bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparative assessment of the diagnostic value of echocardiography and magnetic resonance imaging in determining myocardial viability
Authors: Kryukov N. A. , Ryzhkov A. V. , Sukhova I. V. , Anan’evskaya P. V. , Fokin V. A. , Gordeev M. L. 
Published: September 2021

Aim. To compare myocardial imaging methods in patients with complicated coronary artery disease with significantly decreased myocardial contractility.Material and methods. This single-center retrospective study included 109 patients with complicated coronary artery disease who underwent surgical treatment between 2014 and 2020. All patients had indications for delayed contrast-enhanced cardiac magnetic resonance imaging (MRI) in order to determine myocardial viability due to a pronounced decrease in left ventricular contractility according to echocardiography (ejection fraction (EF) ≤30%).Results. Impairment of local contractility according to MRI and echocardiography significantly correlates with depth of contrast accumulation (p=0,0000000018 and p=0,0000034, respectively). Delayed contrast-enhanced cardiac MRI with cine sequences allows to determine higher number of impaired contractility cases compared with echocardiography (p=0,000006).Conclusion. MRI with cine sequence allowed to determine higher number of impaired contractility cases compared with echocardiography. Delayed contrastenhanced MRI is a reliably more sensitive method than electrocardiography in detecting left ventricular scarring. The depth of contrast agent accumulation correlates with local contractility impairment detected by echocardiography and delayed contrast-enhanced cardiac MRI.
Risk assessment of contrast-induced acute kidney injury in patients with acute myocardial infarction after coronary angiography and percutaneous coronary intervention
Authors: Ursta A. A. , Kharkov E. I. , Petrova M. M. , Kotikov A. R. , Ursta O. V. 
Published: September 2021

Aim. To assess the risk of contrast-induced acute renal injury (CI-AKI) in patients with acute myocardial infarction in a highly specialized hospital after coronary angiography.Material and methods. The study sample included 502 patients who were treated in the cardiology department of a specialized hospital. CI-AKI was established by an increase in creatinine >26 μmol/L within 48 hours after percutaneous coronary intervention (PCI) with radiopaque contrast agents or an increase in creatinine >50% within a week after PCI. A multistage statistical analysis was used to search for possible predictors of CI-AKI.Results. In total, CI-AKI was diagnosed in 57 (11,3%) patients. Based on the analysis performed, 3 significant predictors of CI-AKI were identified: patient’s age, contrast medium volume (ml/kg) and anemia (presence/absence). An equation for assessing the risk of CI-AKI in patients after PCI has been created.Conclusion. A simple scale for assessing the CI-AKI risk makes it possible to identify a category of patients who requires preventive measures to reduce iatrogenic complications and mortality.
Calcification markers and long-term outcomes of coronary artery bypass grafting
Authors: Stakhneva E. M. , Kashtanova E. V. , Kurguzov A. V. , Maslatsov N. A. , Polonskaya Ya. V. , Murashov I. S. , Chernyavsky A. M. , Ragino Yu. I. 
Published: September 2021

Aim. To assess the long-term outcomes of coronary artery bypass grafting (CABG) and their association with calcification biomarkers.Material and methods. The study included 129 men (mean age, 61,5±7,5 years) with coronary atherosclerosis who were admitted for CABG surgery. Patients were divided into 2 groups: with favorable and unfavorable (death, myocardial infarction, stroke, surgery) 5-year prognosis after surgery. Before the surgery, the blood concentrations of calcification biomarkers (osteoprotegerin, osteopontin, osteonectin and osteocalcin) were determined in all patients.Results. Long-term outcomes of myocardial revascularization were studied in 92 patients (71%). An unfavorable long-term 5-year period was identified in 28 men (30,4%). In men with an unfavorable 5-year prognosis, the blood osteocalcin level before CABG was 1,2 times higher than in men with a favorable one. Multivariate linear regression showed that the risk of a 5-year unfavorable prognosis for coronary atherosclerosis after myocardial revascularization was associated with the blood osteocalcin concentration, determined before CABG (B=0,018, R2=0,285, p=0,008).Conclusion. The data obtained indicate the relevance of continuing studies on osteocalcin, including with respect to its contribution to coronary atherosclerosis and calcification.
Comparative efficacy of medication and cardiac resynchronization therapy in patients with heart failure with reduced ejection fraction
Authors: Eyyubova U. A. 
Published: September 2021

Aim. To compare the effectiveness of standard conservative therapy for heart failure (HF) with the inclusion of sacubitril/valsartan combination and device therapy.Material and methods. The study included 64 patients from 38 to 73 years old (45 men and 19 women; mean age, 59,5±0,9 years) hospitalized in Baku (Azerbaijan) hospital due to NYHA class II-IV HF. The patients were divided into the experimental (group 1) and control (group 2) groups. The experimental group included 33 patients who took sacubitril/valsartan twice a day in combination with other drugs for standard HF therapy. The control group included 31 patients after cardiac resynchronization therapy. We compared clinical and hemodynamic parameters (including 6-minute walk test and echocardiography data) before and 6 months after treatment, as well as blood concentration of brain natriuretic peptide (BNP). In addition, Kaplan-Meier survival curves were analyzed.Results. As a result of 6-month therapy, clinical condition of patients in both groups was improved. In the experimental group, some parameters were significantly better than in the control one. So, the differences regarded distance in 6-minute walk test (pu=0,002), changes in HF class (pu=0,017), LV ESD (pu=0,006), LV EDD (pu=0,001) and blood BNP concentrations (pu<0,001).Conclusion. The use of sacubitril/valsartan combination as part of standard HF therapy was accompanied by a significant improvement in the clinical, hemodynamic and biochemical parameters of patients with HF compared with device therapy.
Comparative analysis of hemodynamic characteristics of the biological xenogenic pericardial prosthesis MEDINGE-BIO with “easy change” system and the xenogenic aortic prosthesis Hancock II after aortic valve replacement
Authors: Petlin K. A. , Kosovskikh E. A. , Lelik E. V. , Kozlov B. N. 
Published: September 2021

Aim. To compare the outcomes of aortic valve replacement using the xenogenic aortic prosthesis Hancock II and the novel Russian xenogenic pericardial prosthesis MEDINGE-BIO.Material and methods. The study included patients operated on for aortic stenosis in the cardiac surgery department № 1 of the Cardiology Research Institute (Tomsk National Research Medical Center). All patients were divided into two groups. The first group included 54 patients with Hancock II prostheses, the second — 91 patients with MEDINGE-BIO prostheses. Hemodynamic characteristics of heart valves were assessed by echocardiography before surgery and before discharge (on average 10 days after surgery).Results. When comparing hemodynamic parameters before and after surgery, significant differences between the groups were not obtained. The average pressure gradient after surgery using Hancock II and MEDINGE-BIO prosthesis was 21,6±7,9 and 17,9±5,6 mm Hg, respectively (p=0,05).Conclusion. The comparative analysis showed that the novel biological prosthesis MEDINGE-BIO has comparable hemodynamic characteristics with the well-known aortic prosthesis Hancock II.
Cardiac tumors: analysis of surgical treatment
Authors: Sakovich V. A. , Drobot D. B. , Chernova A. A. , Gorbunov D. N. , Buyankov D. I. , Gross Yu. V. , Verkhoturov M. K. , Stavtseva M. A. 
Published: September 2021

Aim. To analyze the preoperative status, intraoperative tumor characteristics and further clinical manifestations in patients after surgery for a cardiac tumor.Material and methods. The study included 54 patients who were operated on for a heart tumor from 2014 to 2020. We assessed clinical performance, diagnostic investigations before and after (during hospitalization) surgery, tumor size and histological characteristics.Results. Among patients operated on for cardiac tumors, women predominated (74%). Among comorbidities, hypertension (79,3%), chronic kidney disease (48,3%), and obesity (25,9%) were most common. There were following clinical manifestations before surgery: shortness of breath — 47 (81%) patients, palpitations and heart rhythm disturbance — 26 (44,8%), chest pain — 25 (43,1%), chest discomfort — 28 (49,1%), edema — 6 patients (10,3%). The predominant tumor localization was the left atrial fossa ovalis area (50%). According to histological analysis, myxoma prevailed — 38 cases (86,4%). After surgery, atrial fibrillation prevalence decreased from 8 patients before surgery to 6 after surgery (p=0,034), while left atrial size decreased by 0,6 mm (95% confidence interval, 4,39-6,2 mm) (p<0,001).Conclusion. According to presented analysis over a 6-year period, cardiac neoplasms are more common in women (74,1%), while the mean age of patients is 59,7 years. Among comorbidities, hypertension prevails — 79,3%. Histological examination revealed a predominance of myxoma (86,4%). Predominant tumor location was the left atrial fossa ovalis area (50%). Surgical treatment of neoplasms was effective. So, prevalence of atrial fibrillation decreased by 25%, while left atrial size decreased by 0,6 mm. Postoperative complications and in-hospital deaths were not registered.
documentação de saberes aplicados biodiversidade e a Biblioteca Digital do Cerrado (BDC)
Authors: Duarte Tavares Maria de Fátima 
Published: September 2021

O acesso s informações sobre a biodiversidade brasileira tem sido intensificado nos últimos anos por ações públicas que têm promovido a informatização de acervos cientí­ficos, pela integração de bancos de dados de diversas instituições do paí­s em sistemas internacionais e pela maior disponibilização de conhecimento produzido nas instituições brasileiras a partir da agregação de conteúdo cientí­fico em repositórios digitais. Este estudo de caso enfoca a análise da visibilidade e visualidade do Cerrado neste quadro informacional emergente em paralelo proposição da Biblioteca Digital do Cerrado (BDC), em DSpace. A BDC, como instrumento local de gestão da informação ambiental, visa a valorização, sistematização e acesso facilitado a conteúdos documentais digitais. Esse serviço prioriza o desenvolvimento de coleções de registros visuais, decorrentes das atividades de pesquisa e monitoramento de áreas protegidas. A relação entre a visibilidade do Cerrado e a visualidade em infraestruturas de informação voltadas para o conteúdo cientí­fico é historicamente considerada nos quadros temporais que determinam a ocupação do bioma.
Pengembangan Buku Cerita Rakyat Berbahasa Jawa untuk Siswa SD Kelas IV Berkultur Madura
Authors: Kodir Nuril Hidayatul , Arafik Muh , Taufiq Achmad 
Published: September 2021

Abstract: The purpose of this research and development produce book Javanese folklore for student with Madura culture, the criteria is valid and practical according to (1) specialist subject matter, (2) spesialist product, (3) specialist learning and (4) small group product trials and (5) large group trials. The model used is an adaptation of Sugiyono,s research and development. Validation subject matter done with a lecturer literatur Indonesia, validation product design done with lecturer KSDP and lecturer TEP, validation specialist learning done with a IV grade teacher SD Negeri Kotalama 1 Malang. Small group product trials done with 12 students, and large group trials done with 25 IV grade students SD Negeri Kotalama 1 Malang. Overall average validation results are 94,55 percent, small group product trials result 99,16 percent and large group trials result 98,4 percent. Based on that research and development book Javanese folklore for students with Madura culture which is considered very valid and very practical.
Abstrak: Tujuan penelitian dan pengembangan ini adalah menghasilkan media buku cerita rakyat Madura berbahasa jawa yang valid dan praktis menurut (1) ahli materi, (2) ahli media, (3) ahli pembelajaran, (4) uji coba kelompok kecil, dan (5) uji coba kelompok besar. Model yang digunakan merupakan adaptasi dari model penelitian dan pengembangan sugiyono. Validasi materi dilakukan oleh 1 orang dosen sastra Indonesia, validasi media dilakukan oleh 1 orang dosen KSDP dan 1 orang dosen TEP, serta validasi pembelajaran dilakukan oleh guru kelas IV SD Negeri Kotalama 1 Malang. Uji coba kelompok kecil dilakukan pada 12 siswa dan uji coba kelompok besar dilakukan pada 25 siswa kelas IV SD Negeri Kotalama 1 Malang. Keseluruhan rata-rata hasil uji validasi dengan persentase sebesar 94,55 persen, hasil uji coba kelompok kecil dengan persentase 99,16 persen dan uji kelompok besar dengan persentase 98,4 persen. Berdasarkan hal tersebut, maka media buku cerita rakyat Madura berbahasa jawa yang dikembangkan termasuk kriteria sangat valid dan sangat praktis.
Pengaruh Kecerdasan Emosional terhadap Prestasi Belajar Siswa Kelas IV SD Selama Pembelajaran Daring
Authors: Maghfiroh Wasiul , Mahanani Putri , Nihayati Nihayati 
Published: September 2021

Abstract: This research was conducted with the aim of knowing whether there is a positive and significant effect of emotional intelligence on the learning achievement of fourth grade elementary school students in cluster 4 of Blimbing sub-district during online learning. This research uses a quantitative approach, with an associative type. Based on the results of simple linear regression analysis, the equation Y is 51.912 + 0.364X is obtained, it can be seen that the consistent value of variable Y is 51.912, while the regression coefficient for variable X is 1.339. The regression coefficient X is positive, so it can be said that the effect of variable X on variable Y has a positive direction of influence. Based on the probability value obtained, which is 0.000 less than 0.05, it shows that variable X has an effect on variable Y. At the t value, it is known that tcount 4.815 greater than ttable 1.657, which means that the regression coefficient is significant. That way, it can be concluded that there is a positive and significant effect of emotional intelligence on the learning achievement of fourth grade elementary school students in cluster 4 of Blimbing sub-district during online learning.
Abstrak: Penelitian ini dilakukan dengan tujuan untuk mengetahui ada tidaknya pengaruh positif dan signifikan kecerdasan emosional terhadap prestasi belajar siswa kelas IV SD se-gugus 4 kecamatan Blimbing selama pembelajaran daring. Penelitian ini menggunakan pendekatan kuantitatif, dengan jenis asosiatif. Berdasarkan hasil analisis regresi linear sederhana, diperoleh persamaan Y sama dengan 51,912 + 0,364X, dapat diketahui nilai konsisten variabel Y sebesar 51,912, sedangkan koefisien regresi variabel X sebesar 1,339. Koefisien regresi X bernilai positif, sehingga dapat dikatakan bahwa pengaruh dari variabel X terhadap variabel Y memiliki arah pengaruh yang positif. Berdasarkan nilai probabilitas yang didapatkan yakni 0,000 kurang dari 0,05, menunjukkan bahwa variabel X berpengaruh terhadap variabel Y. Pada nilai t, diketahui thitung 4,815 lebih dari ttabel 1,657, yang berarti koefisien regresi dinyatakan signifikan. Dengan begitu, dapat diperoleh kesimpulan bahwa ada pengaruh positif dan signifikan kecerdasan emosional terhadap prestasi belajar siswa kelas IV SD se-gugus 4 kecamatan Blimbing selama pembelajaran daring.
Keefektifan Media Video terhadap Minat dan Hasil Belajar Matematika Kelas III SD
Authors: Cholida Diah Meyta Nur , Roebyanto Goenawan , Ahdhianto Erif 
Published: September 2021

Abstract: This study aims to find out about the effectiveness of video media on the interests and results of learning mathematics. This research was only conducted in grade III A of SDN Bumiayu 2. There are two variables studied, namely students' interest and learning outcomes in mathematics subjects. This study uses a type of Pre-Experimental research using One Group Pretest-Posttest Design. A sample of 27 students was designated as experimental classes. The results of the study showed that there are differences before being treated and after being treated in the form of learning video media. This is seen by the Paired Sample T Test with a significance value of 0.000 less than 0.05. In the test of effectiveness by using the test N-Gain Score on learning interests is 0.683, while in the study results are worth 0.42. From the data, there is an effectiveness and video media to the interests and learning outcomes of grade III students at SDN Bumiayu 2 in the moderate category.
Abstrak: Penelitian ini bertujuan untuk mengetahui mengenai keefektifan media video terhadap minat dan hasil belajar matematika. Penelitian ini hanya dilakukan di kelas III A SDN Bumiayu 2. Terdapat dua variabel yang diteliti yaitu minat dan hasil belajar siswa pada mata pelajaran matematika. penelitian ini menggunakan jenis penelitian Pre-Experimental dengan menggunakan One Group Pretest-Posttest Design. Jumlah sampel sebanyak 27 siswa yang ditetapkan sebagai kelas eksperimen. Pada hasil penelitian menunjukkan bahwa terdapat perbedaan sebelum diberi perlakuan dan sesudah diberi perlakuan berupa media video pembelajaran. Hal ini dilihat dengan uji Paired Sample T Test dengan nilai signifikansi 0,000 kurang dari 0,05. Pada uji keefektifan dengan menggunakan uji N-Gain Score pada minat belajar yakni 0,683, sedangkan pada hasil belajar bernilai 0,42. Dari data tersebut maka terdapat keefektifan media video terhadap minat dan hasil belajar siswa kelas III SDN Bumiayu 2 dalam kategori sedang.
Analisis Minat Belajar Siswa dalam Penggunaan Aplikasi Belajar Quizizz pada Pembelajaran Tematik Kelas III Sekolah Dasar
Authors: Yulistiarawati Dewi Nur , Umayaroh Siti , Linguistika Yulia 
Published: September 2021

Abstract: The purpose of this study was to describe the learning interest of class III B students at SDN Bumiayu 3 Malang City when learning without using the Quizizz learning application and to describe the learning interests of class III B students at SDN Bumiayu 3 Malang City when learning using the Quizizz learning application. The approach used is a mix method (combination research) with the type of research using descriptive research and the design method used is the parallel combined method design. Data were collected using a questionnaire (questionnaire), interviews and documentation. The results of the study showed that students' interest in learning without using the Quizizz learning application was categorized as moderate with a percentage of 63 percent. Then for students' interest in learning using the Quizizz learning application, the percentage of 83 percent is in the high category. There is an increase in interest in learning, namely 20 percent, so it can be concluded that the Quizizz learning application can be an alternative for teachers in using learning media during online learning during a pandemic to increase students' interest in learning, as well as create a more interesting, fun, not monotonous learning atmosphere for learning. followed by students, and utilize technology.
Abstrak: Tujuan penelitian ini adalah mendeskripsikan minat belajar peserta didik kelas III B SDN Bumiayu 3 Kota Malang ketika pembelajaran tanpa menggunakan aplikasi belajar Quizizz dan mendeskripsikan minat belajar peserta didik kelas III B SDN Bumiayu 3 Kota Malang ketika pembelajaran menggunakan aplikasi belajar Quizizz. Pendekatan yang digunakan yaitu mix method (penelitian kombinasi) dengan jenis penelitian menggunakan penelitian deskriptif dan desain metode yang digunakan yaitu desain metode gabungan paralel. Data dikumpulkan menggunakan kuesioner (angket), wawancara, dan dokumentasi. Hasil dari penelitian menunjukkan bahwa minat belajar peserta didik tanpa menggunakan aplikasi belajar Quizizz dikategorikan sedang dengan persentase 63 persen. Kemudian untuk minat belajar peserta didik menggunakan aplikasi belajar Quizizz menunjukkan persentase 83 persen yang termasuk kategori tinggi. Terdapat peningkatan minat belajar yaitu 20 persen, sehingga dapat disimpulkan bahwa aplikasi belajar Quizizz dapat menjadi alternatif guru dalam menggunakan media pembelajaran selama pembelajaran dalam jaringan di masa pandemi guna meningkatkan minat belajar peserta didik, serta menciptakan suasana pembelajaran yang lebih menarik, menyenangkan, tidak monoton untuk diikuti peserta didik, dan memanfaatkan teknologi.
ANALISIS PENGARUH TIPE INTERNAL SHADING SEBAGAI STRATEGI PENDINGINAN PASIF PADA BANGUNAN
Authors: Dewi Cynthia Permata 
Published: September 2021

Abstrak: Strategi pendinginan pasif pada bangunan menjadi salah satu alternatif dalam memperoleh kenyamanan termal dengan meminimalkan konsumsi energi pendinginan bangunan. Posisi Indonesia yang dilewati oleh garis khatulistiwa mengakibatkan terjadinya penyinaran matahari sepanjang tahun. Hal ini memerlukan sebuah perlakuan khusus terhadap bukaan pada fasad bangunan. Penelitian ini bertujuan untuk menganalisis dan melihat pengaruh tipe internal shading pada interior bangunan terhadap variabel solar gain bangunan. penggunaan tipe shading berupa venetian blind, roller shades dan drapes akan diaplikasikan pada bangunan. hasil dari penelitian ini didapatkan bahwa penggunaan roller shades mampu menurunkan level solar gain sebesar 55 persen. Sedangkan penggunaan venetian blinds dan drapes memberikan hasil penurunan sebesar 31 persen dan 25 persen. Dari penelitian ini dapat disimpulkan bahwa penggunaan roller shades memberikan hasil yang cukup efektif dalam menurunkan solar gain pada bangunan.Kata-kata kunci: pendinginan pasif, internal shading, solar gainAbstract: Passive cooling strategy in buildings is an alternative in obtaining thermal comfort by minimizing building cooling energy consumption. The position of Indonesia, which is crossed by the equator, results in solar radiation throughout the year. This requires a special treatment of openings in the facade of the building. This study aims to analyze and see the effect of the type of internal shading on the interior of the building on the variable solar gain of the building. the use of shading types in the form of venetian blinds, roller shades and drapes will be applied to the building. the results of this study found that the use of roller shades was able to reduce the level of solar gain by 55 percent. Meanwhile, the use of venetian blinds and drapes resulted in a decrease of 31 percent and 25 percent, respectively. From this research, it can be concluded that the use of roller shades gives quite effective results in reducing solar gain in buildings.Keywords: passive cooling, internal shading, solar gain