Association between atmospheric particulate matters and outpatient visits for respiratory disorders in Jiaxing City of Zhejiang Province from 2019 to 2021： a time series analysis / 上海预防医学

ObjectiveTo explore the effect of exposure to atmospheric particulate matters on the outpatient visits of respiratory disorders in Jiaxing City，Zhejiang Province. MethodsDaily air pollutant monitoring data，meteorological data and outpatient visits of respiratory disorders in Jiaxing City from 2019 to 2021 were collected．A generalized additive model was applied to evaluate the effect and laggeel effect of the concentrations of atmospheric particulates for outpatient visits of respiratory disorders after adjusting for secular trend， day-of-the-week effect， holiday effect， and meteorological variables. ResultsThe daily average concentrations of PM2.5， PM10， O3 and NO2 exceeded the standard， and the proportion of days exceeding the standard was 3.4%， 1.3%， 11.0% and 0.8%， respectively. Every 10 μg·m-3 increase in PM2.5 concentration showed the strongest effects on the daily outpatient visits of respiratory disorders， adult and childhood respiratory disorders all on lag07 with ER（95%CI） being 2.29%（1.35%‒3.24%）， 2.31% （1.39%‒3.23%） and 2.65 % （1.36%‒3.96%）， respectively. The maximum ER of outpatient visits for respiratory disorders in children was higher than that in adults. Every 10 μg·m-3 increase in PM10 concentration showed the strongest effects on the daily outpatient visits of respiratory disorders on lag07， adult respiratory disorders on lag06 and childhood respiratory disorders on lag07 with ER（95%CI） being 1.42% （0.87%‒1.96%）， 1.49%（0.99%‒1.99%） and 1.61% （0.87%‒2.36%）， respectively. The results of double-pollutant model showed that the effect of atmospheric particulate reduced after O3 was introduced into the model. ConclusionThere are a short-term effect and a laggeel effect of atmospheric particulate on the outpatient visits of respiratory disorders. It is necessary to strengthen the health protection of the respiratory system of the population， especially the children.

A cross-sectional study on prevalence of scoliosis among primary and middle school students in Jiaxing City / 预防医学

Objective@#To investigate the prevalence of scoliosis among primary and middle school students in Jiaxing City, Zhejiang Province, so as to provide insights into scoliosis control among children and adolescents. @*Methods@#Grade 4 to 6 primary school students and grade 1 to 3 junior high school students were recruited using a stratified cluster sampling method in Jiaxing City in 2019. Participants' demographic characteristics, dietary habits and nutritional status, physical activity, learning environments, reading and writing habits were collected using questionnaires. Scoliosis was screened through general examinations, forward bend test and scoliometer, and scoliosis was diagnosed with whole-spine X-ray scans in an erect position. The prevalence of scoliosis was descriptively analyzed among primary and middle school students.@*Results@#A total of 8 026 primary and middle school students were included, 7 304 valid questionnaires were recovered, with an effective recovery rate of 91.00%. The respondents included 3 667 primary school students (50.21%) and 3 637 junior high school students (49.79%), and included 3 776 boys (51.70%) and 3 528 girls (48.30%). There were 659 participants with initial screening positive for scoliosis (9.02%), and the percentages of positive initial screening of thoracic, thoracolumbar and lumbar scoliosis were 2.93%, 4.56% and 4.56%, respectively. A higher percentage of positive initial screening of scoliosis was diagnosed among participants living in Pinghu City (10.45%), junior high school students (11.74%), girls (11.96%), students with a medical history of anemia (22.44%), students with less than 3 days of moderate-intensity physical activity in the past week (9.46%), students with less than 3 days of walking duration of over 10 minutes in the past week (10.18%), students with daily sitting duration of 5 hours and more in the past week (10.74%), students with their class seats exchanged every semester or month (10.28%), students with daily reading and writing duration of 3 hours and more after school (10.93%) and students with less than 10 cm distance from the chest at reading or writing to the edge of the table (9.67%) (all P<0.05). A total of 218 students received whole-spine X-ray scans in an erect position, 132 participants were definitively diagnosed as scoliosis (60.55%), and the estimated prevalence of scoliosis was 5.46%.@*Conclusion@#The percentage of positive initial screening of scoliosis was 9.02% among primary and middle school students in Jiaxing City. Gender, stage of learning, nutritional status, exercise frequency and habits of reading and writing may be factors affecting the development of scoliosis.

Surveys of nutrition risk and risk factors in patients with chronic pancreatitis / 肠外与肠内营养

Objective:To evaluate the nutritional risk and its risk factors in patients with chronic pancreatitis (CP).Methods:Using nutritional risk screening 2012,a retrospective study was performed to analyze nutritional risk in 156 CP patients.Conditional logistic regression model was applied to identify the risk factors from fourteen clinical features that potentially influen cenutritional risk.Results:Proportion of patients with nutritional risk was significantly higher than malnutrition patients (44.9％ vs 25.6％,x2 =12.64,P =0.000 4).Univariate analysis indicated the following seven factors,gender,concomitant diabetes mellitus,intervention by endoscope or surgery,pancreatic enzyme replacement therapy,anxiety depression,insufficient eating and nutritional support for less than 3 months were associated with higher nutritional risk in CP patients (P ＜ 0.01).The result of multivariate analysis showed that anxiety depression,insufficient eating and nutritional support for less than 3 months werethe risk factors for malnutrition CP patients.Conclusion:There are higher nutritional risks in CP patients and early psychotherapy,sufficient eating and timely parenteral or enteral nutrition support should be undertaken for patients with chronic pancreatitis.

The effect of 137Cs γ-rays on the differentiation of human peripheral blood mononuclear cells to osteoclast-like cells / 中华放射医学与防护杂志

Objective To study the effect of γ-rays irradiation on the differentiation potential of the human peripheral blood monocytes (PBMCs) into osteoclast-like cells (OCLs) in vitro.Methods PBMCs were isolated by density gradient centrifugation,treated by receptor activator of nuclear factor-κ B ligand (RANKL) and macrophage-colony stimulating factor (M-CSF) and exposed to 137Cs γ-rays with different radiation doses (0,0.75,2 Gy).After seven days of incubation,the cells were stained for tartrate resistant acid phosphatase (TRAP) and bone slices were stained by toluidine blue on the tenth day.Meanwhile,the characteristic osteoclast markers including Cathepsin K and integrin β3 were analyzed by real-time PCR.Tartrate resistant acid phosphatase 5b (TRAcP-5b) in the culture supernatant wasdetermined by ELISA.Results PBMCs were differentiated into OCLs by the treatments of RANKL and MCSF.The number of TRAP positive multinucleated OCLs was significantly higher in the dose of 0.75 Gy group than in control (0 Gy) group (t =3.451,P ＜ 0.05).Compared with the control group,the expression levels of Cathepsin K and integrin β3 and the concentration of TRAcP-5b were significantly elevated (t =2.343,2.728,3.631,P ＜ 0.05).However,in the 2 Gy group,there was a decrease in the number of osteoclasts,mRNA expression level of osteoclast characteristic markers and TRAcP-Sb,but no statistically significant differences compared with the control group.Conclusions Ionizing radiation may influence the osteoclastogenesis during the PBMCs differentiation to OCLs.At low dosage,ionizing radiation promotes osteoclastogenesis and enhances the resorptive activity of osteoclasts,but a decline of differentiation potential was observed at high dosage of radiation.

Predictive value of red cell distribution width on poor myocardial perfusion in patients with acute myo-cardial infarction treated by PCI / 心血管康复医学杂志

Objective:To study the predictive value of red cell distribution width (RDW)on poor myocardial perfu- sion in patients with acute myocardial infarction(AMI)treated by percutaneous coronary intervention (PCI).Meth-ods:From August 2013 to August 2015,a total of 212 ACS patients undergoing PCI in our hospital were selected. According to RDW of blood analyzer,patients were divided into RDW50% were regar- ded as good myocardial perfusion group (n=134).Clinical data were compared between two groups,and single fac- tor and multi-factor analysis were used to analyze influencing factors for myocardial perfusion.Results:Compared with RDW<13.0% group,there were significant rise in age [(62.85±5.23)years vs.(67.33±6.17)years],and significant reductions in left ventricular ejection fraction [LVEF,(52.37±6.14)% vs.(50.55±5.53)%]and STR [(0.73±0.26)vs.(0.57±0.39)]in RDW≥13.0% group,P<0.05 or <0.01. Compared with good myocardial perfusion group,there were significant reductions in percentage of RDW<13% (59.70% vs.44.87%)and LVEF [(52.25±3.81)% vs.(50.29 ± 4.08)%],and significant rise in age [(63.29 ± 1.93)years vs.(66.42 ± 2.15) years]in poor myocardial perfusion group,P<0.05 all.Multi-factor Logistic regression analysis indicated that age, LVEF and RDW were independent predictors for poor myocardial perfusion (r=3.826~6.525,P<0.01 all).Con-clusion:Red cell distribution width possesses good predictive value for poor myocardial perfusion in patients with a- cute myocardial infarction undergoing percutaneous coronary intervention,which is worth extending in clinic.

Time-and dose-effect of mitochondrial DNA deletions in γ-ray irradiated human peripheral blood / 中华放射医学与防护杂志

Objective To study the time-and dose-effect of mitochondrial DNA (mtDNA) 4934 bp and 4977 bp deletions in the human peripheral blood irradiated by137 Cs γ-rays,and to evaluate its implication in biological dosimetry.Methods The peripheral blood from five healthy adults was collected and irradiated with γ-rays.The peripheral blood of one healthy adult was irradiated with 5 Gy and cultured for 2,24,48 and 72 h after irradiation.The peripheral blood from the other four healthy adults was cultured for 2 h after 0,0.5,1,2,5 and 10 Gy irradiation.The peripheral blood mtDNA 4934 bp and 4977 bp deletions were detected by real-time polymerase chain reaction and gel electrophoresis.The doseeffect curves were fitted using Curve Expert 1.4 Software.Results mtDNA 4934 bp and 4977 bp deletions were induced at 2 h post-irradiation and the mtDNA 4934 bp deletion had relative high levels at 2 h and 48h after radiation (t =10.782 and 8.966,P ＜ 0.05),and mtDNA 4977 bp deletion reached the highest level at 48 h after radiation (t =7.433,P ＜0.05).mtDNA 4934 bp (t =2.895-8.105,P ＜0.05) and 4977 bp deletion (t =3.006-7.715,P ＜0.05) irradiated at 0.5-10 Gy increased with a dosedependent manner.The incidence of mtDNA 4977 bp deletion was higher than that of 4934 bp deletion for those samples exposed with same dose of irradiation,especially at 10 Gy (t =2.919,P ＜ 0.05),which suggested that 4977 bp deletion might be more sensitive than 4934 bp deletion at high dose.But larger individual differences were found in 4977 bp deletion compared with 4934 bp deletion.The dose-effect equations for 4934 bp deletion and 4977 bp deletion were Y1 =1.178 + 0.1219D (R2 =0.9269) and Y2 =1.2578 +0.1933D (R2 =0.9016),respectively.Conclusions The induction of mtDNA deletion was correlated with radiation dose,and thus it may be a available method for biological dose estimation and prognostic evaluation.

Effects of 137 Cs γ-rays on proliferation, differentiation and mineralization of osteoblastic cells in vitro / 中华放射医学与防护杂志

Objective To evaluate the effect of gamma irradiation on the proliferation,differentiation,and mineralization of murine osteoblastic cells,and to investigate the related molecular mechanism.Methods Osteoblastic cells were irradiated by different doses (0,0.5,1.0,2.0,5.0 Gy)of 137Cs γ-rays.Cell morphology was observed with a microscopy,cell viability was analyzed by MTT assay,and ALP activity was analyzed by the methods of enzyme histochemistry and PNPP.Meanwhile,gene expressions of ALP,osteocalcin (OC),collagen Ⅰ,osteoprotegerin (OPG) and receptor activator of nuclear factor-kB ligand (RANKL) were measured by semi-quantified RT-PCR.Results Cell viability decreased with the radiation doses over 1.0 Gy ( t =6.197 - 18.677,P ＜ 0.05 ).After radiation with a dose over 2.0 Gy,the cell number and the junctions of cell protrusions decreased,the cells had low refractivity and the activity and mineralization ability of ALP were also inhibited ( t =2.790 -2l.374,P ＜0.05).In addition,the expressions of ALP and OC mRNA were down-regulated significantly (t =3.563 -16.508,P ＜ 0.05) when the radiation dose was higher than 0.5 Gy,and the expressions of OPG,OPG/RANKL mRNA were down-regulated ( t =12.942,4.954,P ＜ 0.05 ) at 5 Gy.But the expressions of collagen Ⅰ and RANKL mRNA were not affected by irradiation.Conclusions The osteoblastic cells were significantly influenced by γ-irradiation,including morphological changes,inhibition of cell proliferation,differentiation and mineralization ability. Meanwhile,mRNA expressions of ALP and OC were downregulated.OPG/RANKL may be a main pathway of osteoblastic cell damage under high dose radiation.

Glycophorin A mutation and relevant factors in medical radiation workers / 中华放射医学与防护杂志

Objective To explore the feasibility of using glycophorin A somatic mutation in peripheral erythrocytes,in order to evaluate the cancer risk of occupational medical exposure to ionizing radiation.Methods Totally 336 medical radiation workers were recruited as three groups (general radiation group,computer tomography group,intervention and radiation treatment group) and 112 healthy adults were selected as control by using stratified random cluster sampling method,where 176 medicalradiation workers and 58 health controls had a MN-heterozygous type.The erythrocytes were fixed and bound with fluorescent-labeled monoclonal antibody,and the glycophorin A somatic mutation frequency was assayed by a modified BR6-1W1 method using a FACScan flow cytometer.The individual susceptibility to radiation was investigated using micronuclei test and 3-Aminobenzamide index test.Results The GPA somatic mutation frequency of medical-radiation workers was significantly higher than that of healthy control ( t =2.29 - 11.48,P ＜ 0.05 ).In particular,the NO GPA aberration frequency of interventional radiology workers was much higher than that of the general medical diagnostic workers (t =2.01,P ＜ 0.05).In addition,the NO GPA variant frequency changed significantly with the years of radiation service,cumulative doses,and 3AB index.However,the NN GPA variant frequency was only associated with the years of radiation service,and no significant correlations were found between NN GPA variant frequency and cumulative dose of radiation exposure or 3AB index. Conclusions GPA mutation frequency,especially NO GPA mutation frequency could be used as a sensitive biomarker to predict the DNA damage and individual susceptibility for the population exposed to professional low-dose ionizing radiation.

Evaluation on the effect of Qinshan nuclear power station in normal operational condition on the environmental radioactivity in Shanghai city / 中华放射医学与防护杂志

Objective To study the effect on the environmental radioactivity level and the health of the residents in Shanghai when Qinshan Nuclear Power Station(QNPS) has been in normal operational condition for 17 years. Methods The field monitoring and the sampling analytical method were used for monitoring the radioactivity level in outdoor environment, drinking water, food and soil. Results The outdoor natural radiation level and the radioactivity level in the sample of the environmental media were on the normal background level. There was no distinct change in the environmental radiation level of Jinshan Area when QNPS was in normal operational condition. The radioactivity level in the environmental media was far lower than the limit values specified by the national standard GB. The effective dose of the outdoor natural external exposure for the residents is about 0.102 mSv/a and the effective dose of the internal exposure from the artificial radionuclides 90Sr and 137Cs in food for the residents is about 0.488 μSv/a. Conclusions There is no effect of the radioactive contamination on the environmental radioactivity level and the health of the residents in Shanghai when QNPS has been in normal operational condition for 17 years.

Sex differences in therapeutic outcomes in patients undergoing coronary stenting / 中国组织工程研究

BACKGROUND:Previous studies have shown that there are some significantly gender-related differences in coronary heart disease between women and men.It is not clear whether the outcomes have affected by gender.OBJECTIVE:To analyze the outcomes of follow-up after coronary stenting,and to investigate the sex diffefence.DESIGN,TIME AND SETTING:The prospective follow-up was performed at the Wuhan Asia Heart Hospital from January 2004 to December 2005.PARTICIPANTS:267 patients who suffered from coronary artery disease and treated with percutaneous coronary intervention were involved in the present study and followed up for 3 years,including 52 females and 215 males,averagely(59.4±7.5)years old.Imfarction in 3 levels were considered to be scccessful.Follow-up in out-patient clinic was conducted regularly.Six monks after implantation,telephone follow-up was done;questionnaire follow-up was performed every year.Average follow-up time was(20±7)months.MAIN OUTCOME MEASURES:Baseline clinical and angiographic characteristics,follow-up outcomes after 3 years of implantation after coronary stenting were compared between 52 females and 215 males.lower significantly than those in men.During the 3-year follow-up,no significant differences were observed between women and men regarding death,major adverse cardiovascular events,and recurrent typical ischemia.The proportion of symptom remission,life quality improvement was similar between women and men.In multivariable analysis,sex was not anindependent predicator for long-term outcomes of coronary stenting(OR 0.819,95% CI 0.41 to 1.79).CONCLUSION:Women with coronary artery disease are older than men and have more comorbidities.Long-term outcomes have improved in women after coronary stenting.Therapeutic outcome is not correlated to sex.

Effects of dehydroepiandrosterone on in vitro cultured osteoblasts and osteoprotegerin in rats / 中国组织工程研究

BACKGROUND: Dehydroepiandrosterone (DHEA) derived from adrenal cortex has an indirect bioeffect through differentiating into androgen or estrogen in the related peripheral tissues. OBJECTIVE: To verify the effects and mechanisms of DHEA on promoting osteoblasts (OBs) proliferation. DESIGN, TIME AND SETTING: The grouping controlled experiment was accomplished in Shanghai Sixth People's Hospital affiliated to Shanghai Jiao Tong University and Institute of Radiation Medicine, Fudan University from January 2006 to February 2007. MATERIALS: Ten SD rats were recruited, 1 day old, regardless of gender. DHEA was the product of American Sigma Company. METHODS: Rat OBs were separated and cultured in vitro. First generation of OBs cultured in a varied concentrations of DHEA (1?10-5, 1?10-7 and 1?10-9 mmol/L) for 72 hours were set up as the experiment group, while those exposed to 1?10-8 mmol/L of estradiol culture were regarded as positive controls and blank control group was set up as well. MAIN OUTCOME MEASURES: The OBs were identified by cell morphology and alkaline phosphatase (ALP) dyeing. Light microscope and methyl thiazolyl tetrazolium assay were used to detect the growth and proliferation of OBs. The formation of mineralized nodus was examined by alizarin bordeaux stain. The concentrations of osteoprotegerin in DHEA culture solution were also measured by double antibody sandwich ABC-ELISA simultaneously. RESULTS: ①Identification of primarily cultured OBs showed ALP dyeing was positive.②Proliferation rate of OBs was increased in experiment groups compared with that of the blank control group, and the most significant increase occurred in the concentration of 1?10-7 mmol/L DHEA culture (P 0.05).③ALP activity in experiment groups was higher, especially in the group with the concentration of 1?10-7 mmol/L DHEA (P 0.05).④ALP activity of unitary cell population was higher in 1?10-9 mmol/L DHEA culture group than that in blank control group (P

Advance in percutaneuous coronary intervention: the change of indications and contraindications / 基础医学与临床

Percutaneous coronary intervention(PCI) has created an epoch-making treatment approach to coronary artery disease(CAD).Over the last four decades,following constant progress of the new PCI technology and instruments,following the wide application of coronary stents,especially with drug-eluting stents(DES),PCI indications significantly broaden to cover more complex lesions and more high-risk patients.Some of the contraindications have shifted to indications of percutaneuous coronary intervention and some of former absolute contraindications are turned to relative contraindications.The change in indications and contraindications of PCI to coronary artery disease reveals the rapid development of percutaneuous coronary intervention.

The application of renal artery stenting for patients with coronary atery heart disease and renal artery stenosis needing coronary atery bypass graft / 中国介入心脏病学杂志

Objective To study the treatment of renal artery stenting for patients with coronary artery heart disease and renal artery stenosis who need coronary atery bypass graft (CABG) and its effect on preventing acute renal dysfunction after CABG. Methods From April 2001 to January 2005, renal artery stenting was carried out in 82 patients (a total of 104 renal arteries) with CHD and renal artery stenosis who needed CABG. Among the 82 patients, 77 of them accompanied with hypertension and 21 of them had abnormal renal function. Heparin was selected as anticoagulant other than anti-platelet drug and low molecular weight heparin before stenting. Results All of the stents were successfully implanted in 104 renal lesions without complication. Blood creatinine (Cr) reduced in 9 patients with renal dysfunction by the time of discharge. Three patients had blood Cr increased provisionally after stenting. Four patients with normal pre-operational renal function showed transient increase in blood Cr after stenting. All of the patients with transient blood Cr elevation had bilateral renal artery stenosis. Conclusion Renal artery stenosis may cause acute renal failure after CABG. Pre-CABG renal artery stenting may prevent the occurance of acute renal failure after operation.

Prevalence and relevant factors on echocardiographic left ventricular hypertrophy among community-based hypertensive patients in Shanghai / 中华流行病学杂志

<p><b>OBJECTIVE</b>To investigate the prevalence and relevant factors on the echocardiographic left ventricular hypertrophy (LVH).</p><p><b>METHOD</b>A cross-sectional study was conducted among the hypertensive patients in an urban community.</p><p><b>RESULTS</b>The prevalence of LVH was 29.2% in 1 686 hypertensive patients, with 25.4% in males and 34.5% in females, respectively. The prevalence was significantly higher in females than in males (chi(2) = 16.17, P < 0.01). The rate was increasing with age and significantly higher prevalence was observed in 45-, 55-, 65- age groups of females (P < 0.05). Moreover, elevated systolic blood pressure and higher BMI were related to the LVH in hypertensive patients, while higher education level seemed a protective factor.</p><p><b>CONCLUSION</b>These results implied that a comprehensive intervention should be taken in the prevention of LVH.</p>

Insulin sensitivity and the diffuseness of coronary artery disease in humans / 中华医学杂志(英文版)

<p><b>OBJECTIVE</b>To study the relationship between insulin sensitivity and diffuse coronary artery disease.</p><p><b>METHODS</b>Ninety-two consecutive patients underwent coronary angiography were enrolled in the study. Relationships between the results of angiograms and both glucose tolerance and blood lipids were analyzed.</p><p><b>RESULTS</b>The mean age of the 92 patients (70 males, 22 females) was 65.4 +/- 6.3 y. In the 78 patients diagnosed by angiography as coronary artery disease, diffuse lesion was more common in diabetic patients than in those without a diabetes history (12/13 vs 24/65, P = 0.00026). Fasting glucose [(6.06 +/- 2.43) x 10(-3) mol/L vs (4.80 +/- 1.47) x 10(-3) mol/L, P = 0.009], glucose levels at one hour [(12.37 +/- 4.38) x 10(-3) mol/L vs (9.10 +/- 3.97) x 10(-3) mol/L, P = 0.001], two hours [(11.12 +/- 5.64) x 10(-3) mol/L vs (7.49 +/- 4.29) x 10(-3) mol/L, P = 0.003] and three hours [(8.11 +/- 5.51) x 10(-3) mol/L vs (5.56 +/- 3.46) x 10(-3) mol/L, P = 0.020] after food were higher in patients with diffuse coronary disease than in those with non-diffuse coronary disease. Differences in the insulin sensitivity index (ISI) between the two groups was statistically significant (-4.36 +/- 0.52 vs -3.89 +/- 0.69, P = 0.003). The incidence of multiple-vessel disease in diabetic patients was higher than that in non-diabetic patients (12/13 vs 33/65, P = 0.00565). Glucose levels at two hours [(10.22 +/- 5.57) x 10(-3) mol/L vs (7.67 +/- 4.43) x 10(-3) mol/L, P = 0.034] and three hours [(7.90 +/- 5.47) x 10(-3) mol/L vs (5.22 +/- 2.79) x 10(-3) mol/L, P = 0.007] after food were higher in patients with multiple-vessel disease than in those with single-vessel disease. Impaired insulin sensitivity without a history of diabetes mellitus was commonly seen in patients with coronary artery disease.</p><p><b>CONCLUSIONS</b>The diffuseness of coronary artery disease is associated with insulin sensitivity and blood glucose levels. Insulin resistance is a common phenomenon in non-diabetic patients.</p>

Location of Coronary Chronic Total Occlusion and Its Correlation with Coronary Collateral / 中国医师杂志

Objective To study the location of coronary chronic total occlusion and the correlatin between coronary chronic total occlusion and coronary collateral. Methods SPSS was used to analyze the general clinical and coronary angiographic data of 113 patients with coronary bypass surgery performed. Results There were 61 patients with coronary chronic total occlusion. 71 sites of coronary chronic total occlusions were observed by coronary angiography, of which, one was located in left main coronary artery (0 9%), 17 in proximal left anterior descending artery (15 0%) , 9 in middle left anterior descending artery (8 0%), 3 in distal left anterior descending artery (2 7%), 5 in proximal left circumflex artery (4 4%), 6 in middle left circumflex artery (5 3%), 3 in distal left circumflex artery (2 7%), 9 in proximal right coronary artery (8 0% ), 10 in middle right coronary artery (8 8% ) and 8 in distal right coronary artery (7 1% ). There were 72 patients with coronary collateral. The coefficient of correlation between collateral and coronary chronic total occlusion was 0 707 (P=0 000 ).Conclusions Coronary chronic total occlusion is frequently located in proximal, middle left anterior descending artery and right coronary artery. There is significantly positive correlation between collateral and coronary chronic total occlusion.

Effect of Tripterygtam wilfordii Glycosides and poly saccharide sulphate on the intimal proliferation of injured rat aorta / 中国介入心脏病学杂志

31 rat were divided randomly into control group (n=10),tripterygium wilfordii glycosides group (n = 10 9. 4 mg/kg per day),and poly saccharide sulphate group (n=11. 30 mg/per day). We made balloon endothelium denudation in thoracic aortae of the rats. The treatments with drugs began 6 days before balloon injury and continously until the animal were killed 14 day after balloon injury. The determinations for area of neointima, neointima /media, coverage of neointima and 3H-TdR incoperation of thoracic aortae suggested that tripterygium wilfordii glycosides can inhibit intimal proliferation of injuried aorta, whill poly saccharide sulphate shows no effect.

Clinical and angiographic follow-up after percutaneous transluminal coronary angioplasty / 中国介入心脏病学杂志

There were no data concerning restenosis rate after percutaneous transluminal coronary angio-plasty available in China so far. Our study was focused on clinical and angiographic follow-up and tried to reveal the predictive value for angiographic restenosis using noninvasive tests among 592 patients whose 841 coronary arteries were dilated in our department from Dec. 1987 to Dec. 1994.This patient group consisted of 503 males and 89 females had average age of 58. 4 ? 9. 1. The overall success rate was 93. 3% and acute vessel complications was 4. 1%. After successful procedures of PTCA,the patients were followed up with recurrence of angina, Holler ECG, submaximal excercise ECG and 99mTc-MIBI exercise scintigraphy regularly. 62 of these patients underwent coronary angiographic follow-up from 4-24 months (average time: 10. 4 ? 7. 6 months) after PTCA. We found 35 patients with angiographic restenosis and 27 patients without. Thus, we divided the patients into restenosis group and non-restenosis group according to the angiographic results. Subsequently, we oberserved whether the symptom and noninvasive tests were valuable in prediction of restenosis. The result showed that recurrence of angina, Holter ECG, submaximal exercise ECG and 99mTc-MIBI scintigraphy were useful in detecting restenosis with their specificity and sensitivity 75.7% and 72.0%, 71. 4% and 86. 7%, 66. 7% and 73. 1% ,76. 5% and 83. 3 %, respectively. Moreover, If any two of above four ischemic indexes were combined together to detect restenosis,the specificity and sensitivity were significantly enhanced (85. 2% and 92. 9%). It is concluded that recurrence of angina and the noninvasive tests were valuable in predicting restenosis. The combination of these ischemic indexes would greatly improve their predictive value.

Changes of circulating ET, A Ⅱ, CGRP after PTCA in the patients associated with acute coronary events / 中国介入心脏病学杂志

Percutaneous transluminal coronary angioplasty (PTCA) was done successfully in 33 patients,6 of them were associated with 8 acute coronary events. Radioimmunoassay was used for the determination of plasmaET,AII and CGRP levels. The samples were drawn successively from femoral artery just before PTCA and 0min, 15min,1h,3h,24h after the final balloon inflation. The results showed that the levels of plasma AII were higher in the complication group than those of noncomplication group before PTCA and 0min, 24h after PTCA. The differences in plasma ET levels before and after PTCA between the complication group and the non-complication group were not significant. The level of plasma CGRP was decreased at 15min and returned to basal level at 1h after PTCA in the complication group.In the patients without complication,there were no significant differences in their plasma CGRP levels before and after PTCA. All + ET/CGRP in the complication group raised more rapidly,recovered later and the peak appeared earlier than that of non-complication group. For a better understanding pathophysiologic meaning of the above changes,further studies are needed.

Evaluation of Intracoronary Electrocardiogram on Myocardial Ischemia During Percutaneous Transluminal Coronary Angioplasty / 中国介入心脏病学杂志

The changes of intracoronary electrocardiogram (IC-ECG) and surface electro-cardiogram (S-ECG) were recorded simultaneously during percutaneous transluminal coronary angioplasty(PTCA) in 33 cases of coronary heart diseases with 41 vessel lesions. The results sug-gested that ST-segment change rate on IC-ECG(90. 2%) was higher than that on S-ECG(56%). ST-segment elevation on IC-ECG was earlier and more significant than that on S-ECG. The IC-ECG appeared to be more sensitive than S-ECG for detecting myocardial ischemia. The technique for recording IC-ECG is simple and it can help to perfome the PTCA successfully.