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Search Results: 1 - 10 of 532 matches for " Gholamreza Omrani "
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Recurrence rate of different techniques for repair of coarctation of aorta: A 10 years experience
Dehaki Maziar,Ghavidel Alireza,Givtaj Nader,Omrani Gholamreza
Annals of Pediatric Cardiology , 2010,
Abstract: Background and Aim : The main goal of this study was to assess the frequency of recurrent coarctation after repair using different surgical methods. Methods : Surgical results of repairs for coarctation of aorta (Co-A) in 188 patients under the age 14 years who were treated in Rajaee Heart Center, Tehran, Iran, were evaluated retrospectively. The most common methods included patch-graft aortoplasty (59%), resection with end-to-end anastomosis (20.7%) and subclavian flap aortoplasty (SCFA) (16.5%). The remaining patients underwent bypass tube graft and excision with placement of a tube graft. Seventy eight percent had discrete stenosis while 22% had long segment narrowing. The patients were followed for 81.6±32.8 months. Results : The overall mortality rate was 2.6%. The highest incidence rate of recoarctation was found in the patch-graft aortoplasty group (12.7%) and the lowest was found in SCFA (3.2%). The incidence of recoarctation in long-segment lesions was significantly higher than that in the discrete ones (30% vs. 4%, P<0.001). In patients <1 year, the incidence of recoarctation was lower than that in the other age groups. Conclusion : The patch-graft aortoplasty technique had the highest incidence of recoarctation and SCFA had the lowest rate. Long-segment Co-A had a higher chance of recoarctation. In contrast to some previous reports, the incidence of recoarctation was not higher in the age below 1 year.
Timely Diagnosis of Left Ventricular Posterior Wall Rupture by Echocardiography: A Case Report
Maryam Esmaeilzadeh,Ahmad Mirdamadi,Majid Kiavar,Gholamreza Omrani
Journal of Tehran University Heart Center , 2010,
Abstract: Left ventricular free wall rupture is responsible for up to 10% of in-hospital deaths following myocardial infarction. It is mainly associated with posterolateral myocardial infarction, and its antemortem diagnosis is rarely made.One of the medical complications of myocardial infarction is the rupture of the free wall, which occurs more frequently in the anterolateral wall in hypertensives, women, and those with relatively large transmural myocardial infarction usually 1-4 days after myocardial infarction.We herein present the case of a 66-year-old man suffering inferior wall myocardial infarction with abrupt hemodynamicdecompensation 9 days after myocardial infarction. Emergent transthoracic echocardiography revealed massive pericardialeffusion with tamponade, containing a large elongated mass measuring 1 × 8cm suggestive of hematoma secondary to cardiac rupture. In urgent cardiac surgery, the posterior wall between the left coronary artery branches was ruptured.
On The Numerical Solution of Two Dimensional Model of an Alloy Solidification Problem  [PDF]
Moeiz Rouis, Khaled Omrani
Modeling and Numerical Simulation of Material Science (MNSMS) , 2016, DOI: 10.4236/mnsms.2016.61001
Abstract: In this paper, a linearized three level difference scheme is derived for two-dimensional model of an alloy solidification problem called Sivashinsky equation. Further, it is proved that the scheme is uniquely solvable and convergent with convergence rate of order two in a discrete L-norm. At last, numerical experiments are carried out to support the theoretical claims.
Providing Appropriate Solutions for Treatment and Sewage of Wastewaters in Cargo Terminals of Shorelines: An Emphasis on Terminal Bandar  [PDF]
Gholamreza Mansourri
Open Journal of Ecology (OJE) , 2016, DOI: 10.4236/oje.2016.62009
Abstract: Low volume of produced wastewater and specific regional, environmental and economic condition in small communities determines the methods of treatment of sewage in such communities including shorelines of Bandar Abbas, Bushehr, Imam Khomeini Harbor and Chabahar Harbor. Ineffective methods of treating and sewing wastewater in aforesaid terminals as well as limitations of methods of wastewater treatment such as high level of underground waters doubled the necessity of considering alternative methods. In this paper, investigation of current conditions was performed through field observations and data collection regarding wastewater production in terminals and determination of qualitative specifications using sampling and carrying out pH, TSS, COD, BOD and temperature tests from inlet to outlet of available sewage system of abovementioned terminals and comparison with environmental organization standards corresponding to wastewater sewage and it was found out that conditions of available systems of wastewater treatment are not suitable. In this regard, modifying solutions for the sake of improving performance of systems of wastewater treatment of terminals is presented in this research. Finally, for wastewater treatment system of Bandar Abbas terminal, if there is no limitation for allocating lands, it is recommended to use artificial canebrake system with underground flow.
Hyperprolactinemia after laparoscopic ovarian drilling: An unknown phenomenon
Mohammad E Parsanezhad, Saeed Alborzi, Jaleh Zolghadri1, Maryam Parsa-Nezhad, Gholamreza Keshavarzi, Gholamhossein R Omrani, Ernst H Schmidt
Reproductive Biology and Endocrinology , 2005, DOI: 10.1186/1477-7827-3-31
Abstract: This is a prospective controlled study. Thirty-six women with PCOS underwent ovarian electrocauterization in university hospitals. Control group consisted of 35 ovulatory women with unexplained infertility. Hormonal assessment performed in early follicular phase of spontaneous or induced cycle before operation in the two groups and repeated one week after operation. Hormonal assay was also performed in the early follicular phase of the first post-operative menstruation, folliculometry and progesterone assay were also performed in the same cycle. Data were analyzed by "repeated measurement design, discriminant analysis, correlation coefficient, and Fisher exact test".Six to ten weeks after operation the serum mean +/- SD prolactin levels increased from 284.41 +/- 114.32 mIU/ml to 354.06 +/- 204.42 mIU/ml (P = 0.011). The same values for the control group were 277.73 +/- 114.65 to 277.4 +/- 111.4 (P = 0.981) respectively. Approximately 45% of subjects in PCOS group remained anovulatory in spite of decreased level of LH and testosterone. Prolactin level remained elevated in 73.2% of women who did not ovulate 6–10 weeks after the procedure.Hyperprolactinemia after ovarian cauterization may be considered as a possible cause of anovulation in women with polycystic ovaries and improved gonadotropin and androgen levels. The cause of hyperprolactinemia is unknown. Hormonal assay particularly PRL in anovulatory patients after ovarian cauterization is recommended.The polycystic ovary syndrome (PCOS) is associated with chronic anovulation and infertility. In most cases ovulation can be induced with clomiphene citrate (CC) but approximately 25% of patients fail to ovulate and require alternative treatment [1]. Human menopausal gonadotropins have been used but the risk of hyperstimulation and multifetal gestation [2]. A variety of surgical options for the treatment of PCOS have been applied during laparoscopy (biopsy, cauterization, laser surgery)[3]. Laparoscopic ovarian drillin
An Adaptive Method Based on High-Level Petri Nets for E-Learning  [PDF]
Fatemeh Omrani, Ali Harounabadi, Vahid Rafe
Journal of Software Engineering and Applications (JSEA) , 2011, DOI: 10.4236/jsea.2011.410065
Abstract: Adaptive learning is a new approach for e-learning systems. In comparison to traditional e-learning systems, which present same things for all learners, these systems automatically adapt with learner characteristics. In this paper, we are going to propose a new method for Adaptive learning, and consider adaptation from three viewpoints: 1) learner learning style, 2) learner’s knowledge level, 3) learner’s score. Due to similarity between learning objects graph and petri net, and In order to provide adaptive learning, we use an approach based on a high level petri net (HLPN).Also we propose a method to evaluate performance in this system. We compare our system with a non adaptive system, through our performance evaluating method. The results show response time for our system is less than non adaptive system and learners finish course in a relatively shorter period of time. Since our proposed system considers individual features of learner, we can be sure that learner would not be confused in learning materials.
Examination of the Level of Heavy Metals in Wastewater of Bandar Abbas Wastewater Treatment Plant  [PDF]
Gholamreza Mansourri, Mehrzad Madani
Open Journal of Ecology (OJE) , 2016, DOI: 10.4236/oje.2016.62006
Abstract: One of the main environmental pollutants is heavy metals. Due to extensive usage in industry, these metals enter biological cycle rapidly and contaminated water and soil resources rapidly. In this work, lead, copper, zinc and chromium of Bandar Abbas wastewater are examined. For this research, nine stations were set for measurement in urban level in Bandar Abbas and sampling of aforesaid metals was performed in fall and winter 2006 in these stations. After extraction and preparation operations using APDC-MIBK, samples were measured using flame atomic absorption system. According to results, concentrate of studied metals was lower than allowable standard value set by Iran environmental protection organization for agricultural purposes and sewage to ground level waters. In addition, efficiency of Bandar Abbas wastewater treatment plant to remove these metals is 40% - 70% from which highest removal is for zinc as much as 71.1% and lowest level is for copper as much as 40.5%. However, copper level was higher than allowable level for agricultural purposes in spring and summer (0.21 mg/L and 0.23 mg/L, respectively) and lower in fall and winter (0.103 mg/L and 0.098 mg/L, respectively). Furthermore, changes in concentration of metals in these stations in various seasons were measured and analyzed using one-way variance analysis and simultaneous effects of time and place on measured variables were analyzed using two-way variance analysis.
A PILOT PLANT FOR THE BIOGAS PRODUCTION
A. Omrani,M. Ghiasseddin
Iranian Journal of Public Health , 1988,
Abstract: Manure and Putreseible garbage are some of the main sources of pathogenic germs in countryside’s. On the other hand, demand for fertilizer and energy increases in rural areas every day. To study Potential of cow manure for these requirements a 16,5m3 pilot plant was designed and constructed as fermentation tank near animal husbandry of karaj Agriculture Faculty. Some 260kg cow manure and water with the ratio of 4 and 7 was fed to fermentation tank every day. Average daily biogas production was 3.4m3, which was burned successfully in a gas range. Gas production was reduced by 86% during coldest winter days. Design for control of gas pressure and reservation of excessive gas was successful. Concentration of nitrate in sludge increased by 1.6 folds compared to row material. Some bacteria and Parasites were reduced drastically.
Spontaneous Intra-cerebral Hemorrhage; Initial Clinical And CT Findings Tabriz - Emam and Razi Hospitals (1996 - 99)
Zinat M,Omrani M
Tehran University Medical Journal , 2003,
Abstract: Spontaneous intra-cerebral haemorrhage (SICH) is a relatively common neurological emergency, that is associated with significant morbidity and mortality. The goal of the present study was to estimate the neuro-imaging findings (initial CT scans), clinical presentation and possible risk factors in intra-cerebral haemorrhages."nMethods and Materials: The clinical and radiographic findings of 380 patients with intra-cerebral haemorrhage were analysed retrospectively. Patients with haemorrhage secondary to traumatism, brain tumour, or hemorrhagic infarction were excluded. 300 patients considered eligible for final analysis. All CT scans were evaluated to define the location and extension of bleeding."nResults: There were 160 men and 140 women, and the average age was 62 years, (range 26 to 87 years). The most common presenting symptom was consciousness (51 percent), headaches were present in 41.6 percent of patients, only 8.3 percent of patients were comatose at presentation. Location were lobar 36 percent, lenticular and thalamic 47 percent, possible risk factors included hypertension 60.3 percent anticoagulant treatment 9 percent and none 30.6 percent."nConclusion: Hypertension causes most cases, in which the SICH was located in the basal ganglia. Headaches were more commonly found in patients with cerebellar haemorrhage (70.3 percent). Intra-ventricular extension most frequently occurred in the thalamic haemorrhage and subarachnoid bleeding in lobar haemorrhage location. The majority of patients with SICH that resulted from hypertension were aged >45 years. The control of risk factors, particularly hypertension is crucial to prevention.
Saul Bellow s Seize the Day: A Modernist Study
Noorbakhsh Hooti,Vahid Omrani
Theory and Practice in Language Studies , 2011, DOI: 10.4304/tpls.1.3.252-262
Abstract: This study tries to analyze Saul Bellow’s Seize the Day from a modernist point of view. Bellow applies some narrative techniques which closely match those of the modernist diegetic process. The narrative has a potentially representative content which opens one’s horizons toward new sources of meaning and conceptual interpretation. The focal point, in this study, is to examine the epistemological level, individualism, stream of consciousness, pessimism and irony to see how tangibly these terms agree with the very context of the above-mentioned novel and to find out whether the purely abstract terms extracted from modernist theory can be concretized in a practical form. Furthermore, this study aims at scrutinizing in detail the frequency and the possibility of the modernist narrative elements in the very fabric and texture of fictional narrative in general.
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