RESUMEN
A tissue-tracking system can trace myocardial tissue using pattern matching method regardless of Doppler velocity information.The article shows data concerning clinical usefulness of the 2-dimensional tissue tracking(2DTT)technique in pediatric patients.2DTT is able to measure 3 directional(radial,circumferential,and longitudinal)strains of the myocardium in a pediatric population including neonates.Therefore,2DTT has clinical value for determination of normal pediatric cardiac myocardial strain.
RESUMEN
Firstly,this article analyzes the requirement of the standard voltage for the ECG & EEG verification instrument.Then it analyzes the feasibility of measurement using 34401A multimeter and provides the test method.This method is proved to be exact and reliable by experiment.