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Search Results: 1 - 10 of 461798 matches for " Shahmohammadi A "
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P. Akbari Asbagh A. Shahmohammadi
Acta Medica Iranica , 2004,
Abstract: Soon after successful results of balloon valvuloplasty in treatment of congenital pulmonary stenosis, use of this technique for relief of congenital aortic stenosis (AS) was attempted in different parts of the world. With the purpose of assessment the value of valvuloplasty in comparison with surgical valvotomy in relief of congenital AS, we retrospectively studied 115 patients with valvar AS, 48 of whom underwent balloon valvuloplasty (mean age 9.63 years), and 67 subjected to surgical aortic valvotomy (mean age 10.32 years), in a six year period from 1991 to 1997 at Rajaie heart hospital. Comparison of balloon valvuloplasty with surgical valvotomy revealed that reduction in the mean pressure gradient in balloon valvuloplasty group was greater than those subjected to surgical valvotomy (73.54 vs. 45.03 mmHg, P < 0.0001). Decreased incidence of aortic insufficiency and mortality in balloon valvuloplasty in comparison with surgical valvotomy are other notable points in this study. Although it is difficult to compare the results of the two procedures and determine their different indications, our successful experience with balloon valvuloplasty for congenital AS and the safety of this procedure encourage us to use this technique for the patients with congenital AS more than ever. These results must be supported by future studies.
One-year outcome of Senning operation in children with transposition of the great vessels
Shahmohammadi A,Mortezaian H,Alipour MR
Tehran University Medical Journal , 2011,
Abstract: "nBackground: Nowadays, the treatment of choice for anatomical correction of transposition of great arteries is arterial switch but some children are not good candidates for this operation. In these cases atrial switch or Senning procedure is an accepted method, thus outcome of this procedure needs to be better delineated."n "nMethods: This prospective study included 65 patients that underwent Senning operation in Shahid Rajaee Hospital in Tehran, Iran from 2002 to 2009 and were followed-up for one year."n "nResults: The early and late mortality rates were 16.9% and 1.5%, respectively. 51.8% of early deaths were due to simple Senning procedure, 38.9% due to a Senning with the closure of ventricular septal defect, with or without the repair of pulmonary artery stenosis, 9.3% related to palliative Senning and one late death due to simple Senning. The most common arrhythmia was accelerated junctional rhythm (18.5%). 15% of cases had Senning pathway obstruction and 1.7% had baffle leaks. Regardless of the mortalities, three patients (5.7%) had significant tricuspid regurgitation. Right ventricular systolic dysfunction was found in 13.3% of the cases, primarily in Senning with ventricular septal defect closure (37.5%). One case (1.9%) had visible cyanosis and three (5.7%) had exertional dyspnea but 94.3% of cases remained in functional class I."n "nConclusion: Since the majority of deaths following Senning procedure occur during the first month, especially on the second day post-operatively, assiduity during early post-operative period is crucial. Tricuspid regurgitation or right ventricular systolic dysfunction was not detected in most patients, suggesting optimistic prognosis for these patients.
One and a Half Ventricular Repair for Uhl’s Anomaly with One Year Follow Up
M Moradian,A Shahmohammadi,MA Yoosefnia,K Mozaffari
Iranian Cardiovascular Research Journal , 2011,
Abstract: Uhl’s anomaly is characterized by complete or partial absence of themyocardium of the right ventricle, with apposition of the endocardium andepicardium. We report our experience with surgical treatment of this anomaly.
Antidiabetic Effect of Salvia verticillata L. Aerial Parts in Normal and Streptozotocin-induced Diabetic Rats
A. Eidi,M. Eidi,P. Shahmohammadi,V. Mozaffarian
International Journal of Pharmacology , 2011,
Abstract: Herbal medicine has been used for many years by different cultures around the world for the treatment of diabetes. Salvia verticillata L. was investigated for its possible antidiabetic effect in normal and streptozotocin-induced diabetic rats. The animals were made diabetic using by streptozotocin (70 mg kg-1, i.p.). The ethanolic extract (0.05, 0.1 and 0.2 g kg-1) were administered orally. The control groups were administered saline. Oral administration of ethanolic extract of Salvia verticillata aerial parts for 14 days on the level of serum glucose, total cholesterol, triacylglycerol, urea, uric acid, creatinine, aspartate aminotransferase and alanine aminotransferase in normal and streptozotocin-induced diabetic rats were evaluated. At the end of the experiment, rats were fasted overnight and blood samples were collected. A comparison was made between the action of extract and a standard antidiabetic drug, glibenclamide. Oral administration of 0.05, 0.1 and 0.2 g kg-1 b.wt. of the ethanolic extract of Salvia verticillata aerial parts for 14 days exhibited a significant reduction in serum glucose, total cholesterol, triglycerides, urea, uric acid, creatinine, aspartate aminotransferase, alanine aminotransferase and increased plasma insulin in diabetic rats. It also prevents body weight loss in diabetic rats. The administration of extract did not change these serum parameters in normal rats. The antidiabetic effect of the extract was similar to that observed with glibenclamide. So, our study revealed the anti-diabetic potential of Salvia verticillata and this study could be helpful to develop medicinal preparations for diabetes and related symptoms.
Nayereh Shahmohammadi
Academic Research International , 2011,
Abstract: Like any other part of the world, the ICT revolution has influenced almost every aspect of public life in Iran including education. As a developing nation, the need to take appropriate measures to overcome the digital divide is being felt more urgently in Iran as compared to any other country. Iran is not a late starter by any means in this regard. The Government of Iran has initiated multiple actions to keep pace with the latest developments in information technology.The very fact that a large number of professionals engaged in knowledge industry the world over belong to Iran speaks highly of the Iran initiatives in IT education. However, this is only indicative of the qualitative aspect. In terms of quantity, a large number of people are yet to be covered to make a real breakthrough. It is being increasingly realized that a faster way of achieving competency in this field is to integrate it with general education at all levels. For this, the training of teachers in ICT skills is a must. The various schemes and programs have been launched both at government and non-governmental levels to develop ICT skills in teachers.Various universities in Iran have designed specific courses for this purpose. However, in a big country like Iran with millions of teachers at different levels, it is indeed difficult to produce ICTenabled teachers at a large scale within a short period. The problems are complex and issues are numerous. The paper presents an overview of some of the initiatives in this area and highlights the relevant issues, and at the same time indicates directions for future course of action.
Hydraulic Simulation of Sprinkler Irrigation Laterals
R. Shahmohammadi,S. M. Mirlatifi,K. Mohammadi
Journal of Science and Technology of Agriculture and Natural Resources , 2007,
Abstract: A computer model (SprinklerMod) was developed to simulate hydraulics of sprinkler irrigation systems. The objective of this paper is to describe mathematical background of this model for simulating pressures and discharges of sprinklers along the laterals. The model is capable of designing two types of laterals: laterals with fixed sprinklers and laterals with portable sprinklers. The model shows the simulation results in the forms of tables and graphs. Laterals with one or two diameters on uniform or non-uniform slopes can be designed. The model provides graphical presentation of percentage of sprinkler pressure variations for different lateral inside diameters. The Hazen- Williams equation was used for the calculation of friction losses. The required input parameters for lateral simulation are lateral type, desired sprinkler operating discharge and pressure head, spacing between sprinklers, distance of first sprinkler from lateral inlet, number of sprinklers operating on the lateral, riser height, Hazen- Williams pipe friction coefficient and lateral longitudinal slope or field elevations at each of the sprinklers on the lateral. Laterals are simulated such that average sprinkler pressures and discharges become equal to the values requested by the designer. Iterative procedures were implemented to simulate sprinkler pressures and discharges on laterals and the Newton- Raphson iterative method was used for calculating pressure of each of the sprinklers on the laterals with portable sprinklers. In order to evaluate the model, some example results of the model were compared with classical design results. Since there is no formula for the calculation of the required lateral inlet pressure in classical design of laterals with portable sprinklers in the scientific references, a new formula was developed. Averages of absolute percentage of variations of lateral inlet pressures for laterals with fixed sprinklers and with one or two-size diameters ranged from 0.3 to 0.7 percent, respectively. This value for laterals with portable sprinklers was 0.1 percent.
Study of students' mental images effect on learning chemistry
Rasol Abdullah Mirzaie,Masoumeh Shahmohammadi,Amrollah Kouhi
Eurasian Journal of Physics and Chemistry Education , 2010,
Abstract: It is clear that use of images has effect on teaching the chemistry concepts. In classrooms, some examples which are used for simplifying and understanding the material better are in macroscopic dimension and students do not understand particles such as atoms, molecules and ions well. In order to help them understand these concepts in macroscopic dimension, illustration is used. In illustration, students can reflect different concepts of chemistry which have learnt during teaching. One of the illustration methods is to use painting art, as one can determine the extent to which they have understood from chemistry concepts and relationship among different areas of the sciences, society and technology by studying paintings of these students. The Aim of this research is to determine through their paintings whether students have understood the taught concepts in chemistry of the first grade of high school in IRAN or not. These chemistry subjects include water, atmosphere, minerals and fuel. After teaching the above topics, the students were asked to select a subject at their will and paint about it. This research has been performed in two separate cities in IRAN but it has been implemented in equal age groups and it was specified that different places of residence had effects on selection of painting subject. Our experience showed that use of this method led to deep learning in the students and provided the opportunity for them to express their beliefs in scientific concepts in their own way and language. On the other hand, teacher performs a kind of continual evaluation in this way and understands students’ misconceptions and tries to remove these errors before beginning new subject. This method is interesting for students so that most of them mentioned that painting the chemistry was new and interesting experience.
Scientific Profiles in the field of Biomarkers (2000-2010)
Mohammad Hosein Biglu,Sahar Biglu,Mehdi Saberian Brojeni,Giti Shahmohammadi
International Journal of Information Science and Management , 2013,
Abstract: Biological marker is a term used in many scientific fields and was introduced as a measurable element or a clinical indicator in the abnormal biological processes, pathological condition, or pharmacological intervention. Science Citation Index Expanded (SCI-E) from database of Web of Science (WoS) was used to extract all publication indexed as a topic of "Biomarkers" during a period of eleven years through 2000-2010. Extracting of data was restricted to the tag of topics (TS = Biomarkers) from advanced search menu. A total number of 37397 records were extracted on 5 May 2013 and went under analysis. In this study the papers originated jointly by multiple authors from different countries were defined as ones for each country. The study showed that the number of publication in the field of biomarkers showed an increase through the period of study. The number of publication in 2010 was greater than 10 times in 2000. More than 98% of publication was in English. The majority of publication (68%) was in the form journal article. Harvard University, sharing 1,128 papers in the field, was the most prolific university among institutes. The USA contributing 33% of world`s profile in the field was the most productive country. Based on the Bradford`s scattering law, the journal of "Cancer Epidemiology Biomarkers Prevention" publishing 3.12% of world`s publication was the most prolific journal among core journals. Analysis of data concluded that oncology was the most interesting subject area of scientists in the field of Biomarkers through the last decade.
Changes in Functional Status and Functional Capacity Following Coronary Artery Bypass Surgery
Z. Esmaeili Douki,N. Vaezzadeh,M. Zakizad,S. Shahmohammadi
Pakistan Journal of Biological Sciences , 2010,
Abstract: The aim of the present study was to compare changes in health related-quality of life (H-RQOL) on physical functioning and mental health domains, changes in functional capacity before and 18 months after CABG surgery. Comprehensive data on 187 patients who underwent CABG surgery were prospectively collected, including preoperative factors and postoperative morbidity. Assessing functional status, the change in physical functioning score and change in mental health score were obtained using the physical functioning and mental health subscales out of the eight total subscales of the (SF-36) questionnaire. Also, functional capacity was estimated according to New York Heart Association (NYHA) class. The results showed 18 months after CABG surgery survival rates were (95.7%). Significant improvements in functional status were seen in physical functioning (p<0.001), mental health (p<0.000). However, there were no significant changes in the mean of functional status scores among patients in three age groups. Other significant improvement was found in functional capacity and NYHA class before and the 18 months after CABG. Functional status markedly and significantly improved after CABG surgery, particularly in physical functioning. However, the functional status among survivors of CABG surgery is worse than that of the general population. It seems further research is needed to identify factors explaining the change in H-RQOL to develop interventions to support patients.
The Relationship Between Maternal Serum Magnesium Level and Preterm Birth
S. Khani,M. Shokrzadeh,P.k Karamoddini,S. Shahmohammadi
Pakistan Journal of Biological Sciences , 2010,
Abstract: The aim of this study was to evaluate the relationship between maternal serum magnesium levels and preterm birth. This Nested case-control study carried out on 20 with preterm birth and 20 women at term birth at Imam Khomeini Hospital in Sari/Iran in 2008. The women with singleton gestation and intact fetal membrane suspected to preterm labor (case group), 10 cc blood samples were drawn into syringes and sent to laboratory of the hospital immediately. Sampling for control group was same as the case group. These samples recognized as control group just as birth occurring after week 37. Finally, serum magnesium level measured. Data analyzed using χ2, t- test and OR (Odd's Ratio). There was a relationship between the number of prenatal visits (p = 0.008) and stressful events associated with preterm birth (p<0.02). Serum magnesium level was associated with preterm birth OR = 4.75, CI 95% = (0.48-46.91), Sensitivity, specificity, positive and negative predictive value of serum magnesium for preterm birth was 95, 50, 66.5 and 83.33%, respectively. Although, there was a correlation between serum magnesium levels and preterm birth, due to methodology of the study, a cohort study with the same cut off point and supplementation of magnesium in RTC studies is recommended.
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