17 results on '"DEMİR, Tolga"'
Search Results
2. In Press, Corrected Proof: Crowdfunding as gambling: Evidence from repeated natural experiments
- Author
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Demir, Tolga, Mohammadi, A., Shafi, K., and Demir, Tolga
- Subjects
Peer-to-peer lending ,Gambling ,Fin-tech ,Crowdfunding ,Lottery - Abstract
Lenders in Prosper, one of the largest lending markets in the U.S., reduce their activity when playing multistate Powerball or Mega Millions lottery jackpot becomes attractive. This finding suggests that the desire for sensation seeking is an underlying motivation for participating in peer-to-peer crowdfunding markets; the thrill of winning a large lottery jackpot fulfills some lenders' desire for novelty and sensation seeking, thus decreasing their lending activity. We discuss our findings' implications for lenders, borrowers, platform organizers, and policymakers.
- Published
- 2021
3. The Evaluation of YouTube™ English Videos' Quality About Coronary Artery Bypass Grafting.
- Author
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Cetin, Hakki Kursat, Koramaz, Ismail, Zengin, Mehdi, and Demir, Tolga
- Subjects
CORONARY artery bypass ,MEDICAL personnel ,VIDEOS ,MEDICAL care - Abstract
Objectives: The aim of the study was to clarify the reliability and quality of English videos about Coronary artery bypass grafting on YouTubeTM. Methods: The study was performed between July 16 and July 30. A cardiovascular surgeon searched for terms including "coronary artery disease," "coronary artery treatment," "coronary artery bypass" and "coronary artery bypass surgery," in YouTubeTM. All videos were classified into two groups according to the source who uploaded the video as professional videos and non-professional videos. Video characteristics including duration of video on YouTube™, length of video, and view numbers for each video were recorded. Moreover, the numbers of "comments," "likes," and "dislikes" were noted. Furthermore, the target audience of the videos (professional health care worker and patients) was analyzed, DISCERN score and Global quality score (GQS) were calculated for each video. Results: Totally, 812 videos were divided into two groups according to upload sources; 448 videos were categorized as professional videos and 364 videos were categorized as non-professional videos. The mean number of views was 3220.5 for professional videos and 2216.5 for non-professional videos (p=0.001). In addition, the mean "like" numbers and mean comment numbers were significantly higher for professional videos (p=0.001 and p=0.001). The mean DISCERN score was 2.6 for professional videos and 1.5 for non-professional videos (p=0.001). Similarly, the mean GSQ was significantly higher for professional videos (3.5 vs. 2.5, p=0.001). Conclusion: YouTube™ videos which are shared by professional healthcare workers have better quality and reliability with signifi- cantly higher DISCERN score and GQS. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
4. The Evaluation of Cardiovascular Surgery-Associated Google Search Trends During COVID-19 Waves.
- Author
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Cetin, Hakki Kursat, El Kilic, Helin, Koramaz, Ismail, and Demir, Tolga
- Subjects
CARDIOVASCULAR surgery ,COVID-19 pandemic ,CORONARY angiography ,PUBLIC interest - Abstract
Objectives: The aim of the study was to clarify public interest about cardiovascular disease during the COVID-19 pandemic using Google Trends (GT). Methods: The study was performed between November 20 and December 1, 2021. A total of 21 keywords related to cardiovascular surgery were selected. Public attention to all selected keywords was analyzed by GT with using the filters "web search," "all categories," and "Turkey." In Turkey, three COVID-19 waves (between March 12, 2020, and May 8, 2020, November 24, 2020, and January 20, 2021, and March 20, 2021, and May 16, 2021) were experienced since the beginning of the pandemic. To analyze public attention to cardiovascular surgery during the COVID-19 waves, 8-week periods during the COVID-19 waves were compared with the same times in the past 4 years (2016-2019). Results: Comparisons of March 12-May 8 2020 and the same period between 2016 and 2019 showed that total public interest about cardiovascular surgery was significantly decreased (-28.7%, p=0.001). The comparison of the second COVID-19 wave (November 24, 2020-January 20, 2021 versus November 24-January 20, 2016-2019) revealed that public interest about cardiovascular surgery was significantly lower in the COVID-19 era (-22.2%, p=0.001). Comparison of the third COVID-19 wave and the same periods in the previous 4 years demonstrated that public interest about cardiovascular disease was significantly lower in the COVID-19 era (-8.5%, p=0.001). In contrast, the term coronary angiography was searched significantly more during the third wave of COVID-19 in comparison to the same periods between 2016 and 2019 (17.9%, p=0.015). Conclusion: Our study demonstrated that public interest in cardiovascular diseases was significantly decreased in all waves of the COVID-19 pandemic. However, interest in only the term coronary angiography was significantly increased in the third wave of pandemic. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
5. Video case report of a rare parathyroid pathology: Contributions of indocyanine green angiography to mediastinal parathyroid surgery.
- Author
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Çetinoğlu, Işık, Köstek, Mehmet, Çalışkan, Ozan, Ünlü, Mehmet Taner, Aygün, Nurcihan, Demir, Tolga, and Uludağ, Mehmet
- Abstract
This article discusses a rare case of mediastinal parathyroid adenoma and the use of indocyanine green angiography during surgery. The patient, a 55-year-old female, presented with symptoms of hyperparathyroidism and underwent sternotomy with intraoperative indocyanine green angiography. The procedure allowed for visualization and removal of the enlarged parathyroid tissue, as well as the detection of thymic tissue involvement. The use of indocyanine green angiography was found to be beneficial in reducing operation time, guiding surgical orientation, and preventing persistent hyperparathyroidism. [Extracted from the article]
- Published
- 2024
- Full Text
- View/download PDF
6. Mavisel Yener'in öykü ve romanlarındaki çok kültürlülük öğelerinin incelenmesi
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Demir, Tolga, Akkaya, Nevin, and Türkçe ve Sosyal Bilimler Eğitimi Ana Bilim Dalı
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New Turkish literature ,Türk Dili ve Edebiyatı ,Eğitim ve Öğretim ,Education and Training ,Yener, Mavisel ,Children’s literature ,Turkish Language and Literature ,Story ,Turkish literature ,Turkish education ,Multiculturalism ,Education - Abstract
Bu çalışma; çocuk edebiyatı yazarlarından Mavisel Yener'in öykü ve romanlarının çok kültürlülük bağlamında incelenmesini içermektedir. Çalışma kapsamında yazarın farklı yayınevlerinden çıkan öykü ve roman türündeki 28 kitabı nitel araştırma yöntemlerine bağlı kalarak içerik analizi yöntemi kullanılarak incelenmiştir.Çalışma kapsamında öncelikle çok kültürlülük, çok kültürlü eğitim, çocuk edebiyatı, çok kültürlü çocuk edebiyatı konu başlıklarında kuramsal çerçeve oluşturulmuştur. Ardından Mavisel Yener hakkında kısa bir öz geçmiş verilerek alan yazında çalışma konusuyla ilgili daha önce yapılan bilimsel araştırmalar ve yayınlar hakkında bilgi verilmiştir.Çalışmada Mavisel Yener'in öykü ve romanları çok kültürlülük bağlamında beş ayrı üst tema ışığında değerlendirilmiştir. Bu üst temalar; 'Etnik Unsurlar' (ırk/yabancı, dil, din, cinsiyet, ortak insanlık ülküsü alt temalarına ayrıldı.), 'Dezavantajlı Gruplar' (engelli olma, kadın olma, çocuk olma, yaşlı olma, düşük sosyal statülü olma, bireysel farklılıklar, fiziksel farklılıklar alt temalarına ayrıldı.), 'Kültürel Değerler' (yemek kültürü, tarihi ve kültürel değerler, baskın evrensel kültür alt temalarına ayrıldı.) 'Diğer Varlıklara Saygı'(doğa sevgisi ve hayvan sevgisi alt temalarına ayrıldı.) ve 'İletişim' (çocuk-yetişkin iletişimi alt temasında değerlendirildi.) olarak belirlenmiştir. Çalışmada incelenen kitaplar ikişer defa okunarak söz konusu temalara ait iletiler kodlanmıştır. Tespit edilen iletilerin güvenirlik ve geçerliliğinin sağlanması amacıyla Miles ve Huberman modelinde içsel tutarlılık olarak bilinen kodlayıcılar arası görüş birliği formülü uygulanarak iki farklı kodlayıcı ile araştırmacının kodları arasında benzerlik oranı hesaplanmış ve güvenirlilik oranı sağlanmıştır.Elde edilen bulgular ışığında Mavisel Yener'in öykü ve romanlarının çok kültürlülük öğelerini içerdiği, yazarın kitaplarında yer alan iletilerin çocuğun dünyasında farklılıklara yönelik olumlu düşünceler uyandıracak şekilde yapılandırdığı tespit edilmiştir. Üst temalar ışığında; yazarın etnik unsurlara yönelik kullanımlarında genel olarak farklı ırk, dil, din, cinsiyet öğelerine yönelik olumlu iletileri tespit edilmiştir. Bununla birlikte yazarın, toplumdaki dezavantajlı gruplara yönelik yaşanan sıkıntılara kitaplarında yer verdiği; tarihi ve kültürel değerlerin aşınması tehlikesi karşısında çocukları uyardığı, kitaplarında insan dışındaki diğer canlılara saygı duyacak kullanımlarda bulunduğu; ayrıca hem ailelere hem eğitimcilere çocuk ile iletişimde doğru ve yanlış uygulamaları gösterdiği görülmüştür. Ayrıca incelenen kitaplar yazarın resmi internet sitesindeki sınıflandırmaya sadık kalınarak hedef kitle olarak yaş gruplarına ayrılmış; çok kültürlülük öğelerine yönelik iletilerin 9-11 yaş grubuna yönelik daha az olduğu, 11-13 yaş grubu ve 13 yaş üzeri gruba yönelik kitaplarında ise daha fazla olduğu belirlenmiş ve böylece ileti sayısının kademeli olarak arttığı saptanmıştır. Sonuç olarak Türkçe eğitiminde farklılıklara saygı ve çok kültürlü ortamda birlikte yaşama arzusunu güçlendirme amacıyla ders kitabı metinlerinin ve çocuklara tavsiye edilebilecek kitapların seçiminde Mavisel Yener'in öykü ve romanlarının bu amaçlara yönelik uygun birer eğitim-öğretim materyali olabileceği bulgulanmıştır.Anahtar Kelimeler: Türkçe eğitimi, çocuk edebiyatı, çok kültürlülük, çok kültürlü eğitim, çok kültürlü çocuk edebiyatı. This study includes the analysis on stories and novels of Mavisel Yener, a children's literature author, on a multicultural basis. In the context of this study 28 stories and novels of the author's books which are published by various publishers have been analysed by using content analysis adhering to qualitative research methods.At first, a theoretical framework has been formed on the subject headings of multiculturalism, multicultural education, children's literature and multicultural children's literature on the scope of this study. Then, after giving a short biography about Mavisel Yener, information is stated about the previous scientific researches and publications on study context of field literature.In this study, the stories and the novels of Mavisel Yener are evaluated in five various upper themes on the basis of multiculturalism. These upper themes are defined as `Ethnical Elements` (later separated into subthemes of race/foreign language, religion, gender, common humanity ideals.), `Disadvantageous Groups` (later separated into subthemes of being disabled, woman, child, adult, with a low status, individual differences, physical differences.), `Cultural Values` (later separated into subthemes of cuisine culture, historical and cultural values, dominating universal culture.), `Respect to Other Creatures` (later separated into subthemes of love of nature and animal) and `Communication` (later evaluated within the communication between child-adult.)The books analyzed within this study have been read twice and then messages of the themes in question are coded. In order to ensure the reliability and validity of the detected messages, the similarity rate of the codes between two different encoders' and the researchers has been calculated and reliability rate has been ensured by applying the formula of common consensus of encoders known as intrinsic consistency in Miles and Huberman model.In the light of the findings acquired, it has been detected that the stories and novels of Mavisel Yener include multicultural elements, and the messages found in the author's books are structured in such a way that they can stimulate positive thoughts about the differences in the world of the child. In the light of top themes, it has been found that there are generally positive messages on different race, language, religion and gender in the author's usage of ethnic elements. It has also been detected in her books that the author mentions the difficulties that disadvantaged groups experience; that she warns children about the risk of erosion of historical and cultural values, uses statements that respect everything besides human; also it is seen that she points the right and wrong attitudes while communicating with a child both to the parents and educators. Moreover, it is detected that the books analyzed have been devoted to age groups as the target group by adhering to the author's official website; the number of the messages on multiculturalism are less for the age group of 9-11, are more in the books for the age group of 11-13 and over 13 and thus the number of the messages gradually increase.As a result, it has been detected that the texts in the stories and novels of Mavisel Yener's books can be suitable education-teaching materials for these purposes in the selection of the texts and books that can be recommended to the children to reinforce respect to differences in Turkish education and desire of living together in a multicultural environment.Key Words: Turkish education, children's literature, multiculturalism, multicultural education, multicultural children's literature. 166
- Published
- 2019
7. Kavram olarak ötekiye göre Sevim Burak'ın tiyatro metinlerinin incelenmesi
- Author
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Demir, Tolga, Korukçu, Münip Melih, and Drama ve Oyunculuk Ana Sanat Dalı
- Subjects
Sahne ve Görüntü Sanatları ,Burak, Sevim ,Subject-object relation ,Theater plays ,Otherness ,Theatre ,Performing and Visual Arts - Abstract
Kavram olarak öteki; insanın doğası gereği bir başka insana ihtiyaç duyması, insanın sosyal bir varlık olması gereği, yaradılışı icabı ortaya çıkmaktadır. İnsanlık tarihi boyunca başta Antik Yunan Filozofları olmak üzere öteki kavramına sayısız düşünür yaklaşım getirmektedir. Öteki kavramı felsefe, din, sosyoloji, psikoloji, antropoloji başta olmak üzere sosyal bilimlere konu olmaktadır. Araştırma boyutu bir yana dursun; öteki kavramı ötekileştirme boyutuna geçtiği an itibariyle; tavır ve anlam değiştirerek insana yakışmayan bir pencereyle ırkçılık boyutuna varabilmektedir. 20. Yüzyıla kadar bu anlam değişikliği toplumların siyasi yapıların bir parçası olarak kalmaktadır. Bu ayrımın olumsuzluğuna değinen belki de en önemli kişi Levinas olmaktadır. Irkçılık bir yana dursun; öteki kavramı, cinsel ayrımcılığa da gidebilen bir başlık olmaktadır. Yine 20. Yüzyıla kadar ayrımcılığın koyu şekliyle cinsel ayrımcılık; toplumlarda gözlenebilmektedir. Öteki kavramına değinen yerli yazarlardan biri de 20.yüzyılda farklılığıyla öne çıkan Sevim Burak olmaktadır. Sevim Burak yazın hayatına getirdiği yeni bakış açısı, imgelem gücünü ortaya koyması, anlamın yetmediği noktalarda gerek bilinç akışı tekniğiyle gerek anlamı güçlendirmek için kullandığı fotoğraf ve sembollerle dikkat çeken bir yazar olmaktadır. Sevim Burak yazdığı 3 oyun metniyle öteki kavramını bir başka boyuta taşımaktadır. Sahibinin Sesi isimli eser; bir kalp gibi ötekileştirmeyi konu edinmektedir. Söz konusu eserde Bilal Bağana isimli karakter evlilik dışı ilişki yaşadığı Zembul Allahanati başta olmak üzere bütün mahalleyi ötekileştirmektedir. Yazarın bir diğer ötekileştirmeye konu olabilecek eseri Everest My Lord olmaktadır. Everest My Lord birincil olarak amacı anlama yenilik getirmek olmasına rağmen; eserin geçtiği mekânın demokrasi kürsüsü bulunan Hyde Park olması durumuyla ötekileştirme karşısında tavır alan bir eser olmaktadır. Yazarın yazdığı bir diğer oyun metni İşte Baş, İşte Gövde, İşte Kanatlar olmaktadır. Söz konusu eser İstanbul'da Kuzguncuk semtinde geçmektedir. Burada 1940'lı yıllarda olduğu tahmin edilebilecek, iki mahalleli kadının hikayesi anlatılmaktadır. Bu eserde geçtiği semt itibariyle ötekileştirme karşıtı; kozmopolit bir yapıyı savunan bir pozisyondadır. Yazarın 3 eseri içinde tavrının, duruşunun ötekileştirme karşıtı olduğu söylenilebilir. Anahtar Kelimeler: Öteki, Özne Nesne İlişkisi, Ben Ve Başkası, Sevim Burak, Oyun İnceleme The Conception of others emerges from the humans ' nature of necessity of other people, a social member of society and humans ' creation. During history, the humankind, starting with the antique Hellenistic philosophers and countless other philosophers attribute a meaning to the conception of others. Social sciences like philosophy, sociology, psychology, anthropology, and religions become subject to the concept of others. Researching or seeking the concept of others can sometimes show as a marginalization of some parties and groups and changes its attitudes and real meaning. It evolves into discrimination of others and it is not a normal behavior. Misjudging the concept of others has remained the part of the political societies until the 20th century. Alienation of others causes problems with a society; one of the most important people took attention to this negativity that was Levinas. Racial discrimination is not just the only problem in the meantime extreme sexual discrimination has observed by the end of the 20th century. One of Turkey's native writer Sevim Burak studied conception of other in the 20th century. He brings a new perspective to his literature life, how he presents his imagination power, when the words are not enough to convey the meaning he supports this with stream-of-consciousness technique also he uses visual aids to strengthen the meaning such as photograph and symbols which makes him worth mentioning. Sevim Burak's three playbook conveys the contents of other's concept to a different point of view. One of his works `voice of owner` mentions about alienated just like a heart. The topic of this work character named Bilal Bağana is having an affair with Zembul Allahanati being in the first place he alienates her plus whole his neighborhood. Another work of his Everest My Lord's subject is the alienation of others. Although this work's prior target is to bring a new perception on the meaning, the place in the text `Hyde Park` represents `desk of democracy` in this aspect opposing the system of otherization. Sevim Burak's another playbook named, `Here it is the head, the trunk and the wings`. The playbook content takes place in Istanbul's Kuzguncuk district. This work mentions about neighborhood residents of two women's story, it indicates us narrative taking place in the years of 1940s. The story's place district of Kuzguncuk known as it the cosmopolitan structure and it objects to otherization of people. We can say that the writer's three playbooks stand against toward the alienation of others. Keywords: Other, Subject-Object Relevance, Myself and Other, Sevim Burak, Research of Playbook 108
- Published
- 2018
8. Epicardial permanent pacemaker implantation via coronary sinus in a patient with mechanical tricuspid valve prosthesis
- Author
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Demir, Tolga, Kızılırmak Yılmaz, Filiz, Tanrıkulu, Nurşen, Kılıçarslan, Fethi, Demirsoy, Ergün, and İstanbul Medipol Üniversitesi, Tıp Fakültesi, Dahili Tıp Bilimleri Bölümü, Kardiyoloji Ana Bilim Dalı
- Subjects
Permanent Pacemaker ,Kalıcı Pacemaker ,Coronary Sinus ,Mechanical Tricuspid Valve Prosthesis ,Koroner Sinüs ,Mekanik Triküspid Kapak Protezi - Abstract
Pacemaker implantation in patients with tricuspid prosthesis is a challenging situation. It is not possible to pass the pacing lead through tricuspid valve in these patients. Therefore, ventricular pacing can be achieved either epicardial or endocardial left vent- ricular stimulation. For epicardial pacing, lead implantation can be done transvenously via coronary sinus or surgically. In this paper, we present a patient who had complete atrioventricular block (CAVB) following tricuspid valve prosthesis implantation and treated with epicardial pacing via coronary sinus. In pati- ents who develop CAVB after tricuspid valve replacement, can be treated with permanent pacemaker implantation via CS. This technique enables a minimally invasive approach and effective stimulus in patients with inaccessible right ventricle because of the presence of prosthetic tricuspid valve. Triküspid protezi olan hastalarında pacemaker implantasyonu zor bir durumdur. Bu hastalarda, pacemaker elektrodunu triküspit kapaktan geçirmek olası değildir. Bu nedenle, ventriküler uyarı, ancak epikardiyal veya endokardiyal sol ventriküler stimülasyon ile elde edilebilir. Epikardiyal uyarı için, elektrodun implantas- yonu, tranasvenöz yol ile koroner sinüse veya cerrahi yöntemle yapılabilir. Bu makalede, triküspid kapak replasmanı sonrasın- da gelişen tam kalp bloğunun, koroner sinüs yoluyla epikardiyal stimülasyon elde edilerek tedavi edildiği bir hastayı sunuyoruz. Triküspid kapak replasmanı sonrası tam kalp bloğu gelişen hasta- lar koroner sinüs yolu ile implante edilen kalıcı kalp pili ile tedavi edilebilirler. Bu teknik, hem minimal invaziv bir yaklaşım hem de protez triküspid kapak nedeniyle sağ ventriküllerine erişilemeyen hastalarda etkili bir uyarı sağlar.
- Published
- 2017
9. Effects of Cilostazol on the Myocardium in an Obese Wistar Rat Model of Ischemia-Reperfusion Injury.
- Author
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Demir, Tolga, Şahin, Mazlum, Mert, Fatma Tuğba İlal, Saraç, Fatma, Balkaya, Ahmet İbrahim, and Gurbanov, Kanan
- Subjects
QUINOLONE antibacterial agents ,MYOCARDIUM ,ISCHEMIA treatment ,SUPEROXIDE dismutase ,ADENOSINE triphosphate - Abstract
Objectives: This study aims to determine the protective effect of cilostazol on myocardium in obese Wistar rats with induced ischemia-reperfusion injury (IRI). Methods: Four groups with 10 Wistar rats were included: 1] Sham Group: IRI was not established in normal weight-Wistar rats. 2] Control Group: IRI but no cilostazol in normal weight-Wistar rats. 3] Cilostazol in normal weight-Wistar rats: IRI and cilostazol was administered. 4] Cilostazol in obeseWistar rats: IRI and cilostazol was administered. Results: Tissue adenosine triphosphate (ATP) levels were significantly higher and superoxide dismutase (SOD) levels significantly lower in the control group than in the sham group and normal weight cilostazol group (p=0.024 and p=0.003). Fibrinogen levels were 198 mg/dL in the sham group, 204 mg/dL in the control group, and 187 mg/dL in the normal-weight cilostazol group (p=0.046). Additionally, plasminogen activator inhibitor-1 (PAI-1) levels were significantly higher in the control group (p=0.047). The level of ATP was significantly lower in the normal-weight cilostazol group than in the obese group (104 vs 131.2 nmol/g protein, p=0.043). PAI-1 level was 2.4 ng/mL in the normal weight cilostazol group and 3.7 ng/mL in the obese cilostazol group (p=0.029). Normal-weight Wistar rats with cilostazol had significantly better histologic outcomes than the control group and obese Wistar rats (p=0.001 and p=0.001). Conclusion: Cilostazol has a protective effect on myocardial cells in IRI models by decreasing inflammation. The protective role of cilostazol was reduced in obese Wistar rats compared with normal-weight Wistar rats. [ABSTRACT FROM AUTHOR]
- Published
- 2023
10. Effect of Radiocephalic and Brachiocephalic Arteriovenous Fistula on Cardiac Function in Hemodialysis Patient.
- Author
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Bektaş, Nilüfer, El Kılıç, HELİN, Saraç, Yasin, BALKAYA, AHMET İBRAHİM, Demir, Tolga, and Koramaz, Ismail
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ARTERIOVENOUS fistula ,HEMODIALYSIS ,CHRONIC kidney failure ,ECHOCARDIOGRAPHY - Abstract
Objectives: End-stage renal disease (ESRD) is very common and affecting almost 10% of the population worldwide. Arterio-venous fistulas (AVFs) become first access options for hemodialysis but AVFs may contribute to maladaptive cardiovascular remodelling. Methods: We studied the efect of radiocephalic AVFs (RC-AVFs) and brachiocephalic AVFs (BC-AVFs) creation on cardiac structure and function in patients with ESRD. In this study patients with listed for AVF creation underwent echocardiography before and six weeks after the surgery. The primary outcome was changes in left ventricle (LV) volumes and LV ejection fraction. The secondary outcome was determinining which type of fistula increases the likelihood of cardiovascular remodelling more. Results: Between November 2022 and March 2023, a total of 38 patients (mean age 62 years) who underwent AVFs surgery were included in the study. Out of these patients, 17 received RC-AVFs, while 21 patients received BC-AVFs. Echocardiography revealed a significant increase in left ventricular end-diastolic pressure (LVEDP) in both groups (p=0.02). The increase in LVEDP was found to be significantly higher in the BC-AVFs group compared to the RC-AVFs group (p=0.03). However, there were no significant changes observed in ejection fraction. Conclusions: AVF creation is a critical treatment method in ESRD. However, high-flow fistulas carry a substantial risk potential in patients with underlying cardiovascular diseases. To avoid an increase in left ventricular pressure (LVP), especially in BC-AVFs, it is possible to create smaller diameter artery and vein anastomoses. This approach can help minimize the risk of elevated LVP associated with AVFs. [ABSTRACT FROM AUTHOR]
- Published
- 2023
11. Bedside PDA ligation in premature infants less than 28 weeks and 1000 grams
- Author
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Avsar, Mustafa Kemal, primary, Demir, Tolga, additional, Celiksular, Cem, additional, and Zeybek, Cenap, additional
- Published
- 2016
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12. Five-year follow up of Konno aortoventriculoplasty for repeat aortic valve replacement in an adult patient : case report
- Author
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Uyar, Ibrahim, primary, Demir, Tolga, additional, Uyar, Gunseri Uysal, additional, Tulukoglu, Engin, additional, Parlar, Ali Ihsan, additional, and Isik, Omer, additional
- Published
- 2015
- Full Text
- View/download PDF
13. Crowdfunding as Gambling: Evidence from Repeated Natural Experiments
- Author
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Tolga Demir, Ali Mohammadi, Kourosh Shafi, and Demir, Tolga
- Subjects
040101 forestry ,Economics and Econometrics ,050208 finance ,Strategy and Management ,Peer-to-peer lending ,05 social sciences ,Novelty ,Advertising ,04 agricultural and veterinary sciences ,Lottery ,0502 economics and business ,Gambling ,Fin-tech ,0401 agriculture, forestry, and fisheries ,Sensation seeking ,Natural (music) ,Business ,Business and International Management ,Crowdfunding ,Finance - Abstract
Lenders in Prosper, one of the largest lending markets in the U.S., reduce their activity when playing multistate Powerball or Mega Millions lottery jackpot becomes attractive. This finding suggests that the desire for sensation seeking is an underlying motivation for participating in peer-to-peer crowdfunding markets; the thrill of winning a large lottery jackpot fulfills some lenders' desire for novelty and sensation seeking, thus decreasing their lending activity. We discuss our findings' implications for lenders, borrowers, platform organizers, and policymakers. © 2021 Elsevier B.V.
- Published
- 2022
14. The Evaluation of YouTube™ English Videos' Quality About Coronary Artery Bypass Grafting.
- Author
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Cetin HK, Koramaz I, Zengin M, and Demir T
- Abstract
Objectives: The aim of the study was to clarify the reliability and quality of English videos about Coronary artery bypass grafting on YouTubeTM., Methods: The study was performed between July 16 and July 30. A cardiovascular surgeon searched for terms including "coronary artery disease," "coronary artery treatment," "coronary artery bypass" and "coronary artery bypass surgery," in YouTubeTM. All videos were classified into two groups according to the source who uploaded the video as professional videos and non-professional videos. Video characteristics including duration of video on YouTube™, length of video, and view numbers for each video were recorded. Moreover, the numbers of "comments," "likes," and "dislikes" were noted. Furthermore, the target audience of the videos (professional health care worker and patients) was analyzed, DISCERN score and Global quality score (GQS) were calculated for each video., Results: Totally, 812 videos were divided into two groups according to upload sources; 448 videos were categorized as professional videos and 364 videos were categorized as non-professional videos. The mean number of views was 3220.5 for professional videos and 2216.5 for non-professional videos (p=0.001). In addition, the mean "like" numbers and mean comment numbers were significantly higher for professional videos (p=0.001 and p=0.001). The mean DISCERN score was 2.6 for professional videos and 1.5 for non-professional videos (p=0.001). Similarly, the mean GSQ was significantly higher for professional videos (3.5 vs. 2.5, p=0.001)., Conclusion: YouTube™ videos which are shared by professional healthcare workers have better quality and reliability with significantly higher DISCERN score and GQS., Competing Interests: None declared., (©Copyright 2023 by The Medical Bulletin of Sisli Etfal Hospital.)
- Published
- 2023
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15. The Evaluation of Cardiovascular Surgery-Associated Google Search Trends During COVID-19 Waves.
- Author
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Cetin HK, El Kilic H, Koramaz I, and Demir T
- Abstract
Objectives: The aim of the study was to clarify public interest about cardiovascular disease during the COVID-19 pandemic using Google Trends (GT)., Methods: The study was performed between November 20 and December 1, 2021. A total of 21 keywords related to cardiovascular surgery were selected. Public attention to all selected keywords was analyzed by GT with using the filters "web search," "all categories," and "Turkey." In Turkey, three COVID-19 waves (between March 12, 2020, and May 8, 2020, November 24, 2020, and January 20, 2021, and March 20, 2021, and May 16, 2021) were experienced since the beginning of the pandemic. To analyze public attention to cardiovascular surgery during the COVID-19 waves, 8-week periods during the COVID-19 waves were compared with the same times in the past 4 years (2016-2019)., Results: Comparisons of March 12-May 8 2020 and the same period between 2016 and 2019 showed that total public interest about cardiovascular surgery was significantly decreased (-28.7%, p=0.001). The comparison of the second COVID-19 wave (November 24, 2020-January 20, 2021 versus November 24-January 20, 2016-2019) revealed that public interest about cardiovascular surgery was significantly lower in the COVID-19 era (-22.2%, p=0.001). Comparison of the third COVID-19 wave and the same periods in the previous 4 years demonstrated that public interest about cardiovascular disease was significantly lower in the COVID-19 era (-8.5%, p=0.001). In contrast, the term coronary angiography was searched significantly more during the third wave of COVID-19 in comparison to the same periods between 2016 and 2019 (17.9%, p=0.015)., Conclusion: Our study demonstrated that public interest in cardiovascular diseases was significantly decreased in all waves of the COVID-19 pandemic. However, interest in only the term coronary angiography was significantly increased in the third wave of pandemic., Competing Interests: None declared., (© Copyright 2022 by The Medical Bulletin of Sisli Etfal Hospital.)
- Published
- 2022
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16. Aspergillus flavus endocarditis of the native mitral valve in a bone marrow transplant patient.
- Author
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Demir T, Ergenoglu MU, Ekinci A, Tanrikulu N, Sahin M, and Demirsoy E
- Subjects
- Adult, Antifungal Agents therapeutic use, Endocarditis, Bacterial drug therapy, Endocarditis, Bacterial etiology, Heart Valve Prosthesis adverse effects, Humans, Male, Mitral Valve surgery, Myelodysplastic Syndromes surgery, Tomography, X-Ray Computed, Aspergillus flavus isolation & purification, Bone Marrow Transplantation adverse effects, Endocarditis, Bacterial diagnosis, Heart Valve Prosthesis microbiology, Mitral Valve microbiology
- Abstract
Background: Infective endocarditis due to Aspergillus species is an uncommon infection with a high mortality rate. It mostly occurs after the implantation of prosthetic heart valves. Parenteral nutrition, immunosuppression, broad-spectrum antibiotic regimens, and illegal intravenous drug use are the risk factors for developing infection., Case Report: We report a case of Aspergillus flavus native mitral valve endocarditis in a patient who had allogeneic stem cell transplantation in the past due to myelodysplastic syndrome., Conclusions: Although it is rare and there is limited experience available with the diagnosis and treatment, early recognition and therapeutic intervention with systemic antifungal therapy and aggressive surgical intervention are critical to prevent further complications that may eventually lead to death. In addition, better novel diagnostic tools are needed to facilitate more accurate identification of patients with invasive Aspergillus and to permit earlier initiation of antifungal treatment.
- Published
- 2015
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17. Five-year follow-up of a patient with bilateral carotid body tumors after unilateral surgical resection.
- Author
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Demir T, Uyar I, Demir HB, Sahin M, and Gundogdu G
- Subjects
- Adult, Angiography, Biopsy, Carotid Body Tumor diagnosis, Female, Follow-Up Studies, Humans, Quality of Life, Time Factors, Carotid Artery, Common surgery, Carotid Body Tumor surgery, Diagnostic Imaging methods, Vascular Surgical Procedures methods
- Abstract
Background: Carotid body tumors are rare, highly vascularized neoplasms that arise from the paraganglia located at the carotid bifurcation. Surgery is the only curative treatment. However, treatment of bilateral carotid body tumors represents a special challenge due to potential neurovascular complications., Case Report: We present the therapeutic management of a 34-year-old woman with bilateral carotid body tumors. The patient underwent surgical resection of the largest tumor. It was not possible to resect the tumor without sacrificing the ipsilateral vagal nerve. Due to unilateral vagal palsy, we decide to withhold all invasive therapy and to observe contralateral tumor growth with serial imaging studies. The patient is free of disease progression 5 years later., Conclusions: Treatment of bilateral CBTs should focus on preservation of the quality of life rather than on cure of the disease. In patients with previous contralateral vagal palsies, the choice between surgery and watchful waiting is a balance between the natural potential morbidity and the predictable surgical morbidity. Therefore, to avoid bilateral cranial nerve deficits, these patients may be observed until tumor growth is determined, and, if needed, treated by radiation therapy.
- Published
- 2014
- Full Text
- View/download PDF
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