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( Yasser Hessen Abdou ),( Maria Angeles Perez Martinez ),( Natalia Pinlla Echevarri ),( Maria Thiscal Lopez Lluva ),( Fernando Lozano Ruiz Poveda ),( Ignacio Sanchez Perez ),( Miguel Angel Rienda More 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
A 36 year-old man was referred to our hospital for the evaluation of an abnormal shadow on the cardiac apex on a chest X-ray fi lm.He denied systemic disease such as hypertension or diabetes mellitus and had no history of specifi c conditions, such as Kawasaki`s disease, chest trauma or connective tissue disorder. He had no subjective symptoms. His blood pressure was 120/75 mmHg and pulse rate was 70 beats/min. On physical examination, continuous murmur of a grade II/VI was audible at 4th left intercostal space. The results of other physical examination and blood test were normal. A Chest X-ray showed a radio-opaque shadow at the apex. An echocardiography was arranged and a round sac of 4x4 cm located in the apex, as well as a double-chamber right ventricle was observed Contrast echocardiography with Sonovue showed the fi lling of the vascular sac with contrast then partial fi lling of the distal RV apex. The abnormal vascular sac was connected from the left side to a vascular structure that looks to be coronary artery and from the right side to the distal part of a double right ventricle apex with a bi-directional shunt (fi stula). It also demonstrates the high velocity and centrifuge nature of blood fl ow in the vascular sac. Chest CT showed a LAD ectasia with a 4x4 cm saccular aneurysm at the distal portion of LAD Cardiac MRI revealed a giant left descending coronary artery distal aneurysm attached to a double apex right ventricle Coronary angiography revealed a dilated LAD with a huge saccular coronary aneurysm at its distal portion. The patient refused surgical correction for the coronary aneurysm and fi stula. He was discharged and has been followed up for more than 1 year without cardiovascular events.
Chaotic Synchronization of Regular and Irregular Complex Networks with Fractional Order Oscillators
Cornelio Posadas-Castillo,Sara Angulo-Guzman,Miguel Angel Platas-Garza,David Alejandro Diaz-Romero,Didier Lopez-Mancilla 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.4
Synchronization of N-coupled fractional-order (FO) chaotic oscillators arranged in regular and irregulartopologies is numerically studied. Synchronization is achieved based on the coupling matrix from the complexsystems theory. In particular, we consider complex dynamical networks composed by Lorenz, Volta, Duffing andFinancial FO chaotic oscillators, where the interaction of the nodes is defined by coupling only one state of eachFO oscillator.
Arcelio Martinez-Dominguez,Faustino Ruiz-Aquino,Wenceslao Santiago-Garcia,Pablo Antunez,Miguel Angel Lopez-Lopez,Cesar Valenzuela-Encinas,Rossy Feria-Reyes 한국산림과학회 2020 Forest Science And Technology Vol.16 No.3
The estimation of tree biomass serves as a parameter of forest productivity; in addition, it is a method to estimate carbon fixation and storage. Studies on total biomass that include the belowground component for the Pinus genus are scarce in Mexico due to the difficulty and high costs for its quantification. In this study, allometric models were fitted to estimate the total biomass of Pinus patula Schiede ex Schltdl. & Cham., from the pine-oak forest of Ixtl an de Juarez, Oaxaca, for which a destructive analysis was made of 25 trees distributed in five diameter classes, classifying the biomass by components (root, stem, branches and foliage). With the component biomass data, different models were fitted by nonlinear regression techniques, using the diameter at breast height (D, cm) and the total height (TH, m) as independent variables. The model with the best fit was an exponential type y ¼ eðb0þb1 ln ðDTHÞÞ : In this study, it was observed that the studied species stores 22.62% of the biomass in the root, 69.61% in the stem, 5.67% in the branches and 2.11%, in the foliage. The models proposed in this study allow the estimation of total biomass and by structural component independently and additively. Its use is recommended in trees of P. patula, in the range of 5 to 25 cm of diameter at breast height, in forests with similar growing conditions.
Prostate Cancer, High Cortisol Levels and Complex Hormonal Interaction
Fabre, Bibiana,Grosman, Halina,Gonzalez, Diego,Machulsky, Nahuel Fernandez,Repetto, Esteban M,Mesch, Viviana,Lopez, Miguel Angel,Mazza, Osvaldo,Berg, Gabriela Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.7
Prostate cancer (PCa) is one of the most common diseases in men. It is important to assess prognostic factors and whether high cortisol levels and complex hormonal interactions could be responsible for PCa development. We evaluated the relationship between cortisol, leptin and estrogens in 141 men, 71 with PCa and the remaining 70 constituting a low risk group (LRG). They were recruited for this study from a total of 2906 middle-aged men (ages 45-70 years) who completed an evaluation for prostatic diseases at the Urology Division, Hospital de Clínicas "$Jos{\acute{e}}$ de San $Mart{\acute{i}}n$", University of Buenos Aires, in May 2009. In this cross sectional study, cortisol, PSA, total-testosterone, free-testosterone, bioavailable testosterone, LH and estradiol were measured in serum. We observed increased cortisol levels in PCa patients as compared to LRG cases (p=0.004,). Leptin and estradiol levels were also higher in PCa patients (p=0.048; p<0.0001, respectively). Logistic regression analysis indicated that serum cortisol (OR: 1.110 (95% CI 1.016-1.213), p=0.022), estradiol (OR: 1.044 (95% CI 1.008-1.081), p=0.016) and leptin (OR: 1.248 (95% CI 1.048-1.487), p=0.013) explained 27% of the variance of dependent variables, even after adjusting for age, smoking, BMI and waist circumference. We found increased cortisol levels in PCa patients as compared to LRG, as well as an altered circulating hormonal profile.
Israel Parra-Ortega,Diana Guadalupe Alcara-Ramirez,Alma Angelica Ronzon-Ronzon,Fermin Elias-Garcia,Jose Agustin Mata-Chapol,Alejandro Daniel Cervantes-Cot,Briceida Lopez-Martinez,Miguel Angel Villasis 한국영양학회 2021 Nutrition Research and Practice Vol.15 No.S
BACKGROUND/OBJECTIVES: Considering the high number of deaths from coronavirus disease 2019 (COVID-19) in Latin American countries, together with multiple factors that increase the prevalence of vitamin D deficiency, we aimed to determine 25-hydroxyvitamin D (25[OH]D) levels and its association with mortality in patients with critical COVID-19. SUBJECTS/METHODS: This was a prospective observational study including adult patients with critical COVID-19. Data, including clinical characteristics and 25(OH)D levels measured at the time of intensive care unit admission, were collected. All patients were followed until hospital discharge or in-hospital death. The patients were divided into those surviving and deceased patient groups, and univariate and multivariate logistic regression analyses were performed to determine independent predictors of in hospital mortality. RESULTS: The entire cohort comprised 94 patients with critical COVID-19 (males, 59.6%; median age, 61.5 years). The median 25(OH)D level was 12.7 ng/mL, and 15 (16%) and 79 (84%) patients had vitamin D insufficiency and vitamin D deficiency, respectively. The median serum 25(OH)D level was significantly lower in deceased patients compared with surviving (12.1 vs. 18.7 ng/mL, P < 0.001). Vitamin D deficiency was present in 100% of the deceased patients. Multivariate logistic regression analysis revealed that age, body mass index, other risk factors, and 25(OH)D level were independent predictors of mortality. CONCLUSIONS: Vitamin D deficiency was present in 84% of critical COVID-19 patients. Serum 25(OH)D was independently associated with mortality in critical patients with COVID-19.