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Search Results: 1 - 10 of 486 matches for " Serkan Saygi "
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Digoxin intoxication: An old enemy in modern era
Bahadir Kirilmaz,Serkan Saygi,Hasan Gungor,Ugur Onsel Turk
老年心脏病学杂志(英文版) , 2012,
Abstract: Objectives Although development of new treatment modalities limited digoxin usage, digoxin intoxication is still an important issue which could be easily overlooked. In this report, we analyzed a case series definitively diagnosed as digoxin intoxication in the modern era. Methods We analyzed 71 patients hospitalized with digoxin intoxication confirmed by history, complaints, clinical and electrocardiograph (ECG) findings, and serum digoxin levels > 2.0 ng/mL, during a five year period. The demographic and clinical data, indications for digoxin use, digoxin dosage, concurrent medications, laboratory data, hospital monitoring, and ECG findings were obtained from all patients. Results Thirty-eight of 71 patients (53.5%) had symptoms of heart failure during admission or later. Sixty-four percent of patients were older than 75 years. The percentage of females was 67%. Atrial fibrillation, hypertension and gastrointestinal complaints were more frequent in the females (64% in females, 30% in males, P = 0.007; 81% in female, 52% in males, P = 0.01; 50% in female, 17.3% in males, P = 0.008, respectively). The mortality rate during the hospital course was 7%. Conclusions This report demonstrated the reduced mortality rates in patients with digoxin intoxication over the study period. Gastrointestinal complaints are the most common symptoms in this population.
Analytical Evaluation of Energy and Electron Concentrations in Quantum Wells of the High Electron Mobility Transistors  [PDF]
Salih Saygi
Open Journal of Applied Sciences (OJAppS) , 2014, DOI: 10.4236/ojapps.2014.43014
Abstract: In this letter we propose analytical evaluation method for the electron density and the energy density in multi-layered high electron mobility transistors (HEMTs). The algorithm is used to simulate the variation of the electron density and the energy density against temperature of hetero-junction AlGaN/GaN. The proposed procedure guaranties the reliable application of the contribution of multi-layered HEMTs structure. In conclusion, the obtained results are estimated and discussed.
Non ST-segment elevation myocardial infarction in patient with essential thrombocythemia
Emin Alioglu, Nurullah Tuzun, Fahri Sahin, Buket Kosova, Serkan Saygi, Istemihan Tengiz, Ugur Turk, Nazan Ozsan, Ertugrul Ercan
Thrombosis Journal , 2009, DOI: 10.1186/1477-9560-7-1
Abstract: Essential thrombocythemia (ET) is a clonal disorder of unknown etiology involving a multipotent hematopoietic progenitor cell and is manifested clinically by the overproduction of platelets in the absence of a definable cause [1]. In 2008, the World Health Organization accepted the presence of the JAK2V617F mutation as a new diagnostic criterion for myeloproliferative neoplasms (MPNs) like polycythemia vera (PV), essential thrombocythemia (ET) and primary myelofibrosis (PMF) [2]. Platelets in this disorder also tend to be dysfunctional, in addition to being elevated in number [3]. The disease is associated with an elevated risk of thrombosis, hemorrhage, and vasomotor symptoms. Thrombotic events are not common but are usually deep venous thrombosis and pulmonary emboli [4,5]. Coronary artery involvement is uncommon. We present a case of coronary thrombus involving the right coronary artery in a patient with ET.A 68-year-old woman was admitted to our institution because of severe and sudden-onset chest pain. She underwent coronary angiography a year before which revealed a normal right coronary artery (RCA) with nonsignificant atherosclerotic lesions involving the other remaining coronary arteries. Her past medical history was significant for high platelet counts with a nonrevealing workup for myeloproliferative disease, and diabetes which was controlled medically. The patient's blood pressure on presentation was 135/70 mmHg with a heart rate of 70 beats/minute. Physical examination revealed splenomegaly without any other significant pathological findings. Electrocardiography showed regular sinus rhythm with ST segment depression in the inferior derivations. The patient was diagnosed as having acute coronary syndrome (ACS). She was transported immediately to the catheterization laboratory. Coronary angiography, performed via the right femoral artery, showed subtotal occlusion and thrombus-like filling defect in the mid portion of the RCA (Figure 1). The left circumfl
Digoxin intoxication: An old enemy in modern era

Bahadir Kirilmaz,Serkan Saygi,Hasan Gungor,Ugur Onse Turk,Emin Alioglu,Serdar Akyuz,Fatih Asgun,Istemihan Tengiz,Ertugrul Ercan,

老年心脏病学杂志(英文版) , 2012,
Abstract: Objectives Although development of new treatment modalities limited digoxin usage, digoxin intoxication is still an important issue which could be easily overlooked. In this report we analyzed a case series definitively diagnosed as digoxin intoxication in the modern era. Methods We analyzed 71 patients hospitalized with digoxin intoxication confirmed by history, complaints, clinical and electrocardiograph (ECG) findings, and serum digoxin levels > 2.0 ng/mL, during a five year period. The demographic and clinical data, indications for digoxin use, digoxin dosage, concurrent medications, laboratory data, hospital monitoring, and ECG findings were obtained from all patients. Results Thirty-eight of 71 patients (53.5%) had symptoms of heart failure during admission or later. Sixty-four percent of patients were older than 75 years. The percentage of females was 67%. Atrial fibrillation, hypertension and gastrointestinal complaints were more frequent in the females (64% in females, 30% in males, P = 0.007; 81% in female, 52% in males, P = 0.01; 50% in female, 17.3% in males, P = 0.008, respectively). The mortality rate during the hospital course was 7%. Conclusion This report demonstrated the reduced mortality rates in patients with digoxin intoxication over the study period. Gastrointestinal complaints are the most common symptoms in this population.
Software Competences of Geomatic Engineering  [PDF]
Serkan Aydin
International Journal of Geosciences (IJG) , 2015, DOI: 10.4236/ijg.2015.612102
Abstract: In this paper, it is both intended to effectively transfer and emphasize the relationship between geospatial data and software applications while presenting the learning activities which required software competences and presented some software techniques related with geomatic engineering. Effective software competence in geomatic is required for both the combination of information-communication technologies and interdisciplinary collaborative learning activities. The essential way to keep up with future competences is adaptation to different types of information technologies. Today, it is obviously seen that the using of interest-activated technology is a sine qua non condition of engineering education. The main focusing point of this paper is to present some learning suggestions while developing a software related course content in Geomatic to empower engineering education.
Affecting the Choice Factors of Fishery Products Consumption in Turkey
Saygi Hulya,Hekimoglu Muge Aliye
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2011.87.91
Abstract: This study examines fish consumption behavior patterns. The aim of this study was to evaluate the importance of choosing factors in determining food pattern of Turkish people. A total of 666 surveys in all around Turkey responded to a self-administered questionnaire about seafood consumption habits, past frequency of seafood consumption, attitude towards and intention to eat seafood. In this research some prompts were used such as health, taste, availability, versatility, the components of a good family meal, value for money and alternatives to red meat.
A Preliminary Investigation into Critical Thinking Skills of Urban High School Students: Role of an IT/STEM Program  [PDF]
Mesut Duran, Serkan Sendag
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.32038
Abstract: This paper reports the development of critical thinking of urban high school students in an IT/STEM program-using information technology (IT) within the context of science, technology, engineering, and mathematics (STEM). The study used a quasi-experimental time-series design, involving 47 initial participants in an eighteen-month intervention period. Data were collected from the Test of Everyday Reasoning (TER), which provides an overall score on critical thinking skill (CTS) and five sub-scale scores (analysis, inference, evaluation, inductive reasoning, and deductive reasoning). Findings indicate that based on a mean score of 15.77, the average participant scored between the 16th and 19th percentiles at the beginning of the program compared to an aggregated national sample. Participants who completed the program and responded to all three time-series TER tests (14) significantly improved their critical thinking skills throughout the program. Program completers’ overall post-program CTS test score was more homogeneous than the pre-program scores with a 20.07 mean score. In addition, data showed significant improvement in inductive reasoning skills of the program participants during the first nine months with continuing improvement in the second nine months. In contrast, data presented improved inference skills during the first nine months with significant gains during the second half of the program. The study estimates the relative effects of IT/STEM experiences with technology-enhanced, inquiry and design-based collaborative learning strategies on CTS of urban high school students.
De Novo Psychogenic Nonepileptic Seizures After Epilepsy Surgery: A Case Report
Irsel F TEZER,Aylin ULUSAHIN,Serap SAYGI
Journal of Neurological Sciences , 2007,
Abstract: Psychogenic nonepileptic seizures (PNES) are operationally defined as episodes of behavioral events similar to epilepsy, but caused by a psychological process and not associated with abnormal electrical discharges in the brain. About 20% of patients referred for epilepsy surgery centers presumed refractory epileptic seizures prove to have purely PNES. The differentiation of PNES from epileptic seizures is difficult. The management of PNES as epileptic seizures can lead to unnecesseray and inappropriate medical antiepileptic treatment. Moreover, the failure to recognize PNES and the psychological cause of the disorder can lead to suicide of the patient. Accordingly diagnosis of PNES or epileptic seizure can decrease the rate of mortality and morbidity. Several groups have observed the development of PNES after epilepsy surgery in patients with different localization and pathology of epileptic focuse. Reported incidence rates of such seizures vary between 1.8 and 8.8 %. We report here one patient who had PNES after surgery, in homogeneous group of 130 patients with mesial temporal lobe epilepsy and hippocampal sclerosis. Examining of semiological and elctrophysiolgical features of her attacks by video-EEG monitoring, prevent the incorrect diagnosis and treatment. Psychiatric evaluation of patients with refractory epileptic seizures before epilepsy surgery may be suggestive for effect of mood instability and occurance of PNES after surgery. Preventive strategies against these problems with colloboration can lead to better results. That case report suggest that psychiatrist, psychologist must be involved in addition to neurologist, neurosurgeon, neroradiologist, specialist in nuclear medicine for evaluation of epileptic patients before and after epilepsy surgery.
Towards Earthquake Shields: A Numerical Investigation of Earthquake Shielding with Seismic Crystals  [PDF]
Baris Baykant Alagoz, Serkan Alagoz
Open Journal of Acoustics (OJA) , 2011, DOI: 10.4236/oja.2011.13008
Abstract: Authors numerically demonstrate that the seismic surface waves from an earthquake can be attenuated by a seismic crystal structure constructed on the ground. In the study, seismic crystals with a lattice constant of kilometer are investigated in the aspect of band gaps (Stop band), and some design considerations for earthquake shielding are discussed for various crystal configurations in a theoretical manner. Authors observed in their FDTD based 2D wave simulation results that the proposed earthquake shield can provide a decreasing in magnitude of surface seismic waves. Such attenuation of seismic waves might reduce the damage in an earthquake.
Life Behavior of a System under Discrete Shock Model
Serkan Eryilmaz
Discrete Dynamics in Nature and Society , 2012, DOI: 10.1155/2012/238641
Abstract: We study the life behavior of a system which is subjected to shocks of random magnitudes over discrete time periods. We obtain the survival function and mean time to failure of the system assuming that the sizes of the shocks follow a discrete probability distribution under cumulative and mixed shock models.
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