Objective: To explore diagnostic value of dynamic electrocardiogram (DCG) on coronary artery disease. Methods: A total of 100 inpatients with “angina pectoris” history from our hospital were enrolled and received 24h DCG measurement. The DCG examination results were compared with those of coronary angiography (CAG) and analyzed then. Results: Among the 100 patients, there were 85 patients with positive DCG, including 70 cases with positive CAG and 15 cases with negative CAG; and 15 patients with normal (negative) DCG, including 10 cases with negative CAG and five cases with positive CAG. With CAG as golden standard, sensitivity, specificity, positive predictive value (accuracy) and negative predictive value of DCG in diagnosis of coronary heart disease were 93.3%, 40.0%, 82.4% and 66.7% respectively. Partial patients had “angina pectoris”, no stenosis in CAG but there’s slow blood flow. Conclusion: Dynamic electrocardiography is one of important measuring methods diagnosing coronary heart disease. It is simple, practical, safe, economic and appropriate for wide application in clinic, but its specificity is just 40.0%, so coronary heart disease cannot be excluded in negative patients.

Objective To evaluate the clinical effect of Wy 10 whitening combined with enamel microabrasion on bleaching dental fluorosis.Methods Forty patients with dental fluorosis were in-cluded and divided into two groups (20 each):group A was treated with Wy 10 whitening and enamel microabrasion,and group B only with Wy 10 whitening.Efficacy was measured according to the Vita classical shade guide before and after treatment.Sensitivity between groups was also tested.Results The effective rate of group A was significantly higher than that of group B (x2 =5.096,P＜0.05).The sensitive rates were 20.0％ (4/20) and 15.0％ (3/20) in group A and group B,respectively.No significant difference was found between the two groups in sensitivity (P＞0.05).Conclusions Wy 10 whitening combined with enamel microabrasion is an effective and safe method for bleaching dental fluorosis.

Objective: To study the effect of curcumin on cardiac remodeling and heart function change induced by adriamycin in rats. Methods: A total of 50 SD rats were randomly divided into blank control group (n=10), adriamycin group (n=20) and curcumin intervention group (n=20). General conditions of rats, including weight, hair color, diet and activity capacity, were observed. Left ventricular ejection fraction (LVEF), left ventricular fractional shortening (LVFS) and left ventricular end-diastolic dimension (LVEDd) were observed by echocardiography. Rat heart was weighed and levels of cardiac collagen type Ⅰ and Ⅲ were observed using immunohistochemistry method. Results: Compared with blank control group after experiment, there were significant increase in heart weight [(168.53±26)mg vs. (208.34±31)mg], heart weight/body weight [(0.36±0.06) vs. (0.52±0.08)], and significant decrease in body weight [(469.27±34)g vs. (428.47±45)g]; significant increase in LVEDd [(4.87±0.19)mm vs. (7.49±0.83)mm], significant decrease in LVEF [(69.53±6.25)% vs. (41.46±4.38)%] and LVFS [(45.83±3.79)% vs. (17.25±2.92)%] in adriamycin group, P<0.05 all, significant increase in expression rates of collagen type Ⅰ and Ⅲ, P<0.01.Compared with adriamycin group, there were significant increase in body weight (452.46±38)g, significant decrease in heart weight (178.73±38)mg, heart weight/body weight (0.39±0.07); significant decrease in LVEDd (5.96±0.65)mm and significant increase in LVEF (53.12±5.43)% and LVFS (36.57±3.66)%, P <0.05 all; significant decrease in expression rates of collagen type Ⅰ and Ⅲ in curcumin group, P <0.01. Conclusion: Curcumin can improve cardiac remodeling and heart function induced by adriamycin in rats.

The genetic indentification of 16S rDNA or ITS, capability of phosphate-solubilization and pH of medium, and optimization of medium of some microorganism isolated from mangrove were investigated in this study. The result showed that the fungi normally had much higher capacity to dissolve the inorganic phosphate than the bacteria, the capacity of the fungi was closely correlated to the pH of medium, but the relationship was weak for the bacteria. It was illustrated by single factor experiments that the optimal carbon and nitrogen sources were maltose and urea respectively. The orthogonal design was employed in testing the optimum composition of medium composed of 5 g/L maltose, 0.05 g/L urea, 5 g/L NaCl, pH 5. In this optimal medium, the effectively enrichment of bacteria could reach up to 6.06?109 CFU/mL under 30?C for 48 hours cultivation.

Objective:To evaluate right heart remodeling and right heart function change after pulmonary resection by echocardiography (ECG) .Methods:A total of 50 patients undergoing pneumonectomy received ECG examination to evaluate right ventricular structure and right heart function change before and after partial pulmonary resection .Re-sults:(1) Compared with before operation , there were no significant changes in right ventricular anterior free wall thickness ,right ventricular ejection fraction on 7d and 30d after operation;(2) Compared with before treatment , there were significant rise in pulmonary artery systolic pressure [PASP ,(20.52 ± 2.46) mmHg vs .(49.65 ± 2.17) mmHg] ,pulmonary artery diastolic pressure [PADP ,(10.82 ± 2.04) mmHg vs .(21.93 ± 1.26) mmHg] and pul-monary artery mean pressure [PAMP ,(13.78 ± 3.67) mmHg vs .(26.67 ± 3.28) mmHg] ,and significant rise in pulmonary vascular resistance [PVR ,(187.69 ± 12.46) dyn .s .cm-1 vs .(368.72 ± 11.94) dyn .s .cm-1 ] on 7d after pulmonary resection , P<0.05 all;all above indexes recovered to normal on 30d after treatment ;(3) Com-pared with before operation ,right ventricular Tei index significantly rose [ (0.36 ± 0.05) vs .(0.69 ± 0.13) , P=0.04] on 7d after operation ,the Tei index recovered to normal on 30d after treatment ,P=0.20. Conclusion:Com-pared with before operation , the PASP ,PADP and PAMP significantly rise on 7d after operation ,they recover to normal on 30d after treatment ;there are no significant change in right ventricular structure .

Objective:To study the improving effect of curcumin on cardiac function and its influence on myocardial collagen concentration in rats with myocardial infarction (MI).Methods:A total of 60 healthy adult male SD rats were randomly divided into sham operation group (n=10,survived rats n=9)and operation group [n=50,left an-terior descending artery was ligated,they were randomly divided into following four groups,on 28 d the treatment and survived rats in every group were:myocardial infarction (MI)group (n=9),control group (received intraper-itoneal injection of mixed solution,n= 10)and curcumin group (received intraperitoneal injection of curcumin, 100mg·kg-1 · d-1 n= 12)].After four weeks,M-mode echocardiography was used to measure left ventricular shortening fraction (LVFS),left ventricular ejection fraction (LVEF)and heart rate (HR).Masson staining was used to detect the myocardial fibrosis alteration after MI.Immunohistochemistry was used to measure expressions of myocardial collagen type Ⅰ and Ⅲ,and ratio of collagen Ⅰ/Ⅲ.Results:Compared with MI group and control group,after four weeks,there were significant rise in LVFS [(17.23±1.97)%,(19.34±0.83)% vs.(26.70± 1.15)%]and LVEF [(42.08±5.50)%,(41.63± 1.81)% vs.(56.76±2.49)%],significant reductions in HR [(433.16±20.05)beats/min,(433.04±24.17)beats/min vs.(403.96±7.08)beats/min],concentrations of myo-cardial collagen Ⅰ and Ⅲ,and ratio of collagen Ⅰ/Ⅲ [(13.5±0.9),(13.9±1.0)vs.(10.3±1.6)]in curcumin group,P <0.01 all.Masson staining indicated that acute myocardial infarction can cause significant left ventricular interstitial fibrosis.Conclusion:Curcumin could significantly improve cardiac function and inhibit myocardial fibro-sis level in rats with acute myocardial infarction.

Objective To discuss the expression of mitochondrial phosphate carrier (PiC) in myocardial injury caused by doxorubicin, and the protective mechanism of curcumin in myocardial injury caused by doxorubicin .Methods 60 adult SD rats were randomly divided into three groups:control group, doxorubicin group, curcumin+doxorubicin group.Control group was injected 0.9% sodium chloride injection (2.5 mL/kg) by rat tail vein injection, one times per week, 6 times in total.Doxorubicin group was injected with 0.5 mg/mL doxorubicin which diluted with 0.9% sodium chloride injection by rat tail vein injection, and the dosage was 1.25 mg/kg(about 0.5 mL).Curcumin+doxorubicin group was injected the same dose doxorubicin as doxorubicin group.After that, 12 mg/mL curcumin injection was added with 30mg/kg by rat tail vein injection.one times per week, 6 times in total.The glutathione peroxidase (Gpx) assay kit, superoxide dismutase (SOD) assay kit and malondialdehyde (MDA) detection kits were used to test the oxidative stress levels in myocardial cells of SD rats.Flow cytometry is used to test the SD rat cardiomyocytes transferred level. Application of Western blot and Real-time PCR technology were used to detect expression of PiC.ResuIts The Gpx activity and SOD vitality in myocardial cells of SD rats in curcumin with doxorubicin group all significantly increased compare with those of doxorubicin group, and all decreased compare with those of control group.But the rate of myocardial apoptosis, content of malondialdehyde and expression of Slc25a3 gene and PiC protein from myocardial cells of SD rats from curcumin with doxorubicin group all significantly increased compare with those of control group , and all decreased compare with those of doxorubicin group.ConcIusion Doxorubicin could increase the expression of PiC in myocardial mitochondria, the levels of oxidative stress, and the apoptosis of myocardial cells, and the effect of curcumin could be effective against the injury induced by doxorubicin .

Objective: To explore independent risk factors of coronary artery calcification (CAC) and analyze correlation among risk factors of CAC and serum osteopontin (OPN) level. Methods: According to results of 64-slice spiral computed tomography (MSCT) coronary angiography, a total of 65 patients were continuously enrolled and divided into CAC group (n=37) and non-CAC control group (n=28). Enzyme linked immunosorbent assay (ELISA) was used to measure serum level of OPN. Single factor and multiple factor Logistic regression analysis’s were used to analyze risk factors of CAC. Spearman’s straight line analysis was used to analyze correlation between risk factors of CAC and serum OPN. Results: 1、 The age, hypertension, diabetes, poor eating habits，lack of exercise, overweight, etc., which were independent risk factors of CAC （OR=3.47～12.96, P=0.018～0.003）by single factor Logistic regression analysis, were inducted to multiple factor Logistic regression analysis, its result showed that age, overweight, poor sleep quality, poor eating habits were independent risk factors of CAC, OR=35.31～5.17, P＜0.01～0.05; 2、Serum level of OPN in CAC group was significant higher than that of non-CAC control group ［(39.919±11.879) μg /L vs. (24.000±6.000) μg /L，P<0.01］; 3、The Spearman straight line correlation analysis indicated that serum level of OPN was correlated with risk factors of CAC : positively correlated with LDL-C, overweight, age, TC（r=0.487～0.286,P＜0.001～＜0.05）, and positively correlated with poor sleep quality, diabetes, poor eating habits, lack of exercise（r=4.10～2.24， P<0.01～0.05）; negatively correlated with HDL-C（r=-0.250,P＜0.05）. Conclusion: Correlation analysis indicates that age, overweight, poor sleep quality, poor eating habits etc. are independent risk factors of CAC；Serum OPN level is correlated with LDL-C, overweight，age, diabetes, lack of exercise etc., so these indicate that must decrease OPN level and risk factors of CAC to relieve CAC and slow down its development.