppler tissue imaging (DTI) as a new non invasive technique.