Objective To study the anti-aging effect of caloric restriction in aged rats. Method Thirty-four male aged SD rats were randomly divided into 3 groups. The experimental groups were given 80% and 60% diet of the control respectively. After 6 months we measured serum SOD,MDA,IL-2,the activity of NO,MAO in brain tissue and apoptosis index of hepatocytes. Results The activities of NO in brain tissue,SOD and IL-2 in serum in experimental groups were significantly higher than those in control group. Serum MDA,MAO of brain tissue and apoptosis index of hepatocytes in experimental groups were lower than those in control. Conclusion Caloric restriction shows anti-aging biological effects in aged rats.

Cardiovascular Diseases ; Humans ; Shc Signaling Adaptor Proteins ; Src Homology 2 Domain-Containing, Transforming Protein 1

Objective To analyze the ischemia degree of initial electrocardiogram in the patients of acute ST-segment elevation myocardial infarction (STEMI) and investigate its value in the predicting cardiogenic shock (CS) after percutaneous coronary intervention (PCI).Methods Three hundred and ninety patients with STEMI from the onset of symptoms to admission within 12 h were divided into two groups based on grade Ⅱ ischemia (group A,248 cases) or grade Ⅲ ischemia (group B,142 cases) in the initial electrocardiogram.Clinical data,TIMI risk score,ST-segment resolution (STR),CS and cardiovascular events (hospital mortality,ventricular arrhythmias,reinfarction) were recorded in all patients.Results The gender,time from onset to balloon opening,smoking,hypertension,type 2 diabetes,hyperlipidemia,stroke,postoperative TIMI flow 3 grade,coronary artery lesions and lesions in the left main stem between two groups was not statistically significant (P ＞0.05).In group B,the rate of ST segment resolution ＞ 50％ was significantly lower than that in group A [53.2％ (132/248) vs.29.6％ (42/142)] (P ＜ 0.01).The incidence of CS,in-hospital death,malignant ventricular arrhythmias in group B was higher than that in group A,and the difference was statistically significant (P ＜ 0.05).The age,left ventricular ejection fraction,TIMI risk score ＞ 3 points,Killip grade ＞ 1 grade,anterior myocardial infarction between two groups was statistically significant (P ＜ 0.05 or ＜ 0.01).The indicators that were statistically significant in the univariate analysis were included into Logistic regression model and analyzed,with CS-related factors as independent variables and CS as the dependent variable and found that age (P =0.008),Killip class ＞ 1 grade (P =0.049),ST segment resolution rate (P =0.008) and grade Ⅲ ischemia (P =0.001) as independent predictors of CS after PCI.Conclusions Grade Ⅲ ischemia is an independent predictor of CS after PCI in STEMI patients.And it has predictive value for hospital mortality and ventricular arrhythmias.

Objective To analyze the value of plane QRS-T angle on prediction of malignant ventricular arrhythmia (MVA) occurred after emergency percutaneous coronary intervention (PCI) in patients with acute ST-segment elevation myocardial infarction (STEMI). Methods The clinical data of 418 patients with STEMI who underwent PCI within 12 h of symptom onset were retrospectively analyzed, and the patients were divided into plane QRS-T angle ≤ 90° group (324 cases) and plane QRS-T angle>90° group (94 cases) according to the plane QRS-T angle after PCI. The clinical data were compared between 2 groups. Results Compared with patients in plane QRS-T angle ≤ 90° group, patients in plane QRS-T angle > 90° group was older: (67.4 ± 11.8) years vs. (63.6 ± 12.0) years, QTc interval was longer: (438.60 ± 34.97) ms vs. (425.24 ± 25.49) ms, rate of left ventricular ejection fraction (LVEF) <45% was higher: 57.4% (54/94) vs. 35.8% (116/324), rate of using of beta-blockers was less: 74.5% (70/94) vs. 84.9% (275/324), but the incidences of hypertension and MVA were higher:79.8%(75/94) vs. 64.5%(209/324) and 10.6%(10/94) vs. 1.2%(4/324), and there were statistical differences (P<0.01 or<0.05). Logistic regression analysis showed that plane QRS-T angle >90° was an independent risk factor of MVA after PCI in STEMI patients (OR = 9.640, P =0.001), and using of beta-blockers was a protective factor (OR = 0.266, P = 0.028). Conclusions Plane QRS-T angle>90° is an independent risk factor of MVA after PCI in STEMI patients, while the use of beta-blockers is a protective factor. Paients with STEMI after PCI should be alert to the occurrence of MVA in the condition of plane QRS-T angle>90° and not taking beta-blockers.

Objective: Exploring the feasibility of the 2014 European Society of Cardiology(ESC)guideline′s risk prediction model for sudden cardiac death in hypertrophic cardiomyopathy (HCM Risk-SCD) in Chinese patients. Methods: The study population consisted of a consecutive cohort of 172 Chinese patients with HCM without prior sudden cardiac death (SCD) event who were in patients in Nanjing Drum Tower Hospital from December 2010 to October 2015.The endpoint event was a composite of SCD and appropriate implantable cardioverter-defibrillator (ICD) therapy.Clinical data were collected to calculate the 5-year SCD risk using the HCM Risk-SCD formula and to observe the actual risk during the follow-up.Receiver operating characteristic curves (ROC) and the area under curve (AUC) were calculated for the HCM Risk-SCD and risk stratification methods of the 2011 American Heart Association (AHA) guideline. Results: During follow-up of (2.69±1.36) years, five patients achieved the endpoint event.The predicated rate of SCD event using HCM Risk-SCD was (2.36±1.73)%, (1.93±0.78)%, (5.18±0.65)%, (8.77±2.38)% for all patients, low-risk group, medium-risk group and high-risk group respectively.However, the actual rate of SCD event was 2.91%, 1.27%, 25.00% and 14.29%, respectively.The AUC of 2014 ESC guideline and 2011 AHA guidelinewas 0.93(95%CI 0.85-1.00) vs. 0.87(95%CI 0.75-0.98). Conclusion The predicated rate of SCD event calculated by HCM Risk-SCD is lower than actual rate of SCD, but the prediction efficiency and indication for ICD implantation of HCM Risk-SCD are better than that of 2011 AHA guideline.

Objective:To investigate the clinical manifestations and related risk factors of patients with Pseudomonas aeruginosa (PAE) bloodstream infection, and to provide references for clinical diagnosis and treatment of PAE bloodstream infection after combining with bacterial resistance condition. Methods:The clinical data and biological data of all patients with PAE bloodstream infection who received treatment in the Third Affiliated Hospital of Wenzhou Medical University from January 2019 to December 2020 were analyzed retrospectively. The independent influential factors of PAE bloodstream infection were analyzed using binary logistic regression. Results:Eighty-three patients had PAE bloodstream infection. Among them, 71 patients were included in the final analysis. Among the 71 patients, 36 patients (50.70%) had carbapenem-resistant Pseudomonas aeruginosa ( CRPA). Univariate analysis showed that the history of hospitalization within 90 days ( χ2 = 3.90, P = 0.048), indwelling catheterization ( χ2 = 5.08, P = 0.024), septic shock ( χ2 = 4.00, P = 0.046), mechanical ventilation ( χ2= 12.35, P < 0.001), deep venous catheter ( χ2 = 4.08, P = 0.043), acute physiology and chronic health evaluation score II ≥ 10 points ( χ2 = 4.06, P = 0.044), and multi-drug resistance ( χ2 = 11.75, P = 0.001) were the suspicious influential factors of CRPA bloodstream infection. Multivariate logistic regression analysis showed that mechanical ventilation was an independent risk factor for CRPA bloodstream infection ( OR = 7.43, 95% CI 1.182-46.674, P = 0.032). Multi-drug resistance was an independent risk factor for CRPA bloodstream infection ( OR = 5.842, 95% CI 1.520-22.450, P = 0.010). Conclusion:Mechanical ventilation and multi-drug resistance are the independent influential factors of CRPA bloodstream infection. Invasive operations such as mechanical ventilation should be avoided in the clinic.