Cardiovascular Diseases ; psychology ; Humans ; Life Style

Cerebral ischemic postconditioning refers to conduct a series of intermittent occlusion in order to reduce ischemia-reperfusion injury during the early reperfusion after cerebral ischemia.Because of its good prospects for clinical application,it has attracted widespread attention in recent years.This article reviews the neuroprotective mechanisms of ischemic postconditioning.

Objective: This work studied platelet-neutrophil aggregates (PNA) expression in patients with acute ST-segment elevation myocardial infarction (STEMI). Methods: Our research included in 2 groups: STEMI group, n=40 patients admitted in our hospital and Control group, n=30 normal subjects. Blood levels of PNA, platelet-monocyte aggregates (PMA) and platelet-lymphocyte aggregates (PlyA) were measured by lfow cytometry at admission and the results were compared between 2 groups. Results: Compared with Control group, STEMI group had similar blood levels of PlyA and PMA,P=0.245 andP=0.312; while increased blood level of PNA,P<0.05. Correlation analysis showed that platelet-leukocyte aggregates (PLA) level was positively related to CK-MB (r=0.4992,P<0.01) and cTnI (r=0.4365,P<0.01). Conclusion: Blood level of PLA, especially PNA was significantly higher in STEMI patients which suggested that increased PNA might be sued as a new index for AMI diagnosis in clinical practice.

Objective: To explore the relationship between endogenous estrogen level and myocardial no-reflow after reperfusion in postmenopausal acute ST-elevation myocardial infarction (STEMI) patients. Methods: A total of 100 postmenopausal STEMI patients with percutaneous coronary intervention (PCI) were enrolled and divided into 2 groups: Reflow group,n=77 and No-reflow group,n=23. Myocardial no-reflow was defined by TIMI≤2 grade or TIMI 3 grade and MBG≤2 grade after PCI. Blood levels of endogenous estrogen were examined before PCI; the relationship between endogenous estrogen level and myocardial no-reflow was assessed by Logistic regression analysis. Results: Compared with Reflow group, No-reflow group showed increased blood levels of estrone, estradiol, high sensitivity C-reaction protein (hs-CRP),P<0.05 and decreased sex hormone binding globulin (SHBG),P<0.05. Univariate analysis indicated that the length of lesion, thrombus score≥4, blood levels of estrone, estradiol and hs-CRP were positively related to no-reflow occurrence,P<0.05. Multi Logistic regression analysis presented that thrombus score≥4 (OR=4.994, 95%CI 1.987-10.518,P=0.035) and estradiol level (OR=4.091, 95% CI 1.105-8.582;P=0.046) were the independent risk factors for no-reflow occurrence. Conclusion: High blood level of endogenous estrogen was positively related to myocardial no-reflow after PCI in postmenopausal STEMI patients, which implied that endogenous estrogen might be the independent risk factor for no-reflow occurrence.

Objective To investigate the mental health status of patients with coronary artery stent implantation. Methods Symptom Checklist (SCL-90) was used to evaluate the mental health conditions of 218 patients after coronary artery stent implantation with man-machine conversation and computer evaluation. Results It was found that 48 cases in excellent mental health, accounting for 22.02%; 56 cases in good mental health condition, accounting for 25.69%; 82 cases in normal mental health condition, accounting for 37.61%; and 32 cases in poor mental health, accounting for 14.68%. In addition to the interpersonal factor, hostility and psychosis factors, the other six factors’overall average score was more than 2. More than 50% of the staff scored greater than 3, and their average positive factors were greater than 43 items in somatization, depression, anxiety and fear. Conclusion The patients after coronary artery stent implantation suffered from many psychological problems.

BACKGROUND: The preventative capabilities of enamel demineralization, rising from the fixed orthodontic treatment, have drawn tremendous attention in recent years. Despite a variety of investigations carried out by both domestic and foreign scholars, whereas, the results of ways to reduce the incidence of demineralization are never fully satisfactory or unified. OBJECTIVE: To evaluate the inhibitory effect of Fluor protector on enamel demineralization based on clinical practices during fixed orthodontic treatment.DESIGN, TIME AND SETTING: Contrast observation was performed in the Department of Stomatology, Qingdao Second Sanatorium, Jinan Military Area Command of Chinese PLA from January 2006 to January 2009. PARTICIPANTS: A total of 132 participants (856 teeth, aged 7-18 years, average age 10.5 years, 76 females and 56 males), who had wall-developed hardened dental tissues, no tetracycline pigmentation teeth, no dental fiuorosis, or anything that constricted in their teeth, were involved in the study. And all subjects were volunteers who had signed the informed consent form and agreed to receive dental treatment and periodic review.METHODS: All the teeth were randomly divided into two groups: experimental and control groups. Teeth for the experimental group were bonded with the supporting brackets with the Fluor protectors, whereas teeth for the control group did basically the same only without the Fluor protectors. After the fixed orthodontic treatment, the supporting devices were removed, all the teeth were fully washed, and then the conditions of the tooth surfaces were observed and documented in both experimental and control groups.MAIN OUTCOME MEASURES: The detection rate of orthodontic enamel demineralization in the two groups alter the fixed orthodontic treatment.RESULTS: After evaluation of the results of both groups, the incidence rate of enamel demineralization in the experimental group (5.51%) was obviously lower than control group (15.1%).CONCLUSION: Fluor protector has a significantly positive effect on preventing enamel demineralizaUon dudng fixed orthodontic treatment.

Objective To compare the biomechanical properties of single-segment and two-segment fusion for Denis type B spinal fracture.Methods Two female patients with Denis type B L1 vertebral fracture were enrolled in this study.The 45-year-old patient (Frankel B) underwent posterior reduction and fixation with pedicle screw system plus anterior two-segment fusion and the 41-year-old patient (Frankel C) underwent posterior reduction and fixation with pedicle screw system plus anterior one-segment fusion.The intervertebral fusion was achieved in both patients 1 year after operation.CT data of the two patients at 1 year after surgery was collected,including data of 41-year-old patient before and after removal of pedicle screws and data of 45-year-old patient without removal of pedicle screws.These three sets of data were imported into the Mimics software to establish T11-L2 three dimensional models.After construction of the models,they were imported into ANSYS software.An axial load (260 N) and 10 Nm torque were loaded to simulate the flexion,extension,lateral bending and rotation of the spine,respectively.Meantime,under above 6 kinds of motion form,the average displacement of the spine and the average Von Mises stress of T11-12 intervertebral disc were recorded and compared.Results There was no significant difference in the average displacement of the spine between two-segment fusion patient and single-segment fusion patient without removal of pedicle screws.However,under all motion forms,the average displacement of the spine of single-segment fusion patient after removal of pedicle screws was significantly higher than that before removal of pedicle screws and that of two-segment fusion patient.The average Von Mises stress of T11-12 intervertebral discs of two-segment fusion patient was significantly higher than that of one-segment fusion patient.Moreover,the average Von Mises stress of T11-12 intervertebral discs of single-segment fusion patient before removal of pedicle screw was higher than that after removal of pedicle screw.Conclusion Under the premise of satisfactory interbody fusion,removal of pedicle screws after one-segment fusion can increase spinal motion,reduce the stress of the adjacent intervertebral discs and delay disc degeneration.

Objective To evaluate the clinical efficacy of external biplanar mini-fixator and limited internal fixation in treatment of severe midfoot fracture-dislocation.Methods Eight patients with severe midfoot fracture-dislocation were admitted from May 2009 to August 2012.They were 6 men and 2 women,28 to 57 years of age (average,35.4 years).According to the Gustilo classification,there were one type Ⅱand 7 cases of type Ⅲ.Two cases of midfoot fracture were complicated with dislocation of the transverse tarsal joint,4 with dislocation of the tarsometatarsal joint,and 2 with dislocation of both the transverse tarsal joint and the tarsometatarsal joint.The external biplanar mini-fixator was applied to stabilize and maintain lengths of the medial and lateral columns and normal geometry of the foot arch after reduction of the fracture-dislocation.K-wires were used if limited internal fixation was necessary.The external fixator was removed at 12 to 16 weeks postoperatively.The clinical treatment efficacy was assessed by the American Orthopaedic Foot and Ankle Society (AOFAS) midfoot scale and the visual analogue scale (VAS).Results The patients were followed up for an average of 13.4 months (from 10 to 24 months).Postoperative radiological films showed fine reduction of the fractures and dislocations.No reduction was lost after removal of external and internal fixations.They were able to walk independently and had good functional recovery of the injured feet without traumatic arthritis during the follow-up period.Their average AOFAS scores were 65.8 at 3 months after operation,71.3 at 6 months and 80.6 at 12 months; the average VAS scores were 7.5 at 3 months,4.3 at 6 months,and 1.2 at 12 months,respectively.Conclusion In treatment of severe midfoot fracture-dislocation,external biplanar mini-fixator combined with limited internal fixation can perfectly reconstruct and maintain the medial and lateral columns and normal geometry of the foot arch,preventing functional disability caused by foot malformation.

Objective:To explore the clinical therapeutic effect of simvastatin combined cyclic adenosine monophos-phate on coronary heart disease (CHD)with chronic heart failure (CHF)and levels of serum-related factors.Meth-ods:A total of 78 CHD patients with CHF hospitalized in our hospital from Jan 2011 to Jan 2012 were selected. They were randomly and equally divided into simvastatin group and combined treatment group using number table, both groups received routine treatment,simvastatin group received simvastatin in addition, while combined treat-ment group received cyclic adenosine monophosphate based on simvastatin group.Therapeutic effect,changes of cardiac function indexes and serum factor levels were compared between two groups before and after treatment.Re-sults:The total effective rate of combined treatment group (92.31%)was significantly higher than that of simvasta-tin group (71.79%),P<0.05;compared with before treatment and simvastatin after treatment,there were signifi-cant rise in left ventricular ejection fraction [LVEF,(33.54±3.34)%,(43.41±3.23)% vs.(55.21±3.45)%] and transmitral early/late diastolic peak flow velocity [E/A,(0.63±0.11),(0.70±0.15)vs.(1.01±0.21)],and significant reductions in levels of brain natriuretic peptide [BNP,(536.74±21.41)ng/ml,(117.23±11.57)ng/ml vs.(78.20±10.92)ng/ml]and C reactive protein [CRP,(24.00±2.34)mg/L,(17.01±1.09)mg/L vs.(8.28± 0.81)mg/L]in combined treatment group,P<0.05~<0.01.Conclusion:Simvastatin combined cyclic adenosine monophosphate possess significant therapeutic effect on chronic heart failure of coronary heart disease,it can signif-icantly improve cardiac function and serum factor levels in CHD patients with chronic heart failure,and possess good clinical application value.

Objective:To investigate the mechanism of the effect of tonifying kidney recipes(TKR) on osseointegration of the Titanium Implants by established animal model of osteoporosis rats.Methods:Fifty-four female SD rats were randomly divided into three groups:A:Sham group, B:ovariectomy(OVX) group C:OVX+TKR group. After operation, tonifying kidney recipes was given orally in C group. The results were observed by bone histomorphometry. Results:Trabeculae area (Tb?Ar,%), trabeculae width (Tb?Wi), combined bone lamella width (CBLW), osteoblast number (OB?N) in C group were significantly increased compared with B group (P