Although systolic dysfunction is revealed as a prognostic factor in cardiac surgery, the role of diastolic dysfunction as a predictive factor is less evaluated. In this retrospective study from 872 ...patients that underwent isolated coronary artery bypass graft (Jan 2008-Feb 2009), 388 patients had normal left ventricular ejection fraction (>50%). These are divided in two groups, Group 1: 361 patients without diastolic dysfunction (impaired relaxation) and Group 2: 27 patients with diastolic dysfunction (impaired relaxation). Mean age in group 1 was 57.72 year and in group 2 was 61.16 year (P = 0.07). Risk factors such as diabetes mellitus, hypertention and dyslipidemia were similar. Although overall complication rate was higher in group 2 (11.1% vs. 2.8% P value 0.05), but when each complication was studied individually no significant statistical difference was found. Also no significant statistical difference was found in mortality (2.2% in group 1 vs 7.4% in group 2 P = 0.1). In conclusion, from clinical standpoint diastolic dysfunction can be an important factor in assessing surgical outcome in patients whom underwent coronary artery bypass grafting.
Introduction: The contributing factors of neural pressure and job stress exist in everyone’s life including heart diseases, high blood pressure, digestive diseases, neural and mental disorders, ...imbalance to make useful communications, absence and displacement, and increased wastes and accidents lead to job stress and burnout. Purpose: Present research aimed to evaluate the role of resilience to reduce job stress and burnout among employees of Iranian workers in satellite project of Iran offshore Oil Company. The research tools were Maslesh Burnout Inventory (MBI), Connor- Davidson Resilience Scale and HSE Management Standards Indicator Tool. Pearson’s correlation and regression analysis were used for data analysis. Results: The results indicated that the resilience has a negative and significant correlation with the components emotional exhaustion, depersonalization and total score of job burnout in terms of both frequency and severity while it has a positive and significant correlation to personal performance. Also, the resilience was shown to be negatively correlated with the components control, the colleague’s support, the manager’s support, communication, role, change and total score of job stress. In addition, there was a high correlation between subscales of job stress, as well. Conclusion: The analysis results revealed that the resilience can predict 24% of variance of frequency and job burnout while it can predict 18% of job stress variance.
Ag nanoparticles (AgNPs) catalyst has been synthesized by a simple and low-cost method using gelatin as organic precursor. Techniques of X-ray diffraction (XRD), transmission electron microscope ...(TEM) and energy dispersive X-ray (EDAX) were used to characterize the structure and properties of the Ag nanoparticles. Gelatin plays an important role in formation of the Ag nanoparticles. Moreover, glassy carbon electrode modified with Ag nanoparticles and multi wall carbon nanotube (AgNPs-MWNT/GCE) was prepared by casting of the AgNPs-MWNT solution on GCE. The sensor responded linearly to hydrogen peroxide (H
2
O
2
) in the concentration of 6 to 900 μM with detection limit of 4.2 μM at 3σ using amperometry. Also, AgNPs-MWNT/GCE was used for H
2
O
2
detection in real sample. The studied sensor exhibited good reproducibility and long-term stability. The produced nanosilver is stable and shows potential applications in the field of sensors, catalysis, fuel cells and nanodevices.
Although systolic dysfunction is revealed as a prognostic factor in cardiac surgery , the role of diastolic dysfunction as a predictive factor is less evaluated. In this retrospective study from 872 ...patients that underwent isolated coronary artery bypass graft(Jan 2008-Feb 2009),388 patients had normal left ventricular ejection fraction (>50%). These are divided in two groups, Group 1: 361 patients without diastolic dysfunction (impaired relaxation) and Group 2: 27 patients with diastolic dysfunction ( impaired relaxation) . Mean age in group 1 was 57.72 year and in group 2 was 61.16 year (P =0.07). Risk factors such as diabetes mellitus, hypertention and dyslipidemia were similar. Although overall complication rate was higher in group 2( 11.1% vs 2.8% P value 0.05),but when each complication was studied individually no significant statistical difference was found. Also no significant statistical difference was found in mortality (2.2% in group 1 vs 7.4% in group 2 P =0.1). In conclusion, from clinical standpoint diastolic dysfunction can be an important factor in assessing surgical outcome in patients whom underwent coronary artery bypass grafting.
"nAlthough systolic dysfunction is revealed as a prognostic factor in cardiac surgery , the role of diastolic dysfunction as a predictive factor is less evaluated. In this retrospective study from ...872 patients that underwent isolated coronary artery bypass graft(Jan 2008-Feb 2009),388 patients had normal left ventricular ejection fraction (>50%). These are divided in two groups, Group 1: 361 patients without diastolic dysfunction (impaired relaxation) and Group 2: 27 patients with diastolic dysfunction ( impaired relaxation) . Mean age in group 1 was 57.72 year and in group 2 was 61.16 year (P =0.07). Risk factors such as diabetes mellitus, hypertention and dyslipidemia were similar. Although overall complication rate was higher in group 2( 11.1% vs 2.8% P value 0.05),but when each complication was studied individually no significant statistical difference was found. Also no significant statistical difference was found in mortality (2.2% in group 1 vs 7.4% in group 2 P =0.1). In conclusion, from clinical standpoint diastolic dysfunction can be an important factor in assessing surgical outcome in patients whom underwent coronary artery bypass grafting.
To determine the rate of zero and five end-digit preference (EDP) for systolic and diastolic blood pressures (SBP and DBP, respectively) and risk factors amongst a representative sample of Iranian ...adults in the year 2011.
Data gathered from 7997 Iranian adults aged 25-70 were extracted from the database of the sixth Survey of Surveillance of Risk Factors of Non-communicable Diseases, which surveyed a total of 11,864 individuals aged 6 to 70 years. Multilevel multiple logistic regression was used to identify the independent factors associated with zero or five EDP.
The prevalence of three serial zero or five EDP for SBP and DBP were 18.5% (95% CI: 11.3%-25.7%). SBP ≥140 mmHg (OR = 0.78; 95% CI: 0.65-0.95), DBP ≥90 mmHg (OR = 0.71; 95% CI: 0.58-0.88), and a positive family history of diabetes (OR = 0.77; 95% CI: 0.66-0.9) were found as protective factors against zero or five EDP in blood pressure recording the male gender (OR = 1.18; 95% CI: 1.04-1.35) was found to be its independent risk factor.
Sex, SBP, DBP and family history of diabetes were found to be the main independent determinants of EDP in our country which underscores the importance of assessing the many patient-related factors in the studies involving EDP as part of BP monitoring in public health care.
We report a simple and effective strategy for fabrication of the nanocomposite containing chitosan (CS) and multiwall carbon nanotube (MWNT) coated on a glassy carbon electrode (GCE). The ...characterization of the modified electrode (CS‐MWNT/GC) was carried out using scanning electron microscopy (SEM) and UV–vis absorption spectroscopy. The electrochemical behavior of CS‐MWNT/GC electrode was investigated and compared with the electrochemical behavior of chitosan modified GC (CS/GC), multiwalled carbon nanotube modified GC (MWNT/GC) and unmodified GC using cyclic voltammetry (CV) and electron impedance spectroscopy (EIS). The chitosan films are electrochemically inactive; similar background charging currents are observed at bare GC. The chitosan films are permeable to anionic Fe(CN)63−/4− (FC) redox couple. Electrochemical parameters, including apparent diffusion coefficient for the Fe(CN)63−/4− redox probe at FC/CS‐MWNT/GC electrode is comparable to values reported for cast chitosan films. This modified electrode also showed electrocatalytic effect for the simultaneous determination of D‐penicillamine (D‐PA) and tryptophan (Trp). The detection limit of 0.9 μM and 4.0 μM for D‐PA and Trp, respectively, makes this nanocomposite very suitable for determination of them with good sensitivity.
CS‐MWNT film has been successfully deposited on GC electrode. Subsequently, FC can be adsorbed on this film and realize its electron transfer. The uniform CSMWNT film showed great enhancement of FC loading and improvement of its behavior. The fabricated sensor displays good stability and acceptable reproducibility. The FC/CS‐MWNT/GC electrode, simple and practical, can be a good electrochemical sensor for the direct determination of D‐PA and Trp.
The graphene oxide (GO) nanosheets were produced by chemical conversion of graphite, and were characterized by transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR). ...An electrochemical sensor based on Ni/graphene (GR) composite film was developed by incorporating Ni
2+
into the graphene oxide film modified glassy carbon electrode (Ni/GO/GCE) through the electrostatic interactions with negatively charged graphene oxide. The Ni
2+
/graphene modified glassy carbon electrode (Ni/GR/GCE) was prepared by cyclic voltammetric scanning of Ni/GO/GCE in the potential range from −1.5 to 0.2 V at 50 mV s
−1
for 5 cycles. The electrochemical activity of Ni/GR/GCE was illustrated in 0.10 M NaOH using cyclic voltammetry. The Ni/GR/GCE exhibits the characteristic of improved reversibility and enhanced current responses of the Ni(III)/Ni(II) couple. The introduction of conductive graphene not only greatly facilitates the electron transfer of Ni
2+
, but also dramatically improves the long-term stability of the sensor by providing the electrostatic interactions. Ni/GR/GCE also shows good electrocatalytic activity toward the oxidation of glucose. The Ni/GR/GCE gives a good linear range over 10 to 2700 μM with a detection limit of 5 μM towards the determination of glucose by amperometry. This sensor keeps over 85% activity towards 0.1 mM glucose after being stored in air for a month, respectively. Furthermore, the modified sensor was successfully applied to the sensitive determination of glucose in blood samples.
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