cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.14281952.v1
title: Retrosternal Deformations after Coronary Artery Bypass Surgery Using Statistical Shape Analysis

description: Abstract Introduction: In this study, we aimed to evaluate the anatomical deformations of the major vascular structures in the retrosternal area caused by adhesions following coronary artery bypass grafting (CABG). Methods: This single-center, retrospective study included a total of 40 patients with a previous CABG who were admitted to our emergency unit for any reason and underwent a contrast-enhanced chest computed tomography (patient group) and 40 patients without previous cardiac surgery (control group) between January 2018 and November 2019. The retrosternal area was compared between the groups using the statistical shape analysis method. The distance between the sternum and the ascending aorta and pulmonary artery was measured and anatomical deformations of the retrosternal area were examined. Results: There was a statistically significant difference in the anatomical structures of the retrosternal area between the patient and control groups (P&lt;0.001). The distance from the midsternal line to the highest point of the pulmonary artery was statistically significantly shorter in the patient group, compared to the control group (P=0.013). The distance from the sternum to the ascending aorta was also shorter in the patient group, although it did not reach statistical significance (P&gt;0.05). Conclusions: Our study results showed narrowing of the retrosternal area following CABG and a shorter distance from the sternum to the pulmonary artery than the ascending aorta. Based on these findings, surgeons should be cautious about possible injuries in patients requiring cardiac surgery with repeated median sternotomy.
DOI: 10.6084/m9.figshare.14281949.v1
title: Surgical Treatment of Pseudoaneurysm of the Ascending Aorta in a Patient with Sepsis

description: Abstract Pseudoaneurysm of the ascending aorta (PAA) is a hazardous and potentially fatal cardiovascular disease. This condition is caused by the rupture of at least one layer of the vessel and contained by the remaining vascular layers or the surrounding mediastinal structures. We presented the surgical treatment of a patient with sepsis and large PAA and brachiocephalic trunk, which was compressing the brachiocephalic trunk leading to syncope.
DOI: 10.6084/m9.figshare.14281958
title: Management of Acute Type A Aortic Dissection at a Public Cardiac Center in the Northeast Region of Brazil

description: Abstract Introduction: Aortic diseases are among the most serious cardiovascular diseases; the overall mortality rate due to diseases such as aneurysms and aortic dissections has been estimated at 2.78 per 100,000 persons in 2010, with a higher mortality rate in men than women. Our objective was to evaluate the epidemiological profile of patients with acute type A aortic dissection at a cardiology referral center. Methods: A retrospective cross-sectional study was performed at a public cardiac center with 24 patients hospitalized from 1/1/2016 to 12/31/2017 with a confirmed diagnosis of acute type A aortic dissection. Results: Twenty (83.3%) out of 24 patients underwent surgery and four (16.7%) did not undergo surgery. Among those who underwent surgery, 10 (50%) died and 10 (50%) were discharged, and all non-operated patients died (P=0.114) (Fisher's exact test). The male gender predominated (n=19, 79.2%), 86.7% (n=13) of the patients presented body mass index &gt; 25 kg/m2, chest pain was found in 91.7% (n=22), and renal failure was present in 45.8% (n=11) of the cases. Hypertension predominated in 91.7% (n=22) and the main exam was aortic angiotomography in 79.2% (n=19) of the cases. Conclusion: The study presented a small sample size, making it impossible to associate the factors, although the service was considered a high-volume referral center. It is possible that the delay in arriving at the service and the accomplishment of invasive imaging with the use of contrast agents have aggravated the patients’ condition and have been decisive for the increase in lethality, which requires further studies.
DOI: 10.6084/m9.figshare.14281957
title: The Role of the Axillary Artery as a Second Access Choice in TAVI Procedures

description: Abstract With transcatheter aortic valve implantation (TAVI) technology expanding its indications for low-risk patients, the number of TAVI-eligible patients will globally grow, requiring a better understanding about the second-best access choice. Regarding the potential access sites, the transfemoral retrograde route is recognized as the standard approach and first choice according to current guidelines. However, this approach is not suitable in up to 10-15% of patients, for whom an alternative non-femoral access is required. Among the alternative non-femoral routes, the transaxillary approach has received increasing recognition due to its proximity and relatively straight course from the axillary artery to the aortic annulus, which provides a more accurate device deployment. Here we discuss some particular aspects of the transaxillary access, either percutaneously performed or by cutdown dissection.
DOI: 10.6084/m9.figshare.14281958.v1
title: Management of Acute Type A Aortic Dissection at a Public Cardiac Center in the Northeast Region of Brazil

description: Abstract Introduction: Aortic diseases are among the most serious cardiovascular diseases; the overall mortality rate due to diseases such as aneurysms and aortic dissections has been estimated at 2.78 per 100,000 persons in 2010, with a higher mortality rate in men than women. Our objective was to evaluate the epidemiological profile of patients with acute type A aortic dissection at a cardiology referral center. Methods: A retrospective cross-sectional study was performed at a public cardiac center with 24 patients hospitalized from 1/1/2016 to 12/31/2017 with a confirmed diagnosis of acute type A aortic dissection. Results: Twenty (83.3%) out of 24 patients underwent surgery and four (16.7%) did not undergo surgery. Among those who underwent surgery, 10 (50%) died and 10 (50%) were discharged, and all non-operated patients died (P=0.114) (Fisher's exact test). The male gender predominated (n=19, 79.2%), 86.7% (n=13) of the patients presented body mass index &gt; 25 kg/m2, chest pain was found in 91.7% (n=22), and renal failure was present in 45.8% (n=11) of the cases. Hypertension predominated in 91.7% (n=22) and the main exam was aortic angiotomography in 79.2% (n=19) of the cases. Conclusion: The study presented a small sample size, making it impossible to associate the factors, although the service was considered a high-volume referral center. It is possible that the delay in arriving at the service and the accomplishment of invasive imaging with the use of contrast agents have aggravated the patients’ condition and have been decisive for the increase in lethality, which requires further studies.
DOI: 10.6084/m9.figshare.14281957.v1
title: The Role of the Axillary Artery as a Second Access Choice in TAVI Procedures

description: Abstract With transcatheter aortic valve implantation (TAVI) technology expanding its indications for low-risk patients, the number of TAVI-eligible patients will globally grow, requiring a better understanding about the second-best access choice. Regarding the potential access sites, the transfemoral retrograde route is recognized as the standard approach and first choice according to current guidelines. However, this approach is not suitable in up to 10-15% of patients, for whom an alternative non-femoral access is required. Among the alternative non-femoral routes, the transaxillary approach has received increasing recognition due to its proximity and relatively straight course from the axillary artery to the aortic annulus, which provides a more accurate device deployment. Here we discuss some particular aspects of the transaxillary access, either percutaneously performed or by cutdown dissection.
DOI: 10.6084/m9.figshare.14281960
title: Comparing Different Methods for Estimating Hourly Solar Ultraviolet Radiation: Empirical Models, Artificial Neural Network and Support Vector Machine

description: Abstract In the present paper, the comparison of three of the main estimation methods of solar radiation was performed: empirical models, Artificial Neural Network (ANN) and Support Vector Machine (SVM). Four classical empirical models were calibrated and validated in order to estimate hourly solar UV data in Botucatu, São Paulo State, Brazil. Taken the empirical models as reference of accuracy and set for input variables, the performance of ANN and SVM were assessed. Through the statistical parameters Mean Bias Error (MBE) and Mean Absolute Error (MAE) was confirmed the superiority of the SVM over the ANN and empirical models. The SVM is capable to generate better results than ANN using a less number of input variables. Among all estimation methods, SVM using the set of input variables {UV0, KT} is considered the best alternative due to the smaller number of input variables and relative precision.
DOI: 10.6084/m9.figshare.14281960.v1
title: Comparing Different Methods for Estimating Hourly Solar Ultraviolet Radiation: Empirical Models, Artificial Neural Network and Support Vector Machine

description: Abstract In the present paper, the comparison of three of the main estimation methods of solar radiation was performed: empirical models, Artificial Neural Network (ANN) and Support Vector Machine (SVM). Four classical empirical models were calibrated and validated in order to estimate hourly solar UV data in Botucatu, São Paulo State, Brazil. Taken the empirical models as reference of accuracy and set for input variables, the performance of ANN and SVM were assessed. Through the statistical parameters Mean Bias Error (MBE) and Mean Absolute Error (MAE) was confirmed the superiority of the SVM over the ANN and empirical models. The SVM is capable to generate better results than ANN using a less number of input variables. Among all estimation methods, SVM using the set of input variables {UV0, KT} is considered the best alternative due to the smaller number of input variables and relative precision.
DOI: 10.6084/m9.figshare.14281961
title: Vegetative Development of Cesalpinea ferrea and Anadenanthera macrocarpa: I: Estimated of Cardinal Temperatures

description: Abstract The air temperature influences the vegetative development and the seedling phase duration in the forest species, since it regulates the photosynthesis reactions, because that is considered the main meteorological variable. The aim of this work was to estimate cardinal temperatures (base, optimum and maximum), which determines the thresholds on the development phases, and to estimate the phyllochron of two forest species in the seedling phase. A field experiment was carried out in a completely randomized design, in a 2X12 factorial arrangement, with two Brazilian forest species (Caesalpinia ferrea Mart. ex. Tul. Var. leiostachya Benth e angico-vermelho - Anadenanthera macrocarpa (Benth) Brenan), 12 sowing dates and five replicates. The cardinal temperatures for pau-ferro were: 12.8 °C, 20.7 °C and 46.3 °C and for angico-vermelho were: 10.3 °C, 23 °C and 45.5 °C. The phyllochron was 56.9 °C day per leaf for pau-ferro and was 163.8 °C day per leaf for angico-vermelho, which indicates that angico-vermelho requires more energy accumulation to promote the vegetative development than pau-ferro.
DOI: 10.6084/m9.figshare.14281961.v1
title: Vegetative Development of Cesalpinea ferrea and Anadenanthera macrocarpa: I: Estimated of Cardinal Temperatures

description: Abstract The air temperature influences the vegetative development and the seedling phase duration in the forest species, since it regulates the photosynthesis reactions, because that is considered the main meteorological variable. The aim of this work was to estimate cardinal temperatures (base, optimum and maximum), which determines the thresholds on the development phases, and to estimate the phyllochron of two forest species in the seedling phase. A field experiment was carried out in a completely randomized design, in a 2X12 factorial arrangement, with two Brazilian forest species (Caesalpinia ferrea Mart. ex. Tul. Var. leiostachya Benth e angico-vermelho - Anadenanthera macrocarpa (Benth) Brenan), 12 sowing dates and five replicates. The cardinal temperatures for pau-ferro were: 12.8 °C, 20.7 °C and 46.3 °C and for angico-vermelho were: 10.3 °C, 23 °C and 45.5 °C. The phyllochron was 56.9 °C day per leaf for pau-ferro and was 163.8 °C day per leaf for angico-vermelho, which indicates that angico-vermelho requires more energy accumulation to promote the vegetative development than pau-ferro.
DOI: 10.6084/m9.figshare.14281963
title: Gas Exchange of Cowpea Cultivated in Norteast of Pará in Response to Imposed Water Deficit During Reproductive Phase

description: Abstract Cowpea (Vigna unguiculata (L.) Walp.) is a cultivated legume in the North and Northeast of Brazil, but in Pará, the crop has low productivity, due to the low soil fertility and climatic adversity, mainly water deficiency. The objective of this work was to evaluate the effect of different levels of cumulative water deficit during reproductive stage on gas exchange of the cowpea. The experiment was conducted in Castanhal / Pa, in the years of 2015 and 2016 in a randomized complete block design, with six replicates and four treatments correpondent to 100% replacement of the water lost by the evapotranspiration of the crop (T1), to 50% of replacement (T2), to 25% of replacement (T3) and without irrigation (T4). Gas Exchange were determined in the phenological stage R9, correspondente to 64 days after sowing (28 dais after the begining of treatments). Water deficit was obtained by daily soil water balance according to the available water capacity and the size of the effective root system, observed at field. There was not significant difference between experimental years besides the effect of treatments. Cowpea show to be sensitive to the cumulated water déficit, decreasing its stomatal conductance and phtosyntesis rate, which differed significantly among the four treatments. For leaf water potential and internal carbono there was significant difference only between the extreme treatment. Such behavior suggest that cowpea preserve leaf water potential even under cumulative conditions of water deficit acting as a conservative specie by priorizing the maintenance of its water status rather than its photossynthetic activity. The lowest yields occurred in response to the water déficit imposed by the treatments with smaller irrigation blade.
DOI: 10.6084/m9.figshare.14281963.v1
title: Gas Exchange of Cowpea Cultivated in Norteast of Pará in Response to Imposed Water Deficit During Reproductive Phase

description: Abstract Cowpea (Vigna unguiculata (L.) Walp.) is a cultivated legume in the North and Northeast of Brazil, but in Pará, the crop has low productivity, due to the low soil fertility and climatic adversity, mainly water deficiency. The objective of this work was to evaluate the effect of different levels of cumulative water deficit during reproductive stage on gas exchange of the cowpea. The experiment was conducted in Castanhal / Pa, in the years of 2015 and 2016 in a randomized complete block design, with six replicates and four treatments correpondent to 100% replacement of the water lost by the evapotranspiration of the crop (T1), to 50% of replacement (T2), to 25% of replacement (T3) and without irrigation (T4). Gas Exchange were determined in the phenological stage R9, correspondente to 64 days after sowing (28 dais after the begining of treatments). Water deficit was obtained by daily soil water balance according to the available water capacity and the size of the effective root system, observed at field. There was not significant difference between experimental years besides the effect of treatments. Cowpea show to be sensitive to the cumulated water déficit, decreasing its stomatal conductance and phtosyntesis rate, which differed significantly among the four treatments. For leaf water potential and internal carbono there was significant difference only between the extreme treatment. Such behavior suggest that cowpea preserve leaf water potential even under cumulative conditions of water deficit acting as a conservative specie by priorizing the maintenance of its water status rather than its photossynthetic activity. The lowest yields occurred in response to the water déficit imposed by the treatments with smaller irrigation blade.
DOI: 10.6084/m9.figshare.14281966
title: Blood mRNA Expression Profiles of Autophagy, Apoptosis, and Hypoxia Markers on Blood Cardioplegia and Custodiol Cardioplegia Groups

description: Abstract Introduction: Blood cardioplegia (BC) and Custodiol cardioplegia (CC) have been used for a long time in open heart surgery and are highly effective solutions. The most controversial issue among these two is whether there is any difference between them regarding myocardial damage after ischemia surgery. In this study, autophagy, apoptosis, and hypoxia markers were investigated and that way we evaluated the differences between BC and CC patients. Methods: A total of 30 patients were included in this study, using two different cardioplegic solutions. Three different whole blood samples of the patients were taken from a central vein (preoperatively, immediately postoperatively, and one day after surgery). Total ribonucleic acid was extracted from these samples. Quantitative real-time polymerase chain reaction was performed, and changes in gene expression were determined by the 2-∆∆Ct method of relative quantification. Results: In the CC group, Beclin gene expression level was found to be higher and this difference was statistically significant (P=0.0024). Similarly, cysteine-aspartic acid protease (caspase) 9 and hypoxia-inducible factor 1α messenger ribonucleic acid (mRNA) gene expression level increased and were significantly different in the CC group. In the BC group, Beclin and microtubule-associated protein light chain 3 expressions were higher in the samples taken one day after surgery. Caspases 3 and 8 gene expressions were significantly different in the BC group. Conclusion: As a result of the analysis performed between the two cardioplegia groups, it has been shown that CC harms the myocardium more than BC at the level of mRNA expression of related markers.
DOI: 10.6084/m9.figshare.14281966.v1
title: Blood mRNA Expression Profiles of Autophagy, Apoptosis, and Hypoxia Markers on Blood Cardioplegia and Custodiol Cardioplegia Groups

description: Abstract Introduction: Blood cardioplegia (BC) and Custodiol cardioplegia (CC) have been used for a long time in open heart surgery and are highly effective solutions. The most controversial issue among these two is whether there is any difference between them regarding myocardial damage after ischemia surgery. In this study, autophagy, apoptosis, and hypoxia markers were investigated and that way we evaluated the differences between BC and CC patients. Methods: A total of 30 patients were included in this study, using two different cardioplegic solutions. Three different whole blood samples of the patients were taken from a central vein (preoperatively, immediately postoperatively, and one day after surgery). Total ribonucleic acid was extracted from these samples. Quantitative real-time polymerase chain reaction was performed, and changes in gene expression were determined by the 2-∆∆Ct method of relative quantification. Results: In the CC group, Beclin gene expression level was found to be higher and this difference was statistically significant (P=0.0024). Similarly, cysteine-aspartic acid protease (caspase) 9 and hypoxia-inducible factor 1α messenger ribonucleic acid (mRNA) gene expression level increased and were significantly different in the CC group. In the BC group, Beclin and microtubule-associated protein light chain 3 expressions were higher in the samples taken one day after surgery. Caspases 3 and 8 gene expressions were significantly different in the BC group. Conclusion: As a result of the analysis performed between the two cardioplegia groups, it has been shown that CC harms the myocardium more than BC at the level of mRNA expression of related markers.
DOI: 10.6084/m9.figshare.14281967
title: Heavy Rainfall Mapping for Tocantins State, Brazil

description: Abstract This study aimed to map heavy rainfall with durations of 10, 30, 720 and 1440 minutes, associated with return times of 10, 50 and 100 years for the Tocantins State. Historical series of 95 pluviometric stations located in the Tocantins State and nearby were applied, with standard period from 1983 to 2013. A geostatistical study was conducted, evaluating the spherical, exponential and gaussian semivariogram models, adjusted by the weighted least squares method. From this study, the model that presented the smallest average error based on cross-validation was applied to the mapping process by ordinary kriging. There was good performance of the geostatistical techniques, being possible to highlight the spherical model for the mapping of the annual maximum daily precipitation and the Gaussian model for the rains calculated by the methodology of disaggregation. It was also verified that the areas of intense rainfall of greater severity in the state are in the Bico do Papagaio (north), Bananal Island (southwest) and northwest of the state.
DOI: 10.6084/m9.figshare.14268729
title: Atmospheric Model Precipitation Forecast Analysis to Support Reservoir Systems Operation

description: Abstract Global and regional atmospheric models are important tools for water resources management. Aiming to provide river flow forecast and to support water supply systems operation, this study evaluated the precipitation forecasts from three atmospheric models. Forecasts from ETA (horizontal resolution of 40 km, 10 days range), BAM (horizontal resolution of 20 km, 10 days range) and WRF (horizontal resolution of 5 km, 3 days range) models were analyzed for the Cantareira system basins, on Brazil’s southwestern region. The forecasts were compared to rain gauge and radar observations. Different performance indices were used: Pearson’s correlation coefficient, modified Kling-Gupta efficiency, slope for the linear regression between forecasts and observations, RMSE and PBIAS, in addition to categorical indices fBIAS, POD e FAR. It was found that the correlations were stronger for the first days of the forecast. The strongest correlations were found when comparing the accumulated precipitations for the whole forecast period. Bias analysis indicated ETA strongly underestimated observations, while BAM strongly overestimated, and WRF slightly underestimated. Global and regional atmospheric models rainfall forecasts are an important input for reservoir operation. It’s essential, though, to understand its behavior to minimize inaccuracies and maximize its value in decision making.
DOI: 10.6084/m9.figshare.14281967.v1
title: Heavy Rainfall Mapping for Tocantins State, Brazil

description: Abstract This study aimed to map heavy rainfall with durations of 10, 30, 720 and 1440 minutes, associated with return times of 10, 50 and 100 years for the Tocantins State. Historical series of 95 pluviometric stations located in the Tocantins State and nearby were applied, with standard period from 1983 to 2013. A geostatistical study was conducted, evaluating the spherical, exponential and gaussian semivariogram models, adjusted by the weighted least squares method. From this study, the model that presented the smallest average error based on cross-validation was applied to the mapping process by ordinary kriging. There was good performance of the geostatistical techniques, being possible to highlight the spherical model for the mapping of the annual maximum daily precipitation and the Gaussian model for the rains calculated by the methodology of disaggregation. It was also verified that the areas of intense rainfall of greater severity in the state are in the Bico do Papagaio (north), Bananal Island (southwest) and northwest of the state.