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Background coronary atherosclerotic heart disease (CHD) is the most common type of cardiovascular disease. In most Western countries, cardiovascular disease is the leading cause of death, which is mainly due to coronary heart disease; China in recent years, the incidence of coronary heart disease increased year by year, and the gradual to younger development trends, has become a serious harm to the health of the people common diseases. The correct evaluation of the patient's cardiac function in the diagnosis of coronary heart disease, the efficacy evaluation and prognosis of clinical significance. Myocardial performance index (referred to as Tei index) - 1995 Japanese scholars Tei was first proposed, a new integrated evaluation of cardiac contraction and relaxation of the overall functionality of the new indicators. It does not depend on the geometry of the ventricle, with a simple, accurate, repeatable, and for the evaluation of ventricular local and overall function. Anatomical M-mode purpose of this project is designed to ALOKA Company products supplied - AMM (Anatomic M-mode) and pulsed Doppler ultrasound, the prosecution side Tei index and its derived isovolumic contraction index (ICT / ET), and isovolumic relaxation index (IRT / ET) and other relevant parameters, together with a comprehensive analysis of the changes in left ventricular function in patients with coronary heart disease and in combination with other traditional indicators, so as to explore the clinical value of Tei index and its related parameters in the evaluation of left ventricular function in correlation analysis on the test results of the two methods designed for the clinical evaluation of cardiac function and a non-invasive, accurate diagnosis of new methods for ultrasound workers recommend an easy to operate, repeatable, efficient detection tools. Materials and Methods 75 subjects were divided into Ⅰ, Ⅱ, Ⅲ, Ⅳ group. Normal control group (I group), 30 cases; case group, 45 cases, according to the results of coronary angiography were divided into three groups: coronary artery with mild stenosis group (Ⅱ group), 18 cases; coronary artery severe stenosis group (III group) 15 cases; myocardial infarction group (IV group), 12 cases. Dual plane SimPson's law estimate each be inspected by left ventricular ejection fraction (LVEF) and PW method The the mitral flow diagram diastolic peak of early and late blood flow (E, A), their ratio (E / A), E peak deceleration time (EDT). Were used anatomical M-mode (AMM) and pulsed Doppler (PW) ultrasound measurement of isovolumetric contraction time (ICT), isovolumic relaxation time (IRT) and ejection time (ET), with input ultrasonic diagnostic apparatus automatically calculate the Tei index index and isovolumetric contraction (ICT / ET), isovolumic relaxation index (IRT / ET). . Blood pressure and heart rate among the groups there was no significant difference in the age of the patient group control group, the proportion of males was higher than those in the case group. Ⅰ, Ⅱ, Ⅲ group LVEF value difference was not statistically significant (P> 0.05), the IV group EF value was significantly lower than the first three groups (P lt; 0.05); Ⅱ, Ⅲ, group Ⅳ E / A were less than I group, EDT values ??are greater than in group I (P lt; 0.05), Ⅱ, Ⅲ group between the two groups showed no statistical significance (P gt; 0.05). 2 normal control group and the patient group the AMM and PW ultrasound measurements: Tei index increased, with the degree of coronary artery stenosis with gradual increase, there were significant differences among the groups; ICT / ET, IRT / ET Ⅰ group Ⅱ difference between the groups was not statistically significant, group Ⅲ was significantly higher than group Ⅰ, Ⅳ group was significantly higher than the first three groups; IRT, ICT with coronary stenosis rise gradually rise, with the Tei index; ET decreased gradually Ⅳ group was significantly less than group Ⅰ. 3.2 measurement method from the ICI, IRT, ET, ICT / ET, IRT / ET and Tei value of the difference was not statistically significant, and there is a very good correlation. Conclusion 1 with the severity of coronary artery stenosis, Tei index and isovolumetric contraction index (ICT / ET), etc. the isovolumic relaxation Index (IRT / ET) showed a certain growth trend with impaired cardiac function status is closely related. Application Tei index combined isovolumic contraction, diastolic index can be simple, effective and comprehensive evaluation of the overall function of the left ventricle. AMM application and PW are two ways of measuring the correlation of Tei index and its related parameters, anatomical M-mode ultrasound for the measurement and evaluation of Tei index and its associated parameters to provide a new detection tool.
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