The Effects of Multiple Micronutrient Fortified Beverage and Responsive Caregiving Interventions on Early Childhood Development, Hemoglobin, and Ferritin among Infants in Rural Guatemala.

Undernutrition and a lack of learning opportunities can jeopardize long-term growth and development among infants in low- and middle-income countries. We conducted a 6-month 2 × 2 cluster-randomized trial to assess the effects of multiple micronutrient-fortified beverages and responsive caregiving interventions among infants 6-18 months in 72 community sectors in southwest Guatemala. We administered baseline and endline assessments of childhood development (Bayley Scales of Infant and Toddler Development) and socioemotional development (Brief Infant Toddler Socio-Emotional Assessment) and measured ferritin and hemoglobin on a subsample. The trial was analyzed using linear mixed models. At the baseline, the mean age (SD) was 13.0 (4.6) months, including 49% males, 32% who were stunted, 55% who were anemic, and 58% who were iron deficient. At the endline (n = 328/386, 85% retention), there was no synergistic effect on the fortified beverage and responsive caregiving intervention. Compared to the non-fortified beverage group, socioemotional development improved in the fortified beverage group. There were no intervention effects on other measures of child development, hemoglobin, or ferritin. In a setting with high rates of anemia and iron deficiency, a multiple micronutrient-fortified beverage improved infants' socioemotional development.

Health-related quality of life and radiological and functional lung changes of patients with COVID-19 Pneumonia 3 and 10 months after discharge.

BACKGROUND: Few studies have evaluated the long-term impact on health-related quality of life (HRQoL) in patients who have been hospitalized for COVID-19 pneumonia. Specific follow-up should be carried out to detect and treat possible pulmonary abnormalities, and the worsening of HRQoL should be estimated to target necessary resources for care of these patients after acute phase. The objective was to know the impact on HRQoL of patients who have been admitted for COVID-19 pneumonia, and to evaluate the clinical-radiological and functional changes of patients who have overcome COVID-19 pneumonia at 3 and 10 months of follow-up. METHODS: Prospective observational study of patients who required hospitalization for COVID-19 pneumonia between April and December 2020. All patients filled out the EuroQol five-dimension (EQ-5D) questionnaire with the EuroQol Visual Analogue Scale (E-VAS) for self-assessment of health status. Respiratory function tests and chest X-ray were carried out at 3 and 10 months of follow-up. RESULTS: 61 patients were included in the study. The need for ventilatory support was associated with anxiety/depression on the EQ-5D scale, as well as patients admitted to the intensive care unit (ICU). The mean EQ-5D and E-VAS index scores decreased with hospitalization time, the number of days spent in intermediate respiratory care unit (IRCU) and the level of dyspnoea at the beginning of the hospitalization period. Pulmonary sequelae were observed in 25 patients (41%) at 3 months and 17 (27.9%) at 10 months. Patients improve their forced vital capacity (FVC) by 196 ml (p = 0.001) at 10 months as well as 9% in diffusing capacity of lung for carbon monoxide (DLCO) (p = 0.001) at 10 months. DLCO was found to be correlated to lymphopenia and time spent in IRCU. Low FVC values were detected 10 months after discharge for subjects exhibiting high levels of dyspnoea at 3 months after discharge. CONCLUSIONS: Hospitalization for COVID-19 pneumonia affects the HRQoL of patients, with greater anxiety/depression in those who were more serious affected and are younger. A significant percentage of patients present fibrotic abnormalities and lung function impairment at the first and second follow-up after discharge.

Training Plan for the Continuity of Non-Presential Education in Six Peruvian Universities during COVID-19.

This article shows the response offered by the UTEC-UNED-TECSUP Consortium to six Peruvian public (national) universities aimed at strengthening the digital competences of their communities, made up of managers, teachers, students, and support technicians. The contextual and situational diagnosis, which covered organizational, technological, and competence dimensions, revealed a series of cross-cutting needs related to technological skills that prevented the training or mobilization of the digital competences necessary for progress in the other dimensions under study. The response was an online training plan, consisting of three training programs and eighty-three courses. The pedagogical strategy was based on the scaling of competence achievements that ended with problem-solving and applications in daily activities. The accompaniment was carried out through virtual tutorials, distributed via synchronous and asynchronous sessions. In total, 5034 were involved-347 were teachers and managers, 4932 were students, and 25 were technical staff. The pedagogical and socio-emotional limitations of the university community, as well as the scarcity of technological resources and poor connectivity, meant that the plan was only partially implemented. Moreover, the short and intense period of development to which the universities were subjected was also a factor.

Zinc deficiency associated with anaemia among young children in rural Guatemala.

One in four children younger than age five in Guatemala experiences anaemia (haemoglobin <11.0 g/dl). This study characterized the factors and micronutrient deficiencies associated with anaemia in a baseline cross-sectional sample of 182 Guatemalan infants/toddlers and 207 preschoolers, using generalized linear mixed models. Associations between anaemia and maternal, child and household variables, and biomarkers (soluble transferrin receptor, ferritin, zinc, folate, vitamin B12, C-reactive protein, and α1-acid glycoprotein) were explored. Rates of anaemia were 56% among infants/toddlers and 12.1% among preschoolers. In children with anaemia, rates of iron deficiency (low ferritin based on inflammation status, and/or high soluble transferrin receptor, ≥1.97 mg/L) and zinc deficiency (serum zinc <65 µg/dl) were 81.1% and 53.7%, respectively. Folate deficiency (either plasma folate <3 ng/ml or erythrocyte folate <100 ng/ml) was 3.3%. Vitamin B12 deficiency (plasma vitamin B12 <148 pmol/L) was 7.5%. For infants and toddlers (<24 months), the odds ratio of anaemia was lower when higher number of adults lived in the household (OR = 0.69; 95% CI [0.53, 0.90]), and higher when children were zinc deficient (OR = 3.40; 95% CI [1.54, 7.47]). For preschoolers (36-60 months), the odds ratio of anaemia was lower for every additional month of age (OR = 0.90; 95% CI [0.81, 1.00]). Findings suggest that micronutrient deficiencies coexist in Guatemalan rural children, and zinc deficiency is associated with anaemia in children <24 months, highlighting the need of continued multidisciplinary interventions with multiple micronutrients. Further research examining how household composition, feeding practices, and accessibility to micronutrient supplements and to animal source foods is needed to incorporate strategies to improve the nutritional status of Guatemalan children.

Elimination of Escherichia coli in Water Using Cobalt Ferrite Nanoparticles: Laboratory and Pilot Plant Experiments.

This paper focuses on the synthesis of cobalt ferrite nanoparticles by the sol-gel method and their photocatalytic activity to eliminate bacteria in aqueous media at two different scales: in a laboratory reactor and a solar pilot plant. Cobalt ferrite nanoparticles were prepared using Co(II) and Fe(II) salts as precursors and cetyltrimethyl ammonium bromide as a surfactant. The obtained nanoparticles were characterized by X-ray diffraction, scanning and transmission electron microscopy. Escherichia coli (E. coli) strain ATCC 22922 was used as model bacteria for contact biocidal analysis carried out by disk diffusion method and photocatalysis under an ultraviolet A (UV-A) lamp for laboratory analysis and solar radiation (radiation below 350 W/m2 in a typical cloudy day) for the pilot plant analysis. The results showed that cobalt ferrite nanoparticles have an average diameter of (36 ± 20) nm and the X-ray diffraction pattern shows a cubic spinel structure. Using the disk diffusion technique, it was obtained inhibition zones of (17 ± 2) mm diameter. Results confirm the photocatalytic elimination of E. coli in water samples with remaining bacteria below 1% of the initial concentration during the experiment time (30 min for laboratory tests and 1.5 h for pilot plant tests).

The role of CPAP treatment in elderly patients with moderate obstructive sleep apnoea: a multicentre randomised controlled trial.

The efficacy of continuous positive airway pressure (CPAP) treatment in elderly patients with nonsevere obstructive sleep apnoea (OSA) is controversial. The objective of this study was to assess the effect of CPAP treatment in elderly patients with moderate OSA in terms of clinical, quality-of-life and neurocognitive measures.This was an open-label, randomised, multicentre clinical trial in 145 elderly patients (≥70 years old) with confirmed moderate OSA (apnoea-hypopnoea index 15-29.9 events·h-1) randomised to receive CPAP (n=73) or no CPAP (n=72) for 3 months. The primary end-point was the Epworth Sleepiness Scale (ESS) score, and the secondary end-points included quality of life (Quebec Sleep Questionnaire (QSQ) domain scores), sleep-related symptoms, presence of anxiety/depression, office-based blood pressure measurements and some neurocognitive tests. The analysis was performed according to the intention-to-treat principle.Mean±sd age was 74.9±4.6 years. The CPAP group achieved a greater improvement in the ESS score (adjusted difference of 2.6 (95% CI 3.6-1.6) points; effect size 1) in some sleep-related symptoms and in some dimensions of the QSQ questionnaire (nocturnal symptoms: -0.7 (95% CI -0.3--1.0) points; p<0.0001 and emotions: -0.4 (95% CI -0.1--0.7) points; p=0.023). However, CPAP did not demonstrate any effect on either neurocognitive tests (including anxiety and depression) or blood pressure levels. There was a positive correlation between the effect of CPAP and the improvement in ESS scores and quality of life domains.CPAP treatment resulted in a significant improvement in diurnal hypersomnia and some sleep-related symptoms and quality of life domains in elderly patients with moderate OSA.

Pathways of the association between maternal employment and weight status among women and children: Qualitative findings from Guatemala.

The double burden of malnutrition, defined by the coexistence of undernutrition and overweight, is well documented in low- and middle-income countries. However, the mechanisms by which employment may be related to maternal and child weight status in low- and middle-income countries are not well understood. We conducted in-depth interviews among 20 mothers who participated in Project MIEL, a contemporary trial which evaluated the effects of an integrated micronutrient supplement and parenting intervention in rural Guatemala. We utilized semi-structured interviews to explore the pathways by which maternal employment might influence bodyweight. Interviews were structured to explore the factors that mothers considered when deciding whether or not to participate in the labor force and how mothers perceived the influence of employment on determinants of their own bodyweight and that of their children. Themes were used to develop a conceptual framework. Mothers described four pathways through which employment could lead to changes in weight status: changes in food purchasing; improved household well-being; changes in time allocation; and psychological effects. Mothers described purchasing increased quantities and more varied types of food, as well as the purchase of energy-dense foods. Less time to devote to food preparation resulted in mothers preparing quicker meals and relying on substitute childcare. Mothers also expressed feelings of worry and neglect in relation to being employed, and perceived that these feelings would affect weight. A better understanding of these mechanisms is important for developing policies and programs to support women in the workplace and also reducing maternal and child overweight in Guatemala.

Tos ferina del adulto: una enfermedad emergente en la consulta del neumólogo / Pertussis in Adults: A Growing Diagnosis in the Pulmonology Clinic

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Obstructive sleep apnoea in the elderly: role of continuous positive airway pressure treatment.

Almost all the information about the effect of continuous positive airway pressure (CPAP) in patients with obstructive sleep apnoea (OSA) comes from clinical trials involving only middle-aged patients. The objective of this study was to assess the effect of CPAP treatment in elderly patients with severe OSA on clinical, quality-of-life and neurocognitive spheres. We performed an open-label, randomised, multicentre clinical trial in a consecutive clinical cohort of 224 elderly (≥70 years old) patients with confirmed severe OSA (apnoea-hypopnea index ≥30) randomised to receive CPAP (n=115) or no CPAP (n=109) for 3 months. A sleep study was performed by either full polysomnography or respiratory polygraphy. CPAP titration was performed by an autoCPAP device. The primary endpoint was quality of life (Quebec Sleep Questionnaire) and secondary endpoints included sleep-related symptoms, presence of anxiety/depression, office-based blood pressure and some neurocognitive tests. The mean±sd age was 75.5±3.9 years. The CPAP group achieved a greater improvement in all quality-of-life domains (p<0.001; effect size: 0.41-0.98), sleep-related symptoms (p<0.001; effect size 0.31-0.91) as well as anxiety (p=0.016; effect size 0.51) and depression (p<0.001; effect size: 0.28) indexes and some neurocognitive tests (digit symbol test (p=0.047; effect size: 0.20) and Trail Making Test A (p=0.029; effect size: 0.44)) in an intention-to-treat analysis. In conclusion, CPAP treatment resulted in an improvement in quality of life, sleep-related symptoms, anxiety and depression indexes and some neurocognitive aspects in elderly people with severe OSA.

Effect of γ-irradiation on the growth of ZnO nanorod films for photocatalytic disinfection of contaminated water.

The growth of ZnO nanorods on a flat substrate containing γ-irradiated seeds and their ability to photocatalytically eliminate bacteria in water were studied. The seed layer was obtained, by the spray pyrolysis technique, from zinc acetate solutions γ-irradiated within the range from 0 to 100 kGy. Subsequently, to grow the rods, the seeds were immersed in a basic solution of zinc nitrate maintained at 90 °C. The rate of crystal growth on the seed layer during the thermal bath treatment was kept constant. The resulting materials were characterized morphologically by scanning electron and atomic force microscopies; X-ray diffraction was used to study their morphology and structure and ultraviolet-visible spectroscopy to determine their absorbance. The obtained seed films were morphologically dependent on the radiation dose and this was correlated with the ZnO nanorod films which presented a texture in the (002) direction perpendicular to the substrate. The rods have a hexagonal mean cross section between 20 and 140 nm. Using these rods, the photocatalytic degradation of Escherichia coli bacteria in water was studied; a positive influence of the crystalline texture on the degradation rate was observed.

Exhaled nitric oxide measurement is not useful for predicting the response to inhaled corticosteroids in subjects with chronic cough.

BACKGROUND: Increased concentrations of exhaled nitric oxide (ENO) are identified predominantly in subjects with chronic cough due to conditions that habitually respond well to therapy with inhaled corticosteroids (ICSs). The aim of this study was to assess the usefulness of ENO in predicting the response to ICS therapy in subjects with chronic cough and to determine the relationship between either methacholine or adenosine 5'-monophosphate (AMP) responsiveness and the response to ICS therapy. METHODS: A total of 43 patients with chronic cough were studied. During the baseline period, ENO measurement, spirometry, and concentration-response studies with both methacholine and AMP were performed. For the next 4 weeks, the patients were treated with inhaled fluticasone propionate, 100 microg twice daily. At baseline (1 week) and during the 4-week treatment period, patients twice daily completed entries in a diary, in which they recorded daytime and nighttime cough symptom scores. RESULTS: Nineteen patients (44%) responded well to fluticasone therapy. The receiver operating characteristic curve analysis showed that the accuracy of identifying the response to ICS therapy for ENO at baseline was poor. The sensitivity and specificity of ENO for predicting the response to ICS therapy, using 20 parts per billion as the ENO cutoff point, were 53% and 63%, respectively. Differences in both prevalence and degree of airway responsiveness to either methacholine or AMP between fluticasone-responsive subjects and nonresponsive subjects were also not significant. CONCLUSIONS: Although a significant proportion of subjects with chronic cough respond well to ICS therapy, these patients cannot be identified by ENO levels or AMP responsiveness at baseline.

Hypertension and sleep apnea-hypopnea syndrome: changes in echocardiographic abnormalities depending on the presence of hypertension and treatment with CPAP.

INTRODUCTION: Sleep apnea-hypopnea syndrome (SAHS) is an emerging disease with high prevalence. There is controversy as to whether cardiac abnormalities are due to the disease itself or to the arterial hypertension frequently associated with this disease. OBJECTIVES: To analyze echocardiographic abnormalities in a population of SAHS patients depending on the presence or absence of hypertension at the time of diagnosis and after six months of treatment with continuous positive airway pressure (CPAP). METHODS: We studied 85 consecutive patients diagnosed with SAHS who required treatment with CPAP (Hypertensive: 43, nonhypertensive: 42). We performed a baseline echocardiogram after six months of treatment. We analyzed morphological (wall thickness, diameters, ejection fraction) and functional (peak E- and A-wave velocities, deceleration time, Tei index) parameters of the left and right ventricles. RESULTS: Hypertensive patients were older and had higher blood pressure values, but there were no differences between groups in other clinical parameters. The hypertensive group had greater septal thickness (hypertensive: 12.1+/-2.3; nonhypertensive: 10.8+/-2.1mm; p=0.01). There were also differences in impairment of left (hypertensiveHT: 92.9%, nonhypertensive: 65%, p=0.002) and right (hypertensive: 74.4%, nonhypertensive: 42.1%, p=0.006) ventricular filling. After six months of treatment, an improvement of the myocardial performance index was noted in nonhypertensive patients (baseline Tei: 0.55+/-0.1 vs. 6-month Tei: 0.49+/-0.1; p=0.01), whereas no significant change was observed in hypertensive patients. CONCLUSIONS: Cardiac abnormalities in SAHS patients are increased in the presence of associated hypertension. Treatment with CPAP for six months improves cardiac abnormalities in nonhypertensive patients but not in hypertensive patients.

[Silent heart disease in patients with sleep apnea-hypopnea syndrome: usefulness of the myocardial performance index]. / Disfunción miocárdica silente en pacientes con síndrome de apneas-hipopneas durante el sueño. Valor del índice de rendimiento miocárdico.

OBJECTIVE: Sleep apnea-hypopnea syndrome (SAHS) is an emerging disease with considerable cardiovascular impact. The myocardial performance index (MPI) is an echocardiographic parameter that is useful in the assessment of global myocardial function. The purpose of this study was to identify any differences in the MPI between patients with and without SAHS. PATIENTS AND METHODS: We studied 120 consecutive patients referred to our department for suspected SAHS. Following the overnight sleep study and after excluding all patients with hypertension, heart disease, or invalid recordings, 54 patients with SAHS and 13 patients without the disease matched for age and body mass were analyzed. A blinded cardiologist performed Doppler echocardiography, measuring parameters related to ventricular hypertrophy, systolic function, diastolic function, and the MPI. The data were compared by chi(2) and analysis of variance. RESULTS: Mean (SD) ventricular mass was greater in patients with SAHS (183.17 [40.5] g) than in those without that diagnosis (149 [26] g) (P=.005). No differences were observed in systolic function (78.5% [8.95%] vs 81.6% [7%]) (P=.2), although a higher percentage of patients with SAHS had abnormal diastolic function (71.2% vs 38.5%) (P=.049). The MPI was significantly higher in SAHS patients (0.54 [0.12] vs 0.46 [0.07]) (P=.028). CONCLUSIONS: On its own, SAHS leads to left ventricular hypertrophy. Diastolic involvement is common in these patients, although a large number of healthy individuals who are obese also present it. The MPI is higher in SAHS and could be a useful parameter to identify patients with silent heart disease before it progresses.

Disfunción miocárdica silente en pacientes con síndrome de apneas-hipopneas durante el sueño. Valor del índice de rendimiento miocárdico / Silent heart disease in patients with sleep apnea-hypopnea syndrome: usefulness of the myocardial performance index

OBJETIVO: El síndrome de apneas-hipopneas durante el sueño (SAHS) es una enfermedad emergente con importante repercusión cardiovascular. El índice de rendimiento miocárdico (IRM) es un parámetro ecocardiográfico útil en la valoración de la función miocárdica global. El objetivo del estudio ha sido analizar si hay diferencias en el IRM entre pacientes con SAHS y un grupo control. PACIENTES Y MÉTODOS: Hemos estudiado a 120 pacientes consecutivos remitidos por sospecha de SAHS a nuestra unidad. Una vez realizado el estudio nocturno y excluidos los hipertensos, cardiópatas o registros inadecuados, analizamos a 54 pacientes y 13 controles de similar edad e índice de masa corporal. Un cardiólogo que desconocía la asignación les realizó un ecocardiograma Doppler. Se midieron parámetros de hipertrofia ventricular, función sistólica, función diastólica y el IRM. Los datos se compararon mediante el test de la χ2 y ANOVA. RESULTADOS: Los pacientes con SAHS presentaron mayor masa ventricular que el grupo control (media ± desviación estándar: 183,17 ± 40,5 frente a 149 ± 26 g; p = 0,005). No se apreciaron diferencias entre ambos grupos en la función sistólica (un 78,5 ± 8,95 frente al 81,6 ± 7%; p = 0,2), pero un mayor porcentaje de pacientes con SAHS tenía alterada la función diastólica (un 71,2 frente al 38,5%; p = 0,049). El IRM fue significativamente mayor en el grupo con SAHS (0,54 ± 0,12 frente a 0,46 ± 0,07; p = 0,028). CONCLUSIONES: El SAHS por sí mismo produce hipertrofia ventricular izquierda. La afectación diastólica es importante en este grupo, pero también la presenta un número importante de personas sanas con obesidad. El IRM está incrementado en el SAHS y podría ser útil para identificar a los pacientes con disfunción miocárdica silente antes de su progresión

OBJECTIVE: Sleep apnea-hypopnea syndrome (SAHS) is an emerging disease with considerable cardiovascular impact. The myocardial performance index (MPI) is an echocardiographic parameter that is useful in the assessment of global myocardial function. The purpose of this study was to identify any differences in the MPI between patients with and without SAHS. PATIENTS AND METHODS: We studied 120 consecutive patients referred to our department for suspected SAHS. Following the overnight sleep study and after excluding all patients with hypertension, heart disease, or invalid recordings, 54 patients with SAHS and 13 patients without the disease matched for age and body mass were analyzed. A blinded cardiologist performed Doppler echocardiography, measuring parameters related to ventricular hypertrophy, systolic function, diastolic function, and the MPI. The data were compared by c2 and analysis of variance. RESULTS: Mean (SD) ventricular mass was greater in patients with SAHS (183.17 [40.5] g) than in those without that diagnosis (149 [26] g) (P=.005). No differences were observed in systolic function (78.5% [8.95%] vs 81.6% [7%]) (P=.2), although a higher percentage of patients with SAHS had abnormal diastolic function (71.2% vs 38.5%) (P=.049). The MPI was significantly higher in SAHS patients (0.54 [0.12] vs 0.46 [0.07]) (P=.028). CONCLUSIONS: On its own, SAHS leads to left ventricular hypertrophy. Diastolic involvement is common in these patients, although a large number of healthy individuals who are obese also present it. The MPI is higher in SAHS and could be a useful parameter to identify patients with silent heart disease before it progresses

[Analysis of echocardiographic alterations observed in sleep apnea-hypopnea syndrome and how they are influenced by hypertension]. / Análisis de las alteraciones ecocardiográficas del síndrome de apneas e hipopneas del sueño y su modificación con la presencia de hipertensión arterial.

INTRODUCTION AND OBJECTIVES: Sleep apnea-hypopnea syndrome (SAHS) is associated with significant effects on the heart, which can be assessed using noninvasive methods such as transthoracic echocardiography. However, it is not clear whether these effects are due to the condition itself or are influenced by associated factors, such as high blood pressure (HBP). The objective of this study was to investigate the echocardiographic alterations observed in SAHS patients and how they are affected by the presence of concomitant HBP. METHODS: The study involved 103 consecutive patients (49 with HBP and 54 without) with SAHS and an indication for continuous positive airways pressure treatment and 24 controls matched for age and body mass index. Doppler echocardiography was performed in a blinded manner. Both morphology (i.e., wall thickness, and diameters) and function (i.e., ejection fraction, peak E and A wave velocities, mitral deceleration time, and Tei index) were assessed. Results were compared using ANOVA and Bonferroni's test. RESULTS: Hypertensive patients had larger morphological changes characteristic of left ventricular hypertrophy (i.e., increased septal and posterior wall thicknesses) than nonhypertensive patients, who in turn had larger changes than controls (septal thickness: HBP-SAHS, 12 [2] mm; non-HBP SAHS, 11 [2] mm, and controls, 9.5 [5] mm; 1 vs. 2, P=.038; 1 vs. 3, P=.0001, 2 vs. 3, P=.034) (posterior wall thickness: HBP-SAHS, 11 [2] mm; non-HBP SAHS, 10 [1] mm, and controls, 9 [1.5] mm; 1 vs. 2, P=.5; 1 vs. 3, P=.0001; 2 vs. 3, P=.001). In addition, there were also greater changes in ventricular filling patterns on the left (HBP-SAHS, 92%; non-HBP SAHS, 72%, controls, 29%; P=.0001) and on the right (HBP-SAHS, 72%; non-HBP SAHS, 58%; controls, 25%; P=.001). There was a trend towards a larger left ventricular Tei index (HBP-SAHS, 0.56 [0.2]; non-HBP SAHS, 0.54 [0.12]; controls, 0.5 [0.1]; 1 vs. 2, P=.8; 1 vs. 3, P=.09; 2 vs. 3, P=.7). CONCLUSIONS: From the time of diagnosis, SAHS was associated with left ventricular hypertrophy and impaired biventricular filling, even in the absence of concomitant HBP. The abnormalities observed were more severe when HBP was present.

Análisis de las alteraciones ecocardiográficas del síndrome de apneas e hipopneas del sueño y su modificación con la presencia de hipertensión arterial / Analysis of echocardiographic alterations observed in sleep apnea-hypopnea syndrome and how they are influenced by hypertension

Introducción y objetivos. El síndrome de apneas e hipopneas del sueño (SAHS) conlleva importantes repercusiones cardiacas que se pueden evaluar mediante métodos no invasivos como la ecocardiografía transtorácica; sin embargo, está por dilucidar si se deben a la propia enfermedad o a la influencia de factores concomitantes como la hipertensión arterial (HTA). El objetivo de este estudio es analizar las alteraciones ecocardiográficas en pacientes con SAHS y si se modifican en caso de HTA concomitante. Métodos. Estudiamos a 103 pacientes consecutivos diagnosticados de SAHS e indicación de presión positiva continua en la vía aérea (HTA, 49 pacientes; sin HTA, 54) frente a 24 controles ajustados por edad e índice de masa corporal. Realizamos ecocardiograma-Doppler por un observador para el que la asignación estaba enmascarada. Analizamos variables morfológicas (grosor de paredes y diámetros) y funcionales (fracción de eyección, velocidad máxima de ondas E y A, tiempo de deceleración mitral e índice Tei). Se compararon los resultados mediante ANOVA y test de Bonferroni. Resultados. Los pacientes hipertensos tuvieron más alteraciones morfológicas tipo hipertrofia ventricular izquierda (mayor grosor de septo y pared posterior) que los no hipertensos, y éstos más que los controles. Grosor del septo: SAHS-HTA (1), 12 ± 2; SAHS sin HTA (2), 11 ± 2, y controles (3), 9,5 ± 5 mm (1 frente a 2, p = 0,038; 1 frente a 3, p = 0,0001, y 2 frente a 3, p = 0,034). Pared posterior: SAHS-HTA, 11 ± 2; SAHS sin HTA, 10 ± 1, y controles, 9 ± 1,5 mm (1 frente a 2, p = 0,5; 1 frente a 3, p = 0,0001, y 2 frente a 3, p = 0,001). También hubo más alteraciones en el patrón de llenado ventricular izquierdo (SAHS-HTA, 92%; SAHS sin HTA, 72%, y controles, 29%; p = 0,0001) y derecho (SAHS-HTA, 72%; SAHS sin HTA, 58%, y controles, 25%; p = 0,001). Los valores del índice Tei del VI tuvieron tendencia a incrementarse (SAHS-HTA, 0,56 ± 0,2; SAHS sin HTA, 0,54 ± 0,12, y controles, 0,5 ± 0,1; 1 frente a 2, p = 0,8; 1 frente a 3, p = 0,09; 2 frente a 3, p = 0,7). Conclusiones. El SAHS presenta signos de hipertrofia ventricular izquierda y alteración del llenado biventricular aun en ausencia de HTA concomitante, y desde el momento de su diagnóstico. Las alteraciones detectadas son mayores cuando se asocia HTA (AU)

Introduction and objectives. Sleep apnea-hypopnea syndrome (SAHS) is associated with significant effects on the heart, which can be assessed using noninvasive methods such as transthoracic echocardiography. However, it is not clear whether these effects are due to the condition itself or are influenced by associated factors, such as high blood pressure (HBP). The objective of this study was to investigate the echocardiographic alterations observed in SAHS patients and how they are affected by the presence of concomitant HBP. Methods. The study involved 103 consecutive patients (49 with HBP and 54 without) with SAHS and an indication for continuous positive airways pressure treatment and 24 controls matched for age and body mass index. Doppler echocardiography was performed in a blinded manner. Both morphology (i.e., wall thickness, and diameters) and function (i.e., ejection fraction, peak E and A wave velocities, mitral deceleration time, and Tei index) were assessed. Results were compared using ANOVA and Bonferroni's test. Results. Hypertensive patients had larger morphological changes characteristic of left ventricular hypertrophy (i.e., increased septal and posterior wall thicknesses) than nonhypertensive patients, who in turn had larger changes than controls (septal thickness: HBP-SAHS, 12 [2] mm; non-HBP SAHS, 11 [2] mm, and controls, 9.5 [5] mm; 1 vs. 2, P=.038; 1 vs. 3, P=.0001, 2 vs. 3, P=.034) (posterior wall thickness: HBP-SAHS, 11 [2] mm; non-HBP SAHS, 10 [1] mm, and controls, 9 [1.5] mm; 1 vs. 2, P=.5; 1 vs. 3, P=.0001; 2 vs. 3, P=.001). In addition, there were also greater changes in ventricular filling patterns on the left (HBP-SAHS, 92%; non-HBP SAHS, 72%, controls, 29%; P=.0001) and on the right (HBP-SAHS, 72%; non-HBP SAHS, 58%; controls, 25%; P=.001). There was a trend towards a larger left ventricular Tei index (HBP-SAHS, 0.56 [0.2]; non-HBP SAHS, 0.54 [0.12]; controls, 0.5 [0.1]; 1 vs. 2, P=.8; 1 vs. 3, P=.09; 2 vs. 3, P=.7). Conclusions. From the time of diagnosis, SAHS was associated with left ventricular hypertrophy and impaired biventricular filling, even in the absence of concomitant HBP. The abnormalities observed were more severe when HBP was present (AU)

[Relationship between echocardiographic abnormalities and sleep apnea-hypopnea syndrome severity]. / Alteraciones ecocardiográficas asociadas al síndrome de apnea-hipopnea del sueño en función de su gravedad.

INTRODUCTION AND OBJECTIVES: Sleep apnea-hypopnea syndrome (SAHS) is a prevalent condition that has well-known cardiovascular repercussions. However, few published echocardiographic studies have investigated the abnormalities present at SAHS diagnosis or their relationship with syndrome severity. Our objective was to evaluate myocardial structural, functional and performance parameters in these patients. METHODS: In total, 110 consecutive patients diagnosed with SAHS between June 2005 and 2006 who required treatment with continuous positive airway pressure were divided into two groups according to SAHS severity. Baseline echocardiography was carried out to evaluate structural and functional variables. Findings in the two groups were compared by univariate and multivariate analysis. RESULTS: The patients' mean age was 54 (13) years, their body mass index was 32 (6), 51% had comorbidities, and 74% were male. Patients with severe SAHS (i.e., apnea-hypopnea index [AHI] > or = 30) smoked and drank alcohol more and had larger neck circumferences. There was no significant difference in any structural parameter between the two groups. Functionally, patients with severe SAHS had shorter aortic (AHI<30 277 [4] ms vs AHIé30 263 [4] ms; P=.02) and pulmonary (AHI < 30 287 +/- 5 ms vs. AHI > or = 30 268 +/- 5 ms; P=.01) ejection times, and a higher Tei index (Left: AHI<30 0.51 [0.01] vs AHIé30 0.57 [0.02] [P=.04]; Right: AHI<30 0.38 [0.02] vs AHIé30 0.49 [0.03] [P=.02]). There were correlations between SAHS severity and the right Tei index, and aortic and pulmonary ejection times (P=.0001, P=.01, and P=.0001, respectively). The pulmonary ejection time was an independent predictor of SAHS severity (odds ratio: 0.98, 95% confidence interval, 0.97-0.99; P=.01). CONCLUSIONS: Myocardial performance is poorer in patients with SAHS. The Tei index and ejection times are all associated with SAHS severity. The pulmonary ejection time is an independent predictor of disease severity.

Alteraciones ecocardiográficas asociadas al síndrome de apnea-hipopnea del sueño en función de su gravedad / Relationship between echocardiographic abnormalities and sleep apnea-hypopnea syndrome severity

Introducción y objetivos. El síndrome de apnea-hipopnea del sueño (SAHS) es una enfermedad muy prevalente con repercusiones cardiovasculares conocidas. Sin embargo, son pocos los estudios ecocardiográficos publicados que evalúan estas alteraciones en el momento del diagnóstico y su relación con la gravedad del síndrome. Nuestro objetivo fue analizar parámetros morfológicos, funcionales y de rendimiento miocárdico en estos pacientes. Métodos. Analizamos a 110 pacientes consecutivos diagnosticados, entre junio de 2005 y 2006, de SAHS con indicación de presión positiva continua en la vía aérea (CPAP), divididos en 2 grupos según la gravedad. Realizamos una ecocardiografía basal y analizamos variables morfológicas y funcionales, comparando los resultados entre grupos mediante análisis univariable y multivariable. Resultados. La muestra presentaba una edad media de 54 ± 13 años, un índice de masa corporal de 32 ± 6, una comorbilidad del 51% y un porcentaje de varones del 74%. Los pacientes con SAHS grave (índice apnea-hipopnea [IAH] ≥ 30) presentaron mayor tabaquismo activo, consumo de alcohol y perímetro de cuello. No encontramos diferencias entre grupos al analizar los parámetros morfológicos. En los parámetros funcionales, los pacientes graves presentaron menor tiempo de eyección aórtico (IAH < 30 = 277 ± 4 ms; IAH ≥ 30 = 263 ± 4 ms; p = 0,02) y pulmonar (IAH < 30 = 287 ± 5 ms; IAH ≥ 30 = 268 ± 5 ms; p = 0,01), así como índices de Tei más elevados (izquierdo, IAH < 30 = 0,51 ± 0,01; IAH ≥ 30 = 0,57 ± 0,02; p = 0,04; derecho: IAH < 30 = 0,38 ± 0,02; IAH ≥ 30 = 0,49 ± 0,03; p = 0,02), observándose correlación entre la gravedad del SAHS y el índice de Tei derecho, el período aórtico y el pulmonar (p = 0,0001; p = 0,01; p = 0,0001, respectivamente). El período eyectivo pulmonar fue un predictor independiente de gravedad (odds ratio [OR] = 0,98; intervalo de confianza [IC] del 95%, 0,97-0,99; p = 0,01). Conclusiones. El rendimiento miocárdico esta disminuido en pacientes SAHS. Tanto el índice de Tei como los tiempos de eyección se asocian con gravedad. El tiempo de eyección pulmonar es una variable predictora independiente de gravedad de la enfermedad (AU)

Introducción y objetivos. En pacientes ambulatorios con insuficiencia cardiaca, la anemia es frecuente y se asocia con un aumento de la mortalidad. Estudiamos los determinantes del valor de hemoglobina y su valor pronóstico a medio plazo en una población amplia de pacientes hospitalizados con IC sistólica. Métodos. Se incluyó a 460 pacientes consecutivos (68,3 ± 12,3 años, 74% varones) hospitalizados con el diagnóstico de insuficiencia cardiaca y disfunción sistólica (fracción de eyección del ventrículo izquierdo [FEVI] < 45%). En el momento del alta hospitalaria se realizaron las determinaciones bioquímicas y hematológicas y se recogieron las variables clínicas y ecocardiográficas. Los pacientes fueron seguidos durante 16,8 ± 9,7 meses. Resultados. Un total de 189 (41,1%) pacientes presentaban anemia (según la definición de la Organización Mundial de la Salud). Los determinantes independientes del valor de hemoglobina fueron la edad (riesgo relativo [RR] = 1,035; intervalo de confianza [IC] del 95%, 1,011- 1,060; p = 0,004), el sexo femenino (RR = 1,843; IC del 95%, 1,083-3,135; p = 0,024), diabetes mellitus (RR = 1,413; IC del 95%, 1,087-1,838; p = 0,010), urea plasmática (RR = 1,013; IC del 95%, 1,005-1,022; p = 0,001) y diuréticos del asa (RR = 2,801; IC del 995%, 1,463-5,364; p = 0,002). Un menor valor de hemoglobina se asoció con un mayor riesgo de muerte evento (RR = 1,232; IC del 95%, 1,103-1,375; p < 0,001) y del evento combinado de muerte o reingreso por insuficiencia cardiaca (RR = 1,152; IC del 95%, 1,058-1,255; p < 0,001), pero no de reingreso por insuficiencia cardiaca no fatal (RR = 1,081; IC del 95%, 0,962-1,215; p = 0,265). La transfusión de hematíes durante el ingreso no modificó el incremento del riesgo de muerte (RR = 2,19; IC del 95%, 1,40-3,41, p = 0,001). Conclusiones. En pacientes hospitalizados con IC sistólica, el valor de hemoglobina en el momento del alta es un predictor independiente de mortalidad a medio plazo, pero no de reingresos por IC no fatal. Sus principales determinantes fueron la edad, el sexo, la función renal, la diabetes y la necesidad de diuréticos (AU)

Remoción de arsénico del agua mediante irradiación solar en Lima, Perú

Informa sobre la implementación de la tecnología de remoción de arsénico bajo irradiación solar (RAOS), comparando los resultados con los obtenidos bajo irradiación con luz ultravioleta (UV) de una lámpara