Purpose: To realize the detection of T-wave end with an efficient and accurate method. Methods: R-wave was lo-cated using wavelet transforming, and then the T-wave detection interval was identified accttrately by avoiding the influence of heart rate and P-wave. In addition, T-wave peaks were determined referring to the modulus maxima in the interval. Based on these, the T-wave end was located with a simple and practical geometrical method, which was applied for the evaluation of QT database. Results: The positioning capability of the above-mentioned method reached to (-0.35225±18.5869) ms which was comparable or even better than those manual annotations from QT database by cardiologists. Conclusions: The experimental results showed that our algorithm for T-wave end detection is robust to noise, baseline drift and waveform morphological varia-tions, and easy to calculate and to realize.

Objective To investigate the values of echocardiographic parameters for predicting the spontaneous closure of the ductus arteriosus in preterm infants .Methods A retrospective study of 110 preterm infants from October 2013 to October 2014 in our hospital was done .Examination was done at 1 ,3 ,7 d with echocardiography for those infants .Diameter of left atrium(LA) ,aotic root(AO) and arterial canal‐related parameters (the smallest width of ductal color Doppler flow jet and the maximum velocity at the ductus) at first .Preterm infants in this study were divided into two groups .The early patent ductus arterisus group included ones whoes ductus didn′t closed spontaneous in 7 d ,and the control group included ones whoes ductus closed spontaneous in 7 d ,and then the echocardiographic parameters between the two groups were compared .Results (1)The rates of ductus arteriosus sponta‐neous closure in preterm infants at 3 ,7 d were 70 .9% (78/110) ,78 .2% (86/110) ,respectivly .(2)When compared with the control group ,The rate of LA/AO in patent ductus arterisus group were higher than that of the control group(P<0 .01);The smallest width of ductal color Doppler flow jet in patent ductus arterisus group were bigger than that of the control group(P<0 .01);The maximum velocity at the ductus in patent ductus arterisus group were lower than that of the control group(P<0 .05) .(3)The best critical points of the LA/AO ,the smallest width of ductal color Doppler flow jet and the maximum velocity at the ductus of the spontaneous ductus arteriosus closure in preterm infants were 1 .32 mm ,2 .56 mm and 185 .5 cm/s ,respectivly .Conclusion Echo‐cardiography plays a significant role in prediction of the spontaneous closure of the ductus arteriosus in preterm infants .

Objective To understand the status quo of dyslipidemia among urban and rural residents in Ganzhou City.Methods The multistage stratified cluster random sampling method was adopted to select the urban and rural residents aged more than 35 years old as the respondents,among them 4 829 respondents had the intact data,the investigation items included age,sex,height,body mass,waist circumference(WC),FBG,Scr,blood pressure,TC,TG,HDL and LDL.The body mass index was calculated.Results The prevalence rates of hypercholesterolemia,high TG and low HDL among the urban and rural residents in Ganzhou City were 8.76 ％,16.38％ and 24.04％ respectively.Compared with the persons of normal blood lipid,FBG,Ser,WC and BMI in the persons of high blood lipid were much higher (P＜0.05).Conclsion The blood lipid abnormality in the urban and rural residents in Ganzhou City is dominated by low HDL and high TG.

Objective To investigate the application value of ultrasound elastography and contrast enhanced magnetic resonance imaging (CEMRI) in assessing the effect of neoadjuvant chemotherapy (NAC) for T1-2 N1-2 M0 breast cancer.Methods Twenty-three cases of breast cancer operation and receiving preoperative NAC in Chongqing Municipal Tumor Institute from January 2015 to December 2016 were collected.They all underwent ultrasound elastography and CEMRI before the first time NAC and operation respectively.Results Based on the postoperative pathological response grading,the sensitivity and specificity of CEMRI for evaluating the NAC effect were 94.1 ％ and 83.3％ respectively,which of ultrasound elastography were 88.2％ and 83.3％ respectively.The two kinds of examination method showed medium consistency(Kappa values were 0.77 and 0.68 respectively).Conclusion Ultrasound elastography extends the ultrasound diagnostic basis,can more comprehensively display the lesion character and more effectively reflect the NAC effect.

Objective:To investigate the prognostic significance of preoperative neutrophil-lymphocyte ratio(NLR)combined with tu-mor-associated neutrophils(TANs)in the stroma of gastric cancer tissues of patients.Methods:One hundred and twenty-six gastric cancer tissue samples from patients enrolled in Changhai hospital from June 2006 to May 2011 were divided into four groups accord-ing to NLRs in preoperative peripheral blood combined with high or low infiltration of neutrophils in gastric cancer tissues.The 5-year survival of the four groups was then compared,and their correlations with clinicopathologic features and prognosis were analyzed.Re-sults:High NLRs in peripheral blood combined with low infiltrating TANs in gastric tissues was associated with lower differential grade (P<0.001)and larger tumor size(P=0.026).Of the four groups,patients with high NLR in peripheral blood combined with low infiltrat-ing TANs in gastric cancer tissues demonstrated the lowest survival rates,whereas those with low NLR and high infiltrating TANs had highest survival rates, and this difference was statistically significant (P<0.05). Univariate and multivariate Cox regression analyses showed that high NLR in peripheral blood combined with low infiltrating TANs in gastric cancer tissues(P<0.05)was an independent factor indicating poor prognosis.Conclusions:NLR in preoperative peripheral blood combined with infiltrating TANs in gastric cancer tissues can be used as a prognostic indicator for patients with gastric cancer,especially high NLR in preoperative peripheral blood com-bined with low infiltrating TANs in gastric cancer tissue indicates poor prognosis.