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Background and Purpose of dilated cardiomyopathy (dilated cardiomyopathy, DCM) the etiology and pathogenesis has not been elucidated, clinically still lack capable of DCM end-stage survival prediction classification method currently used standards: clinical symptoms, invasive and non-invasive assessment of cardiac function, which can not meet the clinical needs. Instantaneous wave intensity (wave intensity, WI) technology as a hemodynamic indicator, the heart and can effectively evaluate the relationship between the arterial system, the circulatory system which can be obtained at any point, to provide a number of useful clinical information. In this study, the instantaneous wave intensity technique in patients with DCM carotid artery were detected, aims to explore the technical assessment of left ventricular systolic function in patients with DCM and peripheral hemodynamics of the relationship between value. Materials and Methods an experimental group of 63 cases diagnosed as dilated cardiomyopathy patients, 42 males and 21 females, aged 21 to 76 years, mean 56.4 ± 13.3 years, according to the New York Heart Association (NYHA) heart function promulgated diagnosis and grading standards, will be divided into three groups, A group: NYHA Ⅱ 22 patients, mean 54 ± 11.5 years; B Group: NYHA Ⅲ 18 patients, mean 50 ± 15.7 years; C Group: Heart 23 patients with functional class Ⅳ, mean 61 ± 11.4 years old. The control group and the experimental group age and sex matched healthy volunteers by 55 patients, 31 males and 24 females, aged 19 to 65 years, mean age 43.2 ± 14.5 years old. 2 using ALOKA Prosoundα10 color Doppler ultrasonography to detect all of the indicators selected candidates WI: W1 peak, W2 peak, NA, R-W1 interval and W1-W2 interval, etc.; while applying conventional two-dimensional and M- echocardiographic measurement of left ventricular diastolic diameter (LVIDd) and volume, left ventricular systolic diameter (LVIDs) and volume calculation of left ventricular ejection fraction (LVEF). Results DCM group W1, W2 peak was significantly reduced compared with the normal control group (P lt; 0.01), R-W1 interval was significantly longer than the normal control group (P lt; 0.01), W1-W2 interval was significantly shorter than the normal control group (P lt; 0.01), R-W1/W1-W2 ratio significantly increased compared with normal control group (P lt; 0.01), the difference was statistically significant, NA values between the two groups was not statistically significant; DCM groups Rooms, compared with NYHA Ⅱ grade, NYHA Ⅲ Ⅳ grade level and reduce the patient's W1 (P lt; 0.05), Wl positively correlated with LVEF (P lt; 0.01). Conclusion WI can be used as a study of peripheral vascular hemodynamics and cardiac function relationship between new technologies used in clinical, as DCM patients with peripheral vascular hemodynamics between systolic function provides valuable information, and in a certain sense to judge the severity of, and for the patients with DCM evaluation of left ventricular systolic function provides a new approach.
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