Patient experience in automated peritoneal dialysis with telemedicine monitoring during the COVID-19 pandemic in Mexico: Qualitative study.

AIM: The aim of the study was to understand the experiences of patients on automated peritoneal dialysis (APD) during the period of confinement due to the COVID-19 pandemic. DESIGN: Qualitative exploratory study, phenomenological through semi-structured telephone interview. METHOD: A priori sampling was carried out with patients on APD with remote monitoring and telephone follow-up, in 13 hospitals in Mexico. RESULTS: Twenty-nine informants, mean age 45.41 ± 16.93; 15 women and 14 men. The analysis revealed four categories of analysis: home isolation, clinical follow-up, socioeconomic challenges and infodemic. The experiences of these patients led them to somatize emotions, presenting symptoms such as anxiety, sadness, loneliness, sleep, eating and digestive disorders, situation that sets the tone for future research on telemedicine care models, coping styles, emotional support strategies and socioeconomic impact on patients with chronic home treatments during the pandemic.

Frecuencia de hiponatremia posoperatoria en pacientes sometidos a cirugía mayor en un centro de tercer nivel

Contexto la hiponatremia posoperatoria es una complicación frecuente que se encuentra hasta en el 4 % de los pacientes sometidos a cirugía y que además es un factor independiente de mortalidad intrahospitalaria. Hasta ahora, los estudios se enfocan en las primeras horas posteriores a la cirugía, existiendo poca literatura que abarque hasta el periodo posoperatorio tardío. Objetivo evaluar la frecuencia y las características de hiponatremia en la primera semana posoperatoria. Metodología se incluyeron pacientes sometidos a cirugía mayor durante un periodo de 18 meses. Se determinó el nivel de sodio a las 24 horas, al tercer, quinto y séptimo día del procedimiento. Se clasificó de acuerdo con el tipo de cirugía realizada y se documentó la presencia de datos clínicos y desenlaces de los pacientes. Resultados 280 pacientes fueron estudiados, de los cuales 20 (7,1 %) desarrollaron hiponatremia durante el primer día posoperatorio, 34 (12,1 %) en el tercero, 30 (10,7 %) en el quinto día y 31 (11 %) en el séptimo día. En el primer día posoperatorio, los pacientes sometidos a cirugías urológicas y gastrointestinales desarrollaron hiponatremia con mayor frecuencia. Ninguno de los pacientes desarrolló complicaciones graves y no hubo relación entre la edad, el género o el tipo de soluciones y el desarrollo de hiponatremia. Conclusiones la hiponatremia es una complicación frecuente de varios tipos de procedimientos quirúrgicos que puede desarrollarse en los primeros siete días posoperatorios.

Background Postoperative hyponatremia is a frequent complication that is found in more than 4% of patients undergoing surgery. It is also an independent factor of in-hospital mortality. Until now, previous studies have focused on the first hours after surgery, so there is little information regarding hyponatremia in the late postoperative period. Purpose evaluate the frequency and characteristics of hyponatremia in the first postsurgical week. Methodology Patients undergoing major surgery over a period of 18 months were included. Sodium level was determined at 24 hours, third, fifth and seventh day of the procedure. Hyponatremia was classified according to surgery type and presence of clinical symptoms and outcomes were documented. Results 280 patients were studied. 20 (7.1%) developed hyponatremia on the first postoperative day, 34 (12.1%) on the third, 30 (10.7%) on the fifth day, and 31 (11%) on the seventh day. On the first postoperative day, patients undergoing urological and gastrointestinal surgeries developed hyponatremia more frequently. None of the patients developed serious complications. There was no relationship between age, gender or type of solutions and the development of hyponatremia. Conclusions hyponatremia is a frequent complication of surgical procedures that can develop in the first seven postoperative days.

Evolution of the stage of chronic kidney disease from the diagnosis of hypertension in primary care / Evolución del estadio de la enfermedad renal crónica desde el diagnóstico de hipertensión arterial en atención primaria

Objective: To analyze the evolution of the stages of CKD and the progression of the estimation of glomerular filtration rate (eGFR) in patients with newly diagnosed hypertension. Design-: Retrospective cohort.SiteFamily Medicine Unit No. 31, Mexican Social Security Institute, Mexico City. Participants: Patients with hypertension who have been diagnosed in primary care and have developed chronic kidney disease .Main measurements: The eGFR was calculated with the CKD Epi formula in three moments, the first measurement was at the time of diagnosis of hypertension, the second measurement was made when it arrived a change in CKD stage and the last one at the end of the study, with which the evolution time from one stage to another was obtained, as well as the drop in eGFR. Results: The sample consisted of 207 electronic health records of patients, with an average follow-up of 10.2 years from the moment of diagnosis of hypertension until the end of the study. The average time to go from one baseline stage of CKD to another was 7 years (average decline in eGFR of 5.8ml/min/year) and to have a second stage change was 3.2 years (average decline in eGFR of 6.8ml/min/year), with a statistically significant repeated measures ANOVA (p<0.001). Conclusions: Patients with newly diagnosed hypertension remain longer in the initial stages of CKD, to later evolve and change more quickly.(AU)

Objetivo: Analizar la evolución de los estadios de la enfermedad renal crónica (ERC) y la progresión de la estimación de la tasa de filtración glomerular (eTFG) en pacientes con hipertensión arterial de nuevo diagnóstico. Diseño: Cohorte retrospectiva. Emplazamiento: Unidad de Medicina Familiar N.° 31, Instituto Mexicano del Seguro Social, Ciudad de México. Participantes: Pacientes hipertensos que hayan sido diagnosticados en atención primaria y hayan desarrollado ERC. Mediciones principales: La eTFG se calculó con la fórmula CKD Epi en 3 momentos. La primera medición fue al momento del diagnóstico de hipertensión arterial, la segunda medición se realizó cuando se presentó un cambio de estadio de la ERC y la última, al final del estudio, con el que se obtuvo el tiempo de evolución de un estadio a otro, así como el descenso de la eTFG. Resultados: La muestra estuvo constituida por 207 historias clínicas electrónicas de pacientes, con un seguimiento promedio de 10,2 años desde el momento del diagnóstico de hipertensión arterial hasta el final del estudio. El tiempo promedio para pasar de una etapa inicial de la ERC a otra fue de 7 años (disminución promedio de la eTFG de 5,8ml/min/año) y para tener un cambio de segunda etapa fue de 3,2 años (disminución promedio de la eTFG de 6,8ml/min/año), con un ANOVA de medidas repetidas estadísticamente significativo (p < 0,001). Conclusiones: Los pacientes con hipertensión arterial de nuevo diagnóstico permanecen más tiempo en los estadios iniciales de la ERC, para luego evolucionar y cambiar más rápidamente.(AU)

Evolution of the stage of chronic kidney disease from the diagnosis of hypertension in primary care.

OBJECTIVE: To analyze the evolution of the stages of CKD and the progression of the estimation of glomerular filtration rate (eGFR) in patients with newly diagnosed hypertension. DESIGN: Retrospective cohort. SITE: Family Medicine Unit No. 31, Mexican Social Security Institute, Mexico City. PARTICIPANTS: Patients with hypertension who have been diagnosed in primary care and have developed chronic kidney disease. MAIN MEASUREMENTS: The eGFR was calculated with the CKD Epi formula in three moments, the first measurement was at the time of diagnosis of hypertension, the second measurement was made when it arrived a change in CKD stage and the last one at the end of the study, with which the evolution time from one stage to another was obtained, as well as the drop in eGFR. RESULTS: The sample consisted of 207 electronic health records of patients, with an average follow-up of 10.2 years from the moment of diagnosis of hypertension until the end of the study. The average time to go from one baseline stage of CKD to another was 7 years (average decline in eGFR of 5.8ml/min/year) and to have a second stage change was 3.2 years (average decline in eGFR of 6.8ml/min/year), with a statistically significant repeated measures ANOVA (p<0.001). CONCLUSIONS: Patients with newly diagnosed hypertension remain longer in the initial stages of CKD, to later evolve and change more quickly.

Factors That Influence the Attitude of the Population to Be a Donor in Mexico.

BACKGROUND: Transplantation depends on a donation from a living or deceased donor, with the latter ideally involving a multiorgan transplant. The objective of this study was to determine the factors that influence the attitudes of the population in Mexico toward being a donor. METHODS: We conducted an observational, cross-sectional study with a survey on the attitudes toward donation in the population of Mexico. The survey had 33 items on it regarding sociodemographic aspects and people's positions on the issues of organ and tissue donation. We used central tendency and dispersion averages and calculated the difference between groups using chi squares or the Student t test. We also used the statistical program SPSS version 25. RESULTS: The perception of respondents regarding organ and tissue donation (with 1064 people or 65.1% in favor) points to a lack of knowledge in Mexico. People do not talk about organ donation with their relatives and especially do not discuss their wishes in case of death (only 660 people indicated they had or 40.4%). There is a better attitude toward donation among younger respondents, women, single people, health personnel, people with higher incomes, Catholics, and those who do not have a hospitalized family member. CONCLUSIONS: It is necessary to provide more information about organ donation to people in Mexico. The opinion toward donation is generally favorable; however, there are multiple factors that influence opinions. Family members of patients in intensive care are the least willing to donate themselves or donate a relative's organs.

Abdominal tuberculosis in renal transplant recipient. Presentation of a case and literature review / Tuberculosis abdominal en receptor de trasplante renal. Presentación de un caso y revisión de literatura

Background: Kidney transplantation presents a susceptible point, and is related to infections; tuberculosis is a common and endemic etiology in a country like Mexico, where the most frequent presentation is the respiratory condition, the extrapulmonary is extremely rare and it is derived from immunosuppression conditions. Case report: 33-year-old man with kidney disease of undetermined etiology, kidney transplant in 2003 (donor mother) with adequate evolution; presented with chronic graft nephropathy, with baseline creatinine of 1.8 mg / dL, immunosuppression with prednisone 10 mg every 24 hours, mycophenolate mofetil 500 mg every 8 hours and ciclosporin 100 mg every 12 hours; surgical intervention was performed due to acute abdomen, appendectomy and omentectomy with histopathological finding of tuberculosis, Dotbal, antiproliferative in suspension was started and decrease of calcineurin inhibitor. Adequate kidney function was recovered and maintained as well as control of the infectious disease during the maintenance period. Conclusions: The management of immunosuppression is vital to find the right dose to avoid rejection and allow an immune response to infection, together with antimicrobial treatment.

Introducción: el trasplante renal presenta un punto susceptible y está relacionado con las infecciones; siendo la tuberculosis una etiología común y más en un país endémico como lo es México, siendo la forma de presentación más frecuente la afección respiratoria, lo extrapulmonar es sumamente raro derivado de condiciones de inmunosupresión. Caso clínico: hombre de 33 años de edad, con enfermedad renal de etiología no determinada, trasplantado renal en el año 2003 (madre donadora) con adecuada evolución; se presentó con nefropatía crónica del injerto, con creatinina basal de 1.8 mg/dL, inmunosupresión con prednisona 10 mg cada 24 horas, micofenolato de mofetilo 500 mg cada 8 horas y ciclosporina 100 mg cada 12 horas; se intervino quirúrgicamente por cuadro de abdomen agudo, se realizó apendicetomía y omentectomía con hallazgo histopatológico de tuberculosis, se inició Dotbal, antiproliferativo en suspensión y disminución del inhibidor de calcineurina. Se recuperó y mantuvo adecuada función renal y control del cuadro infeccioso, en periodo de mantenimiento. Conclusiones: el manejo de la inmunosupresión es vital para encontrar la dosis adecuada evitando rechazo, así como permitir una respuesta inmunológica ante la infección, junto con el tratamiento antimicrobiano.

[The pulmonary hypertension of the chronic kidney disease]. / La hipertensión pulmonar de la enfermedad renal crónica.

Pulmonary hypertension in chronic kidney disease is included in the group 5 of the pulmonary hypertension classification of the World Health Organization. Its mechanism is multifactorial and little known. Its importance has increased due to its impact on survival according to whether they received a kidney transplant, the greater risk of early renal graft loss and major hospital stays. In this review, we analyze the panorama of chronic renal disease in Mexico and Latin America, the epidemiology, pathophysiological mechanisms, the diagnostic process and the treatment of pulmonary hypertension in chronic kidney disease.

La hipertensión pulmonar de la enfermedad renal crónica está contemplada en el grupo 5 de la clasificación de hipertensión pulmonar de la Organización Mundial de la Salud. Su mecanismo es multifactorial y poco conocido. Su importancia ha incrementado debido a su impacto en la supervivencia de acuerdo a si el paciente recibió un trasplante renal, al mayor riesgo de pérdida temprana del injerto renal y a las estancias hospitalarias mayores. En esta revisión, se analiza el panorama de la enfermedad renal crónica en México y Latinoamérica, la epidemiología, los mecanismos fisiopatológicos, el proceso diagnóstico y el tratamiento de la hipertensión pulmonar en la enfermedad renal crónica.

Chronic kidney disease / Enfermedad renal crónica

Chronic kidney disease has become very important issue in recent years due, among other factors, to its increasing frequency and the high costs that it generates because it is increasingly seen as a major public health problem associated with premature mortality with important social and economic implications. All this has made advisable not only its diagnosis and early detection, but also increase its degree of knowledge and coordination between different levels of care.

La enfermedad renal crónica ha alcanzado una gran relevancia en los últimos años debido a su creciente frecuencia y a los altos costos que genera, ya que, cada vez más, se aprecia como un importante problema de Salud Pública asociado a una mortalidad prematura con importantes implicaciones sociales y económicas. Todo ello ha hecho aconsejable no solo su diagnóstico y detección precoz, sino también aumentar su grado de conocimiento y coordinación entre distintos niveles asistenciales.

Biomarkers in Chronic Kidney Disease / Biomarcadores en enfermedad renal crónica

Chronic kidney disease (CKD) is an important public health problem. The classification of CKD by KDOQI and KDIGO and routine reports of the estimation of the glomerular filtration rate (eGFR), have resulted in a higher frequency in the diagnosis of CKD. Identification of CKD subjects and high risk of disease progression and cardiovascular disease (CVD) development is important. In clinical practice, proteinuria is the most sensitive marker of the progression of CKD, especially when combined with eGFR, but these have limitations. Therefore, the use of other early and sensitive biomarkers is required. Promising biomarkers are now being identified for the detection of CKD progression and its associated CVD morbidity and mortality. These are sensitive biomarkers of renal function, underlying pathophysiological processes and/or cardiovascular risk.

La enfermedad renal crónica (ERC) es un importante problema de salud pública. La clasificación de la ERC por KDOQI y KDIGO, y los informes rutinarios de la estimación de la tasa de filtración glomerular (eTFG), han dado lugar a una mayor frecuencia en el diagnóstico de ERC. Es importante la identificación de los pacientes con ERC y alto riesgo de progresión de la enfermedad y del desarrollo de enfermedad cardiovascular (ECV). En la práctica clínica, la proteinuria es el marcador más sensible de la progresión de la ERC, especialmente cuando se combina con eTFG, pero, aun con ello, tienen limitaciones. Por lo tanto, se requiere del uso de otros biomarcadores tempranos y sensibles. Actualmente se tienen identificados biomarcadores prometedores para la detección de la progresión de la ERC y de su morbilidad y mortalidad por ECV asociada. Estos son biomarcadores sensibles de la función renal, de los procesos fisiopatológicos subyacentes y/o del riesgo cardiovascular.

Blood pressure rhythmicity in patients with end stage chronic kidney disease: bromocriptine effect / Ritmicidad de la presión arterial en pacientes con enfermedad renal crónica terminal: efecto de bromocriptina

BACKGROUND: The aim of this paper was to characterize the blood pressure CR in patients with end stage chronic kidney disease (ESCKD) before and after treatment with bromocriptine compared to healthy volunteers. METHODS: Fifteen patients and nine healthy volunteers were included. Both groups underwent ambulatory 24 hours blood pressure (24 h ABPM). Patients received 2.5 mg every 8 hours of bromocriptine for eight weeks, at the end of the treatment 24 h ABPM was repeated; blood pressure CR was compared before and after treatment and with healthy volunteers. The CR was identified by the method of Cosinor. RESULTS: 64% of volunteers showed a 24 h CR, against 27% of patients (p < 0.05). After the treatment with bromocriptine 40% of patients showed RC 24 h. The mean arterial pressure decreased from 129 ± 1 mmHg to 106 ± 1 mmHg. A 12 h rhythm was identified in 45% of volunteers and 73% of patients before treatment (p < 0.05) against 60% at the end (p < 0.001), with no statistical difference with volunteers. CONCLUSIONS: The CR in blood pressure is altered in ESCKD and could be restored with bromocriptine. 12 hours rhythmicity was identified predominantly in patients with ESCKD; this rhythm was also present in the healthy volunteers.

INTRODUCCIÓN: el propósito de este estudio es caracterizar el ritmo circadiano (RC) de la presión arterial en pacientes con enfermedad renal crónica terminal (ERCT) en tratamiento con diálisis peritoneal continua ambulatoria (DPCA) antes y después del tratamiento con bromocriptina (BEC) comparándolos con voluntarios sanos. MÉTODOS: se incluyeron 15 pacientes del servicio de Nefrología y 9 voluntarios sanos. Se les realizó monitoreo ambulatorio de presión arterial de 24 horas (MAPA). Los pacientes recibieron 2.5 mg de BEC cada 8 hora durante ocho semanas, al final del tratamiento se repitió el MAPA; el RC de la presión arterial se comparó antes y después del tratamiento y con los voluntarios. Resultados: el 64% de los voluntarios exhibieron RC de 24 horas, frente al 27% de los pacientes (p < 0.05). Después del tratamiento con BEC, el 40% de pacientes mostraron RC de 24 h. El mesor de la presión arterial media disminuyó de 129 ± 1 mmHg a 106 ± 1 mmHg (p < 0.05). Se identificó un ritmo de 12 h en 45% de los voluntarios y en el 73% de los pacientes antes del tratamiento (p < 0.05) frente a 60% al final (p < 0.001), sin diferencia estadística con los voluntarios. CONCLUSIONES: el RC de la presión arterial esta alterado en la IRCT y se restableció con BEC. La ritmicidad de 12 h predominó en los pacientes con ERCT, también presente en los voluntarios sanos.

Left ventricular hypertrophy, fibrosis heart, and diastolic dysfunction in chronic kidney disease / Hipertrofia del ventrículo izquierdo, fibrosis cardiaca y disfunción diastólica en la enfermedad renal crónica

Cardiovascular diseases occur 75 to 80% as causes of morbidity and mortality in patients with chronic kidney disease. In epidemiological studies the causes of cardiovascular deaths are sudden death, arrhythmias, heart failure, coronary arteries disease and myocardial infarction. Heart failure and cardiac arrhythmias are caused mainly by left ventricular hypertrophy and cardiac fibrosis. Pathophysiological factors involved in left ventricular hypertrophy ventricular hypertrophy have been divided into 3 categories: related to afterload, related to preload and not related to afterload or preload. Myocardial hypertrophy induces the activation of cellular apoptosis signals and activates metabolic pathways able to increase extracellular matrix production up to fibrosis. Fibrosis leads to progressive impairment in contractility with stiffening of myocardial wall, diastolic and systolic dysfunction and finally dilated cardiomyopathy with congestive heart failure. The main of this review is to understand the pathophysiology of left ventricular hypertrophy, cardiac fibrosis and diastolic dysfunction.

Las enfermedades cardiovasculares se presentan del 75al 80% como causas de morbimortalidad en pacientes con enfermedad renal crónica. En estudios epidemiológicos, las causas más frecuentes de muerte cardiovascular son: muerte súbita, arritmias, falla cardiaca, enfermedad arterial coronaria e infarto del miocardio. La insuficiencia cardiaca y las arritmias cardiacas son causadas por la hipertrofia del ventrículo izquierdo y la fibrosis cardiaca. Los factores fisiopatológicos involucrados en la hipertrofia del ventrículo izquierdo se dividen en 3 categorías: relacionado a la poscarga, relacionado a la precarga y los no relacionados ni a la poscarga, ni a la precarga. La hipertrofia miocárdica induce la activación de señales de apoptosis celular y activa las vías metabólicas capaces de aumentar la producción de matriz extracelular hasta fibrosis. La fibrosis conduce al deterioro progresivo de la contractilidad y al engrosamiento de la pared del miocardio, causando disfunción diastólica, sistólica y miocardiopatía dilatada con insuficiencia cardiaca congestiva. El objetivo de esta revisión es conocer la fisiopatología de la hipertrofia del ventrículo izquierdo, de la fibrosis cardiaca y de la disfunción diastólica en la enfermedad renal crónica.

Structural and functional cardiac abnormalities during chronic kidney disease / Alteraciones en la estructura y función cardíaca durante la enfermedad renal crónica

Cardiovascular diseases are the leading cause of death in people with chronic kidney disease (CKD). These involve the whole structure and function of the heart, so the clinical presentation varies from chronic heart failure to arrhythmias and even sudden death, having a significant impact on the patient's quality of life and a high cost for health services. The origin of these cardiovascular alterations is ample, involving the traditional and non-traditional cardiovascular risk factors, as well as systemic changes that cause the progressive loss of the glomerular filtration rate. The identification of cardiovascular alterations during the course of the CKD has become important in the clinical setting, and there is a wide field of research regarding treatment interventions, many of which have not been fully established up to date.

La principal causa de muerte en la población con enfermedad renal crónica (ERC) se debe a causas cardiovasculares; estas alteraciones involucran a toda la estructura y función del corazón, de tal forma que la presentación clínica varía desde un cuadro de insuficiencia cardiaca crónica, hasta arritmias y muerte súbita, con un impacto significativo en la calidad de vida del enfermo y un alto costo para los servicios de salud. El origen de estas alteraciones es basto e intervienen en su generación los factores tradicionales y no tradicionales de riesgo cardiovascular, así como los cambios sistémicos que ocasiona la pérdida progresiva de la tasa de filtración glomerular. La identificación de las alteraciones cardiovasculares durante el transcurso de la ERC ha tomado importancia en la atención clínica del enfermo, y existe un amplio campo de investigación en lo que se refiere a las intervenciones de tratamiento, muchas de las cuales, al momento actual, no se encuentran totalmente establecidas.

[Consensus on Systemic Arterial Hypertension In México]. / Consenso de Hipertensión Arterial Sistémica en México.

This Consenso Nacional de Hipertensión Arterial Sistémica (National Consensus on Systemic Arterial Hypertension) brings together experiences and joint work of 79 specialists who have been in contact with the patient affected by systemic arterial hypertension. All concepts here presented were outlined on the basis of the real world practice of Mexican hypertensive population. The consensus was developed under strict methodological guidelines. The Delphi technique was applied in two rounds for the development of an appropriate statistical analysis of the concepts exposed by all the specialists, who posed key questions, later developed by the panel of experts of the Hospital de Cardiología, and specialists from the Centro Médico Nacional. Several angles of this illness are shown: detection, diagnosis, pathophysiology, classification, treatment and prevention. The evidence analysis was carried out using PRISMA method. More than 600 articles were reviewed, leaving only the most representative in the references. This document concludes with practical and useful recommendations for the three levels of health care of our country.

Este Consenso Nacional de Hipertensión Arterial Sistémica reúne las experiencias y el trabajo conjunto de 79 especialistas que han estado en contacto con el paciente que padece hipertensión arterial sistémica. Todos los conceptos aquí presentados se plantearon con base en la práctica del mundo real de la población hipertensa de México. El consenso se desarrolló bajo lineamientos metodológicos estrictos. La técnica de Delphi se aplicó en dos vueltas para el desarrollo de un análisis estadístico apropiado de los conceptos vertidos por todos los especialistas con preguntas clave que desarrolló el panel de expertos del Hospital de Cardiología y especialistas del Centro Médico Nacional. Se presentan los aspectos de detección, diagnóstico, fisiopatología, clasificación, tratamiento y prevención. El análisis de la evidencia en la literatura se hizo utilizando el método de PRISMA para análisis de evidencia. Se revisaron más de 600 artículos y se dejaron en la bibliografía solo los más representativos. Este documento concluye con recomendaciones prácticas y de utilidad para los tres niveles de atención en salud de nuestro país.

[Treatment of hypertension in chronic kidney disease]. / Tratamiento de la hipertensión arterial en la enfermedad renal crónica.

Systemic arterial hypertension (SAH) is a progressive cardiovascular syndrome caused by complex and interrelated causes. The early markers of this syndrome are often present even before the blood pressure (BP) elevation; therefore, SAH cannot only be classified by the BP elevation threshold, which sometimes is discreet. Its progression is strongly associated with structural and functional cardiovascular abnormalities, which lead to end-organ damage (heart, kidney, brain, blood vessels and other organs), and cause premature morbidity and death. In this sense, the BP is only a biomarker of this cardiovascular syndrome, which is why it is more useful to consider individual BP patterns of the ill patient rather than a single BP threshold. The study and treatment of hypertension in chronic kidney disease (CKD) has made some progresses, especially in patients requiring dialysis. The use of non-invasive technology to register the BP has reconfigured health care of patients in regards to the diagnosis, circadian pattern, clinical surveillance, pharmacological prescription, prognosis, and risk of cardiovascular events (as well as mortality). The opportunity in the diagnosis and treatment means a delay in the onset of complications and, also, of dialysis. The blockade of the renin-aldotensin-aldosterone system (RAAS), a regular monitoring of the dry weight of the population in dialysis, and non-pharmacological interventions to modify lifestyle are the maneuvers with greater impact on the morbidity and mortality of patients.

La hipertensión arterial (HTA) es un síndrome cardiovascular progresivo que es ocasionado por etiologías complejas e interrelacionadas. Los marcadores tempranos del síndrome frecuentemente están presentes antes de que se eleve la presión arterial (PA); por lo tanto, la HTA no puede ser solamente clasificada por el umbral de elevación de la PA. Su progresión está fuertemente asociada con anormalidades estructurales y funcionales de la función cardiaca y vascular que dañan el corazón, el riñón, el cerebro, los vasos sanguíneos y otros órganos, y provocan morbilidad y muerte prematuras. Así, la PA es solamente un biomarcador de este síndrome cardiovascular, por lo que es de mayor utilidad considerar los patrones individuales de PA del enfermo en vez de un umbral de PA único. El estudio y tratamiento de la HTA en la enfermedad renal crónica (ERC) ha tenido avances, sobre todo en la población en diálisis. El uso de tecnología no invasiva para registrar la PA ha permitido reformar la atención médica de los enfermos en cuanto al diagnóstico, patrón circadiano, vigilancia clínica, prescripción farmacológica, pronóstico y riesgo de eventos cardiovasculares. La oportunidad en el diagnóstico y tratamiento supone un retardo en la aparición de complicaciones y en el inicio de la diálisis. El bloqueo del sistema renina-angiotensina-aldosterona (SRAA), la vigilancia periódica del peso seco en la población en diálisis y las intervenciones para modificar el estilo de vida son las maniobras con mayor impacto en la morbimortalidad de los enfermos.

[Factors related to residual renal function loss in patients in peritoneal dialysis]. / Factores relacionados con pérdida de la función renal residual en pacientes en diálisis peritoneal.

BACKGROUND: Residual renal function (RRF) contributes to the quality of life of patients on dialysis. The preservation of RRF is associated with higher patient survival in peritoneal dialysis (PD), and is now accepted that RRF and peritoneal clearance are not of equal value in patient survival. The aim of this study is to know the factors related to RRF loss in prevalent patients in continuous ambulatory peritoneal dialysis (CAPD). METHODS: This is an analysis of secondary outcomes. Forty-three adult patients with type 2 diabetes were included. They had RRF preserved. Clinical and laboratory assessments were done in each visit during a year. RESULTS: The male gender (p = 0.042), systolic (p = 0.009) and diastolic (p = 0.006) blood pressure (BP), hemoglobin (p = 0.008), peritoneal creatinine clearance (p = 0.014), peritoneal ultrafiltration (p = 0.017) and levels of tumor necrosis factor-alpha (TNF-alpha) in plasma (p = 0.022) and dialysate (p = 0.008) were related with RRF loss. CONCLUSIONS: It is important to understand the factors associated with RRF loss in our patients to prevent the gradual loss and its implications on the mortality and quality of life.

Introducción: la conservación de la función renal residual (FRR) en los pacientes en diálisis peritoneal (DP) tiene una clara influencia sobre la calidad de vida, independientemente de que su preservación ha demostrado influir en la mayor supervivencia de los pacientes. El objetivo del presente estudio fue conocer los factores relacionados con pérdida de la FRR en un grupo de pacientes prevalentes en diálisis peritoneal continua ambulatoria (DPCA). Métodos: se trata de un estudio de análisis de resultados secundarios. Se incluyeron 43 adultos con diabetes tipo 2 (DT2), con FRR conservada, a quienes se les dio seguimiento durante un año. Resultados: los factores relacionados con la pérdida de la FRR fueron: género masculino (p = 0.042), presión arterial sistólica (p = 0.009) y diastólica (p = 0.006), hemoglobina (p = 0.008), aclaramiento peritoneal de creatinina (p = 0.014), ultrafiltración (p = 0.017), niveles de factor de necrosis tumoral alfa (FNT­alfa) en plasma (p = 0.022) y dializado (p = 0.008). Conclusiones: es importante conocer los factores relacionados con pérdida de la FRR en nuestros pacientes para evitar la pérdida gradual de la misma y sus implicaciones sobre la mortalidad y calidad de vida.

Inflammation and myocardial damage markers influence loss of residual renal function in peritoneal dialysis patients.

BACKGROUND: Residual renal function (RRF) has been identified as the most important component in dialysis adequacy and has a strong effect on clinical outcomes. This justifies any effort in understanding the mechanism behind the preservation or decline in RRF. The aim of this study was to analyze the possible association of components of cardio-renal syndrome with the rate of decline in RRF. METHODS: A retrospective cohort study was performed in a group of prevalent adult patients on continuous ambulatory peritoneal dialysis (CAPD). Patients were analyzed at baseline and after a 30-month follow-up. Evaluations included measurements of residual renal function, dialysis adequacy parameters, cardiovascular comorbidity, and measurements of biochemical markers of cardiovascular disease (CVD) and inflammation, as well as resting electrocardiography. RESULTS: We included 129 patients in the study who were divided into groups according to loss of RRF, considering the cut-off point as 100 mL/day of 24 h urine volume. At baseline, there were no differences between groups: patients who lost RRF showed low values of 24 h urine volume, higher levels of systolic blood pressure, N-terminal pro-brain natriuretic peptide (NT-proBNP), C-reactive protein (CRP), IL-6, and low values of serum albumin. In the multivariate analysis, age, albumin, CRP, and NT-proBNP were significant risk factors for the loss of RRF. CONCLUSIONS: Data indicate a close relationship between heart and kidney function where chronic kidney disease (CKD) affects and is an effect of, heart function, indicative of a bi-directional influence that leads to a vicious cycle, promoting deleterious effects on both systems.

Bromocriptine induces regression of left ventricular hypertrophy in peritoneal dialysis patients.

Left ventricular hypertrophy (LVH) prevalence is very high in end stage renal disease (ESRD). It's a predictor of cardiac death in peritoneal dialysis patients. Noradrenalin, Angiotensin II and aldosterone are involved incardiac hypertrophy. Dopamine, acting at DA2 receptors inhibits norephinephrin release, antagonizes aldosterone and down-regulates AT1 receptor numbers, suggesting that DA2 agonists, like bromocriptine (BEC) could regress LVH. The objective of this study was to evaluate the changes in left ventricular mass in patients with ESRD in continuous ambulatory peritoneal dialysis (CAPD), by adding BEC to the treatment. An open clinical trial was conducted. Twenty patients were enrolled. Five formed the control group. Fifteen patients in the experimental group received BEC 2.5 mg three times daily over three months. M mode echocardiography and prolactin plasma levels were measured at the beginning and at the end of the study. The statistical analysis was performed using Student t test. The echocardiography reports showed a 24.4% decreased in left ventricular mass index (LVMI); the interventricular septum decreased 11.3%, the ejection fraction was not modified. The control group showed no difference. BEC-mediated decreases in left-ventricular mass in LVH patients on dialysis suggest that Dopaminergic agonists could be useful in caring for patients with ESRD and LVH.