Abstract In recent years, nanocarriers have been studied as promising pharmaceutical tools for controlled drug-delivery, treatment-efficacy follow-up and disease imaging. Among them, X-shaped amphiphilic polymeric micelles (Tetronic®, poloxamines) display great potential due to their biocompatibility and non-toxic effects, among others. In the present work, polymeric micelles based on the T1307 copolymer were initially decorated with a 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY)-fluorophore in order to determinate its in vivo biodistribution on 4T1 tumor-bearing mice. However, unfavorable results with this probe led to two different strategies. On the one hand, the BODIPY-micelle-loaded, L-T1307-BODIPY, and on the other hand, the 99mTc-micelle-radiolabeled, L-T1307- 99m Tc, were analyzed separately in vivo. The results indicated that T1307 accumulates mainly in the stomach, the kidneys, the lungs and the tumor, reaching the maximum organ-accumulation 2 hours after intravenous injection. Additionally, and according to the results obtained for L-T1307- 99m Tc, the capture of the polymeric micelles in organs could be observed up to 24 hours after injection. The results obtained in this work were promising towards the development of new radiotracer agents for breast cancer based on X-shaped polymeric micelles.

Giant cell granuloma represents a non-odontogenic tumor. It is located inside the endosteum of the jaws (central) or in the periosteum (peripheral). Although it is a benign disease process, it can also be locally destructive. This condition is a slow-growing, asymptomatic lesion that usually affects children and young adults, predominantly females in its peripheral presentation and males in its central presentation. The mandible, the region of the incisors, canines and premolars are more affected. The etiology of the giant cell granuloma still remains to be defined. It has been reported that the origin of this lesion could be triggered by trauma or inflammation and hormonal factors. A 6-year-old patient presents a slow-growing lesion in the tooth extraction's region, two months ago. The treatment is surgical. It is important to have an early diagnosis because of the high local destructive behavior and timely referral because the treatment is surgical.

El granuloma gigantocelular representa un tumor no odontogénico que se localiza por dentro del endostio de los maxilares (central) o en el periostio (periférico). Corresponde al 3-5 % de todas las lesiones benignas de los maxilares. Es más frecuente en niños y adultos jóvenes. Se presenta como un tumor de crecimiento lento y asintomático. Preferentemente, se ubica en la mandíbula, en la región de los incisivos, caninos y premolares. Se informa sobre un paciente de 6 años de edad que, conjuntamente con la extracción del premolar temporario inferior, presentó un tejido granulomatoso de crecimiento lento en la región premolar izquierda. La toma de la biopsia fue demostrativa para granuloma gigantocelular. Se realizó el tratamiento quirúrgico, con buena evolución, sin evidencia de recidiva hasta la actualidad. Es importante el diagnóstico temprano de esta lesión por el alto poder destructivo local que presenta y la derivación oportuna para el tratamiento quirúrgico.

En la actualidad existen diversos dispositivos comerciales de adquisición de bioseñales cerebrales electroencefalográficas (EEG) en el mercado, cada uno con diferentes prestaciones y posibles aplicaciones en ingeniería, investigación médica, etc. El presente trabajo describe el desarrollo de una interfaz cerebro ordenador (BCI) utilizando el dispositivo EEG Emotiv Insight por sus características técnicas comparadas a otros modelos de la propia compañía Emotiv y modelos de otras compañías. Se han utilizado como herramientas, un lenguaje de programación orientado a objetos para el desarrollo del programa principal que gestiona las intenciones captadas por el dispositivo EEG para aplicarlas a algún fin, un kit de desarrollo de aplicaciones propio de Emotiv para acceder a las funciones de la interfaz de programación de aplicaciones y scripts de Matlab para el desarrollo de una interfaz de usuario y el análisis de las bioseñales captadas. Las aplicaciones de esta interfaz BCI van desde el estudio de bioseñales cerebrales de manera gráfica hasta aplicaciones en domótica u otros.

Currently, there are several commercial devices for the acquisition of brain electroencephalographic (EEG) biosignals in the market, each one with different benefits and possible applications in engineering, medical research, etc. The present work describes the development of a computer brain interface (BCI) using the EEG Emotiv Insight device for its technical characteristics compared to other Emotiv own models and models from other companies. They have been used as tools, an object-oriented programming language for the development of the main program that manages the intentions captured by the EEG device to apply them for some purpose, an Emotiv own application development kit to access the functions of the application programming interface and Matlab scripts for the development of a user interface and the analysis of the captured biosignals. The applications of this BCI interface range from the study of brain biosignals graphically to applications in home automation or others.

Melkersson Rosenthal syndrome is a very infrequent disease of unknown etiology, chronic and progressive course, with neurocutaneous disease that affects the orofacial innervation and mucocutaneous tissues with non-caseating granulomatous infiltration. Clinically, it is characterized by the diagnostic triad: recurrent edema of lips and/or face; recurrent and alternating acute peripheral facial paralysis and scrotal or geographic tongue. The condition generally presents as oligosymptomatic or monosymptomatic form. Two patients are presented with completed triad and oligosymptomatic form. This recent review published by G. Kayabasoglu et al. states that only 30 patients have been described in the international literature in childhood. So we consider this disease in the differential diagnosis in the presence of acute peripheral facial paralysis and/or lips or facial edema.

El síndrome de Melkersson-Rosenthal es una enfermedad muy poco frecuente en el paciente adulto y excepcional en la niñez y la adolescencia. El reciente trabajo publicado por G. Kayabasoglu et al., afirma que solo 30 pacientes se han descrito en la literatura internacional en edad pediátrica. Es de etiología desconocida, de curso crónico y progresivo, con compromiso neuromucocutáneo que afecta la inervación orofacial con infiltración granulomatosa no caseificante. Clínicamente, se caracteriza por una tríada diagnóstica: edema recurrente de labios y/o cara, parálisis facial periférica aguda recurrente y alternante, y lengua escrotal o geográfica. Existen presentaciones oligosintomáticas y monosintomáticas. Se describen dos pacientes de 7 y 11 años de edad, con presentación completa en un caso y oligosintomática en el otro. Consideramos tener en cuenta esta enfermedad infrecuente como diagnóstico diferencial ante la presencia de parálisis facial periférica aguda recurrente y/o edema de hemicara o labios por su comportamiento evolutivo.

Background: Body mass index (BMI) and waist circumference (WC) are the most commonly measured anthropometric parameters given their association with cardiovascular risk factors (RFs). The relationship between percentage body fat (%BF) and cardiovascular risk has not been extensively studied. Aims: This study evaluated %BF and its relationship with cardiometabolic RFs in healthy subjects and compared these findings with the relationship between BMI/ WC and cardiovascular RFs. Methods: This was a cross-sectional study of 99 males and 83 females (mean age 38 ±10 years) evaluated in a preventive cardiology program. All subjects completed a survey about RFs and lifestyle habits. Anthropometric parameters, systolic blood pressure (SBP), diastolic blood pressure (DBP), fasting lipid profile, and blood glucose were collected. Body fat was determined using four skinfold measurements. Fat mass index (FMI) was also calculated. Results: Percentage body fat was significantly and directly associated with total cholesterol (R²=0.11), triglycerides (R²=0.14), low-density lipoprotein cholesterol (R²=0.16), non-high-density lipoprotein cholesterol (R²=0.24), fasting blood glucose (R²=0.16), SBP (R²= 0.22), and DBP (R²=0.13) (p<0.001 for all) and inversely related to high-density lipoprotein cholesterol (R²= 0.32; p<0.001). When the models of %BF, FMI, WC, and BMI were compared, all of them were significantly related to the same cardiometabolic RFs and the clustering of them. Conclusion: Percentage body fat and FMI were significantly associated with biochemical variables and to the clustering of RFs. However, these associations were similar but not better than WC and BMI.

Introducción: El índice de masa corporal (IMC) y la circunferencia de cintura (CC) son los parámetros antropométricos que se miden con mayor frecuencia dada su asociación con los factores de riesgo cardiovascular (RC). La relación entre el porcentaje de grasa corporal (%GC) y el riesgo cardiovascular no se ha estudiado ampliamente. Objetivo: Evaluar el %GC y su relación con los FR cardiometabólico en sujetos sanos y comparar estos resultados con la relación IMC/CC y FR cardiovascular Métodos: Se realizó un estudio transversal en 99 hombres y 83 mujeres participantes asistentes a un programa de cardiología preventiva (edad 38 ± 10 años). Todos los sujetos completaron una encuesta sobre los FR y hábitos de estilos de vida. Se evaluaron antropométricamente , se les tomo presión arterial sistólica (PAS) y diastólica (PAD), perfil lipídico y glicemia en ayunas. La grasa corporal se determinó a través de cuatro mediciones de pliegues cutáneos. También se calculó el índice de masa grasa (IMG). Resultados: El porcentaje de grasa corporal se asoció significativamente y directamente con el colesterol total (R²=0,11), triglicéridos (R²=0,14), colesterol LDL (R²=0,16), colesterol VLDL (R²=0,24), glicemia (R²=0,16), PAS (R²=0,22) y PAD (R²=0,13) (p<0,001 para todos) e inversamente relacionada con HDL (R²=0,32; p<0,001). Cuando se compararon los modelos de %GC, IMG, CC e IMC, todos ellos se asociaron en forma significativa a los mismos FR cardiometabólico y a la agregación de los mismos. Conclusión: El %GC e IMG se asociaron en forma significativa con las variables bioquímicas y la agregación de FR. Sin embargo, estas asociaciones eran similares pero no mejor que la CC y el IMC.

Exercise and cardiac rehabilitation are indications with type I A evidence in most secondary cardiovascular prevention guidelines. Rehabilitation programs not only include exercise but also provide integral care and education about cardiovascular risk factors. However there is a paucity of such programs in Chile. Moreover there is a lack of awareness about the benefits of exercise and there is lack of knowledge about the details of exercise prescription in secondary prevention. Therefore, the divulgation of this knowledge is of utmost importance.

Background: Cardio respiratory fitness (FIT) is associated with a better profile in most modifiable cardiovascular risk factors (RF). In Chile, sedentary lifestyle is highly prevalent, reaching almost 90%. Aim: To determine the association between FIT and traditional and emergent RF in a primary prevention population. Material and methods: We prospectively studied 1973 subjects (36% women, mean age 56± 13 years) without history of cardiovascular disease and absence of ischemic changes on exercise testing. We assessed cardiovascular RF and determined body mass index (BMI), waist circumference, systolic and diastolic blood pressure, fasting blood lipids, glucose, C-reactive protein (CRP) and fibrinogen. FIT was measured by a Sci f-reported physical activity questionnaire and by a maximal treadmill exercise test, expressed in metabolic equivalents (METs). Results: Subjects in the highest FIT according to the treadmill test had significantly lower BMI, waist circumference, systolic and diastolic blood pressure, total cholesterol, triglycerides, glucose, CRP and fibrinogen, and higher HDL cholesterol (adjusted by age and gender). LDL cholesterol did not show significant changes. The same pattern of RF (including LDL cholesterol) and CRP was observed when using Sci f-reported physical activity as a FIT parameter There was a significant association between both methods to measure FIT (p <0.0001, Chi-square Mantel-Haenszel). Conclusions: Our findings show that a better level off IT, assessed by exercise testing or through Sci f report is associated with improved levels of traditional and emergent RF.

Background: In large series, nearly 60% of admissions for suspected acute coronary syndrome (ACS) had a non-coronary etiology of the pain. However, short term mortality of non recognized ACS patients, mistakenly discharged from the emergency room is at least twice greater than the expected if they would had been admitted. The concept of a chest pain unit (CPU) is a methodological approach developed to address these issues. Aim: To evaluate the efficacy of a CPU in the emergency room of a general hospital for evaluation of acute chest pain. Material and Methods: Prospective study of patients with chest pain admitted in the CPU. After a clinical, electrocardiographic and laboratory evaluation with cardiac injury serum markers, patients were stratified in three risk groups, based on the likelihood of ACS of the American Heart Association. High probability patients were admitted to the Coronary Unit (CU) for treatment. Moderate probability patients remained in the CPU for further evaluation and low probability patients were discharged with telephonic follow-up. Results: Of 407 patients, 35, 30 and 35% were stratified as high, intermediate and low probability ACS, respectively. Among patients admitted with high probability, 73% had a confirmed ACS diagnosis. Among intermediate probability patients, 86% were discharged after an evaluation in the CPU without adverse events in the follow-up. Conclusion: Structured risk evaluation approach in a CPU improves the management of acute chest pain, identifying high probability patients for fast admission and start of treatment in a CU and allowing safe discharge of low probability ones