[Can stress echocardiography by quantified?].
Stress echocardiography has been validated for the evaluation of myocardial ischaemia and viability despite a semi-quantitative interpretation based on visual analysis of segmental myocardial thickening. The technique remains, therefore, partially subjective, which probably affects its diagnostic value and reproducibility, especially during the learning period of a non-expert operator. A first step towards better reproducibility was made possible by Second Harmonic imaging and standardised interpretation according to the recommendations of the American Society of Echocardiography. The quantification is based on the analysis of numerical data obtained by Doppler tissue imaging or color kinesis. Doppler Tissular Imaging in the pulsed mode with analysis of transparietal velocity gradients or regional deformation is currently under evaluation. However, the use of threshold values for myocardial velocities has been of little diagnostic value and the use of algorithms adjusted for age, heart rate and gender are necessary. Another approach is that of colour coding of endocardial displacement (Color Kinesis) with automatic contour detection. This relatively easy technique requires a shorter post-processing and the initial results are encouraging.
Monin
J L
JL
Fédération de cardiologie CHU Henri-Mondor, AP-HP, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94010 Créteil. jeanluc.monin@free.fr
Guéret
P
P
D018618:Echocardiography, Doppler, Color; D025401:Echocardiography, Stress / Q000379:methods / Q000706:statistics & numerical data*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D017202:Myocardial Ischemia / Q000000981:diagnostic imaging*; D015203:Reproducibility of Results