Síndrome de QT largo congénito y bradicardia fetal: la importancia del diagnóstico / Congenital long QT syndrome and fetal bradycardia: the importance of the diagnosis

Antecedentes: El síndrome de QT largo es una canalopatía que afecta a la repolarización ventricular y aumenta el riesgo de sufrir arritmias ventriculares graves. Puede ser congénito o adquirido, y es una causa conocida de muerte súbita. Caso clínico: Gestante primigesta, de 28 años, sin antecedentes de interés. En ecografías prenatales se objetivó en el feto bradicardia sinusal mantenida desde la semana 28, sin repercusión hemodinámica, que persistió hasta la finalización de la gestación (semana 37+3). Al nacimiento se realizaron electrocardiogramas seriados que mostraron alteraciones en la repolarización con alargamiento del intervalo QT corregido. Se realizó estudio genético que confirmó síndrome de QT largo tipo 1 y se inició tratamiento oral con beta-bloqueantes, con buena respuesta. Conclusiones: El síndrome de QT largo suele diagnosticarse posnatalmente. Es importante conocer sus características clínicas prenatales para poder establecer un diagnóstico precoz y minimizar así el riesgo de muerte súbita de estos pacientes.

Background: Long QT syndrome is a channelopathy that affects ventricular repolarization and increases the risk of severe ventricular arrhythmias. It can be congenital or acquired, and is a known cause of sudden cardiac death. Case report: A 28-year-old primigravida with no significant medical history. Prenatal ultrasounds revealed sustained fetal sinus bradycardia from week 28, without hemodynamic repercussion, which persisted until the end of gestation (at 37+3 weeks). Serial electrocardiograms were performed after birth, showing repolarization abnormalities with prolonged corrected QT interval. A genetic study confirmed long QT syndrome type 1, and oral treatment with beta-blockers was initiated, showing a positive response. Conclusions: Long QT syndrome is often diagnosed postnatally. It is important to be aware of his prenatal clinical features in order to establish an early diagnosis and minimize the risk of sudden death in these patients.

Intrauterine Transfusion for Rhesus Alloimmunization: A Historical Retrospective Cohort from A Single Reference Center in Brazil.

Objective: This study aimed to describe the historical experience of a single reference center in Brazil with intrauterine transfusion (IUT) for Rhesus (Rh) alloimmunization, evaluating the major complications and the perinatal outcomes of this procedure. Methods: This retrospective cohort study evaluated data from medical records of pregnant women between 20 and 34 weeks of gestation whose fetuses underwent IUT by cordocentesis between January 1991 and June 2021. The same experienced examiner performed all procedures. Univariate and multivariate logistic regression was used to assess the effect of fetal hydrops, duration of IUT, post-transfusion cord bleeding time, and bradycardia on death (fetal or neonatal). Results: We analyzed data from 388 IUTs in 169 fetuses of alloimmunized pregnant women with a mean age of 29.3 ± 5.1 years. Death and fetal hydrops were significantly associated at first IUT (p < 0.001). We had two cases of emergency cesarean section (mean of 0.51% per IUT) and three cases of premature rupture of the ovular membranes (mean of 0.77% per procedure). Thirty-six deaths were recorded, including 14 intrauterine and 22 neonatal. A higher percentage of neonatal deaths was observed in the group with post-transfusion cord bleeding time > 120 s (45.8%). The odds of neonatal death were 17.6 and 12.9 times higher in cases with hydrops and bradycardia than in cases without hydrops and bradycardia, respectively. The odds of death (fetal and neonatal) were 79.9 and 92.3 times higher in cases with hydrops and bradycardia than in cases without hydrops and bradycardia, respectively. Conclusions: The most common complications of IUT for Rh alloimmunization were post-transfusion cord bleeding, fetal bradycardia, premature rupture of ovular membranes, and emergency cesarean section. The IUT complication most associated with death (fetal and neonatal) was bradycardia, and the perinatal outcomes were worse in fetuses with hydrops.

Apnea, Intermittent Hypoxemia, and Bradycardia Events Predict Late-Onset Sepsis in Infants Born Extremely Preterm.

OBJECTIVE: The objective of this study was to examine the association of cardiorespiratory events, including apnea, periodic breathing, intermittent hypoxemia (IH), and bradycardia, with late-onset sepsis for extremely preterm infants (<29 weeks of gestational age) on vs off invasive mechanical ventilation. STUDY DESIGN: This is a retrospective analysis of data from infants enrolled in Pre-Vent (ClinicalTrials.gov identifier NCT03174301), an observational study in 5 level IV neonatal intensive care units. Clinical data were analyzed for 737 infants (mean gestational age: 26.4 weeks, SD 1.71). Monitoring data were available and analyzed for 719 infants (47 512 patient-days); of whom, 109 had 123 sepsis events. Using continuous monitoring data, we quantified apnea, periodic breathing, bradycardia, and IH. We analyzed the relationships between these daily measures and late-onset sepsis (positive blood culture >72 hours after birth and ≥5-day antibiotics). RESULTS: For infants not on a ventilator, apnea, periodic breathing, and bradycardia increased before sepsis diagnosis. During times on a ventilator, increased sepsis risk was associated with longer events with oxygen saturation <80% (IH80) and more bradycardia events before sepsis. IH events were associated with higher sepsis risk but did not dynamically increase before sepsis, regardless of ventilator status. A multivariable model including postmenstrual age, cardiorespiratory variables (apnea, periodic breathing, IH80, and bradycardia), and ventilator status predicted sepsis with an area under the receiver operator characteristic curve of 0.783. CONCLUSION: We identified cardiorespiratory signatures of late-onset sepsis. Longer IH events were associated with increased sepsis risk but did not change temporally near diagnosis. Increases in bradycardia, apnea, and periodic breathing preceded the clinical diagnosis of sepsis.

Atropine does not prevent hypoxemia and bradycardia in tracheal intubation in the pediatric emergency department: observational study / O uso da atropina não previne hipoxemia e bradicardia na intubação traqueal no departamento de emergência pediátrica: estudo observacional

ABSTRACT Objective: The benefit of atropine in pediatric tracheal intubation is not well established. The objective of this study was to evaluate the effect of atropine on the incidence of hypoxemia and bradycardia during tracheal intubations in the pediatric emergency department. Methods: This is a single-center observational study in a tertiary pediatric emergency department. Data were collected on all tracheal intubations in patients from 31 days to incomplete 20 years old, performed between January 2016 and September 2020. Procedures were divided into two groups according to the use or not of atropine as a premedication during intubation. Records with missing data, patients with cardiorespiratory arrest, cyanotic congenital heart diseases, and those with chronic lung diseases with baseline hypoxemia were excluded. The primary outcome was hypoxemia (peripheral oxygen saturation ≤88%), while the secondary outcomes were bradycardia (decrease in heart rate >20% between the maximum and minimum values) and critical bradycardia (heart rate <60 bpm) during intubation procedure. Results: A total of 151 tracheal intubations were identified during the study period, of which 126 were eligible. Of those, 77% had complex, chronic underlying diseases. Atropine was administered to 43 (34.1%) patients and was associated with greater odds of hypoxemia in univariable analysis (OR: 2.62; 95%CI 1.15-6.16; p=0.027) but not in multivariable analysis (OR: 2.07; 95%CI 0.42-10.32; p=0.37). Critical bradycardia occurred in only three patients, being two in the atropine group (p=0.26). Bradycardia was analyzed in only 42 procedures. Atropine use was associated with higher odds of bradycardia in multivariable analysis (OR: 11.00; 95%CI 1.3-92.8; p=0.028). Conclusions: Atropine as a premedication in tracheal intubation did not prevent the occurrence of hypoxemia or bradycardia during intubation procedures in pediatric emergency.

RESUMO Objetivo: Avaliar o efeito da atropina na incidência de hipoxemia e bradicardia durante a intubação orotraqueal no departamento de emergência pediátrica. Métodos: Estudo observacional, realizado em departamento de emergência pediátrica terciário em que foram analisados os registros de intubações orotraqueais de pacientes com 31 dias a 20 anos incompletos, entre janeiro de 2016 e setembro de 2020. Os procedimentos foram divididos em dois grupos de acordo com o uso ou não da atropina como pré-medicação durante a intubação. Foram excluídos os procedimentos com falhas no preenchimento dos dados, pacientes com parada cardiorrespiratória, cardiopatias congênitas cianóticas, e aqueles com pneumopatias crônicas com hipoxemia basal. O desfecho primário foi hipoxemia (saturação periférica de oxigênio ≤88%), enquanto os desfechos secundários foram bradicardia (queda >20% entre a frequência cardíaca máxima e mínima) e bradicardia crítica (frequência cardíaca <60 bpm) durante o procedimento de intubação Resultados: Foram identificados 151 procedimentos de intubação orotraqueal, sendo 126 elegíveis para o estudo. Desses, 77% tinham doenças subjacentes complexas e crônicas. A atropina foi administrada em 43 (34,1%) pacientes e foi associada a maiores chances de hipoxemia na análise univariada (OR: 2,62; IC95% 1,15-6,16; p=0,027), porém, não na análise multivariada (OR: 2,073; IC95% 0,416-10,32; p=0,373). A bradicardia crítica ocorreu em apenas três pacientes, sendo dois no grupo atropina (p=0,268). A bradicardia foi analisada em apenas 42 procedimentos. O uso de atropina foi associado a maior probabilidade de bradicardia (OR: 11,00; IC95% 1,3-92,8; p=0,028) na análise multivariável. Conclusões: Atropina como pré-medicação na intubação orotraqueal não evitou a ocorrência de hipoxemia ou bradicardia durante os procedimentos de intubação na emergência pediátrica.

Burden of bradycardia and barriers to accessing bradycardia therapy in underserved countries.

Bradycardia, a condition characterized by an abnormally slow heart rate, poses significant challenges in terms of diagnosis and treatment. While it is a concern world-wide, low- and middle-income countries (LMICs) face substantial barriers in accessing appropriate bradycardia therapy. This article aims to explore the global aetiology and incidence of bradycardia, compare the prevalence and management of the condition in high-income countries versus LMICs, identify the key reasons behind the disparities in access to bradycardia therapy in LMICs, and emphasize the urgent need to address these disparities to ensure equitable healthcare on a global scale.

Bradycardia May Decrease Cardiorespiratory Coupling in Preterm Infants.

Bradycardia, frequently observed in preterm infants, presents significant risks due to the immaturity of their autonomic nervous system (ANS) and respiratory systems. These infants may face cardiorespiratory events, leading to severe complications like hypoxemia and neurodevelopmental disorders. Although neonatal care has advanced, the influence of bradycardia on cardiorespiratory coupling (CRC) remains elusive. This exploratory study delves into CRC in preterm infants, emphasizing disparities between events with and without bradycardia. Using the Preterm Infant Cardio-Respiratory Signals (PICS) database, we analyzed interbeat (R-R) and inter-breath intervals (IBI) from 10 preterm infants. The time series were segmented into bradycardic (B) and non-bradycardic (NB) segments. Employing information theory measures, we quantified the irregularity of cardiac and respiratory time series. Notably, B segments had significantly lower entropy values for R-R and IBI than NB segments, while mutual information was higher in NB segments. This could imply a reduction in the complexity of respiratory and cardiac dynamics during bradycardic events, potentially indicating weaker CRC. Building on these insights, this research highlights the distinctive physiological characteristics of preterm infants and underscores the potential of emerging non-invasive diagnostic tools.

Long-Term Outcome of Cardiac Denervation Procedures: The Anatomically Guided Septal Approach.

BACKGROUND: Functional bradycardia is a challenging condition that affects a healthy population. Ganglionated plexus ablation has emerged as a therapeutic alternative to avoid a pacemaker. OBJECTIVES: The purpose of this study is to evaluate long-term effects of anatomically guided cardiac denervation. METHODS: This is a prospective longitudinal study that included 36 patients with symptomatic functional bradycardia. Electroanatomic reconstruction of both atria was carried out, and the main septal ganglionated plexi were anatomically located and targeted. RESULTS: Ablation endpoints were: 1) heart rate increment; 2) Wenckebach cycle length shortening; and 3) atrio-Hisian (AH) interval shortening. A sinus node denervation was obtained in all patients with an increment of 21.6% in the mean heart rate. All patients presented a negative atropine test after ablation. Twenty-eight (77.7%) patients presented immediate sings of atrioventricular node denervation, with a shortening of 15.6% of mean Wenckebach cycle length and 15.9% of the mean AH interval. All heart rate variability parameters showed a significant reduction after 12 months, enduring after 18 months. Thirty (83.3%) patients remained free of events after a mean follow-up of 52.1 ± 35.2 months. One patient (2.77%) presented acute sinus node artery occlusion during ablation with persistent sinus dysfunction and had a pacemaker implantation; 3 (8.3%) other patients evolved with sinus tachycardia, and 4 (11.1%) patients presented syncope recurrence during follow-up, 3 (8.3%) of them requiring a pacemaker implantation. No other tachyarrhythmia was observed. CONCLUSIONS: The anatomically guided septal approach is an effective technique for syncope prevention, promoting long-lasting autonomic changes. No significant proarrhythmia effect has been observed during the long-term follow-up.

Cardioneuroablation: Where are we at?

Since its original description in 2005, catheter ablation techniques, commonly called cardioneuroablation, have emerged as a potential strategy for modulating autonomic function. Multiple investigators have provided observational data on the potential benefits of this technique in a variety of conditions associated with or exacerbated by increased vagal tone such as vasovagal syncope, functional atrioventricular block, and sinus node dysfunction. Patient selection, current techniques including the various mapping strategies, clinical experience, and limitations of cardioablation are reviewed. Finally, while cardioneuroablation has potential to be a treatment option for selected patients with symptoms mediated by hypervagotonia, the document outlines the important knowledge gaps that currently exist and the necessary next steps required before this technique can be widely implemented into clinical practice.

Pilot Study of Inclined Position and Infant Gastroesophageal Reflux Indicators.

To reduce gastroesophageal reflux, infants are commonly placed in an inclined position. We sought to observe the extent to which infants exhibit (1) oxygen desaturation and bradycardia in supine and inclined positions and (2) signs and symptoms of post-feed regurgitation in these positions. Study Design: Healthy infants aged 1-5 months with gastroesophageal reflux disease (GERD) (N = 25) and controls (N = 10) were enrolled into one post-feed observation. Infants were monitored in a prototype reclining device for consecutive 15-minute periods in supine position with head elevations of 0°, 10°, 18°, and 28° in random order. Continuous pulse oximetry assessed hypoxia (O2 saturation <94%) and bradycardia (heart rate <100). Regurgitation episodes and other symptoms were recorded. Mothers assessed comfort using an ordinal scale. Incident rate ratios were estimated using Poisson or negative binomial regression models. Results: Among infants with GERD, in each position, most had no episodes of hypoxia, bradycardia, or regurgitation. Overall, 17 (68%) infants had 80 episodes of hypoxia (median 20 seconds duration), 13 (54%) had 33 episodes of bradycardia (median 22 seconds duration), and 15 (60%) had 28 episodes of regurgitation. For all 3 outcomes, incident rate ratios were not significantly different between positions, and no differences were discovered for observed symptoms or infant comfort. Conclusions: Brief episodes of hypoxia and bradycardia as well as observed regurgitation are common for infants with GERD placed in the supine position after a feed with no differences in outcomes at various degrees of head elevation. These data may be used to power future, larger, and longer evaluations. ClinicalTrials.gov Identifier: NCT04542239.

Síndrome HELLP y rotura hepática en un embarazo gemelar: presentación de un caso / HeLLP Syndrome and Hepatic Rupture in a Twin Pregnancy: A Case Report / Síndrome HeLLP e ruptura hepática em gestação gemelar: relato de caso

Introducción: el síndrome HELLP y rotura hepática es una complicación poco frecuente, especialmente en casos de embarazo gemelar. Se presenta el caso de un hematoma subcapsular hepático roto por síndrome HELLP que complicó un embarazo gemelar que requirió una cesárea de emergencia y para el manejo de la hipovolemia, el empaquetamiento hepático. Presentación del caso: mujer de 41 años, con gestación gemelar de 35 semanas, quien acudió al servicio de emergencia, por contracciones uterinas y ausencia de movimientos fetales. Ante una bradicardia severa de ambos fetos, se optó por una cesárea de urgencia. Al abrir la cavidad abdominal, se encontró hemoperitoneo y se logró extraer ambos fetos vivos. Se realizó una laparotomía media, supra e infraumbilical exploradora (poscesárea) y se halló una rotura hepática del lóbulo derecho. Se procedió a un empaquetamiento hepático con compresas y cierre temporal abdominal; entre tanto, el manejo del shock hipovolémico y la preeclampsia se continuó en la unidad de cuidados intensivos. La paciente se fue de alta en buenas condiciones a los 21 días. Conclusión: el síndrome HELLP produce complicaciones graves, como rotura hepática, que si no es tratada de forma correcta, temprana y multidisciplinaria, puede llevar a producir mortalidad materno-perinatal.

Introduction: HELLP syndrome and hepatic rupture are rare complications, especially in the case of twin pregnancy. Here, we present a case of ruptured hepatic subcapsular hematoma due to HELLP syndrome that caused complication in a twin pregnancy. This case required emergency Cesarean section and management of hypo- volemia hepatic packing. Case presentation: A 41-year-old female pregnant with twins (35 weeks) came to the emergency room for uterine contractions and absence of fetal movements. Due to severe bradycardia in both fetuses, emergency Cesarean section was performed. When the abdominal cavity was opened, hemoperitoneum was found, and both fetuses were extracted alive. A median, supra-, and infraumbilical exploratory laparotomy (post Cesarean section) was performed, and right lobe hepatic rupture was found. Subsequently, hepatic packing with compression and temporary abdominal closure was performed. Hypovolemic shock and preeclampsia was continuously managed in the intensive care unit. At 21 days, the patient was discharged in good condition. Conclusion: HELLP syndrome causes serious complications, such as hepatic rupture, which may lead to maternal and perinatal mortality if not correctly treated early in a multidisciplinary manner.

Introdução: a síndrome HELLP e a ruptura hepática são complicações raras, especialmente em casos de gravidez gemelar. Neste artigo, apresentamos o caso de um hematoma subcapsular hepático rompido devido à síndrome HELLP que complicou uma gravidez gemelar que exigiu uma cesariana de emergência e tamponamento hepático para o manejo da hipovolemia. Apresentação do caso: mulher, 41 anos, gestação gemelar de 35 semanas, recorre ao pronto-socorro por contrações uterinas e ausência de movimentos fetais. Devido à bradicardia grave em ambos os fetos, foi decidida uma cesariana de emergência. Ao abrir a cavidade abdominal o hemoperitônio é localizado, sendo possível extrair ambos os fetos vivos. Foi realizada laparotomia exploradora mediana, supra e infraumbilical (pós-cesariana) sendo constatada ruptura hepática do lobo direito. Foi realizado tamponamento hepático com compressas e fechamento abdominal temporário, e o manejo do choque hipovolêmico e da pré-eclâmpsia foi mantido na Unidade de Terapia Intensiva, onde a paciente recebeu alta em boas condições após 21 dias. Conclusão: a síndrome HELLP produz complicações graves como a ruptura hepática que, se não tratada de forma precoce e multidisciplinar, pode levar à mortalidade materna perinatal.

Bradycardia in a pediatric population after sugammadex administration: case series

Abstract Sugammadex is a distinctive neuromuscular reversal drug that acts by encapsulating the neuromuscular relaxant molecule and dislodging it from its site of action. Sugammadex has been approved for pediatric patients over 2 years of age. Although arrhythmias have been reported, there is no report of adverse effects in healthy children, such as severe bradycardia requiring intervention. We report two cases of severe bradycardia immediately after the administration of sugammadex in healthy children. Our aim is to alert to the occurrence of one of the most severe adverse effects of sugammadex, in the healthy pediatric population as well.

Cardiovascular effects of hyoscine butylbromide in patients under general anaesthesia.

BACKGROUND: Cardiovascular effects for drugs such as hyoscine butylbromide are poorly documented in the literature, unlike atropine, which is considered the antimuscarinic of choice in the presence of intraoperative bradycardia. AIM: The aim of the study was to describe the dose-related cardiovascular effect of hyoscine butylbromide in patients between 18 and 65 years of age, with low perioperative risk undergoing elective surgery under general anaesthesia on an outpatient basis or hospitalised at our institution between 1 January and 31 May 2019. METHODS: Descriptive, cross-sectional, retrospective study; 28 patients with low perioperative risk who underwent general anaesthesia were selected. Changes in heart rate and blood pressure were analysed during the first 6 minutes after the administration of hyoscine butylbromide. The data obtained was recorded in a Microsoft Excel database and analysed using the Excel analysis tool and IBM SPSS. RESULTS: The average dose of 0.15mg/kg of hyoscine butylbromide achieved an increase in heart rate and mean arterial pressure in 96% and 92.8%, respectively, in the first 6 minutes after the administration. Significant changes in heart rate and blood pressure were obtained during the first 6 minutes at doses between 0.05mg/kg and 0.15mg/kg. CONCLUSION: Hyoscine butylbromide generates positive effects on the heart rate and blood pressure of patients under general anaesthesia, representing a possible alternative in the management of intraoperative bradycardia.

Bradycardia in a pediatric population after sugammadex administration: case series.

Sugammadex is a distinctive neuromuscular reversal drug that acts by encapsulating the neuromuscular relaxant molecule and dislodging it from its site of action. Sugammadex has been approved for pediatric patients over 2 years of age. Although arrhythmias have been reported, there is no report of adverse effects in healthy children, such as severe bradycardia requiring intervention. We report two cases of severe bradycardia immediately after the administration of sugammadex in healthy children. Our aim is to alert to the occurrence of one of the most severe adverse effects of sugammadex, in the healthy pediatric population as well.

Caracterización del dengue con bradicardia en adolescentes

Introducción: El dengue es una enfermedad infecto contagiosa de variada intensidad, oriunda de climas tropicales como los que predominan en la región de las Américas. Es trasmitida por el mosquito Aedes aegypti y afecta a la población pediátrica. Su espectro clínico incluye alteraciones de la conducción cardíaca y de bradicardia. Objetivo: Caracterizar el dengue con bradicardia en adolescente. Métodos: Se realizó un estudio observacional descriptivo, longitudinal y retrospectivo en el Hospital Pediátrico Provincial Universitario Dr. Eduardo Agramonte Piña de la provincia Camagüey en el periodo comprendido desde enero a diciembre de 2021. El universo quedó conformado por 28 pacientes con diagnóstico de dengue que presentaron bradicardia. Los datos se recogieron en un formulario y se procesaron en una base de datos creada con SPSS versión 22. Resultados: Los resultados mostraron predominio de los pacientes del sexo masculino, del municipio Camagüey, entre los síntomas iniciales más frecuentes fue el dengue sin signos de alarma, el inicio de la bradicardia es durante la hospitalización, la bradicardia sinusal se presenta en todos los pacientes, en la mayoría de los casos la duración es en la etapa de recuperación. Conclusiones: Entre los síntomas encontrados predominaron los pacientes que no presentaron signos de alarma de dengue, la aparición de estos signos se asoció con bradicardia sinusal en la etapa de recuperación.

Introduction: Dengue is a contagious infectious disease of varying intensity that originates from tropical climates such as those that predominate in the region of the Americas. It is transmitted by the Aedes aegypti mosquito and affect the pediatric population. Its clinical spectrum includes alterations in cardiac conduction and bradycardia. Objective: To characterize dengue with bradycardia in adolescents. Methods: A descriptive, longitudinal and retrospective observational study was carried out at the Dr. Eduardo Agramonte Piña University Provincial Pediatric Hospital in Camagüey province in the period from January to December 2021.The universe was made up of 28 patients diagnosed with dengue who presented bradycardia. The data was collected in a from and processed in a database created with SPSS version 22. Results: The results grouped in the form of tables, showed a predominance of male patients, from the municipality of Camagüey, among the most frequent initial symptoms is dengue without warning signs, the onset of bradycardia is during hospitalization, it occurs in all patients, in most cases the duration is in the recovery stage. Conclusions: Among the symptoms found, patients who did not present dengue alarm signs was associated with sinus bradycardia during recovery.

Development of educational technology for transcutaneous pacemaker management in older adults undergoing mobile pre-hospital assistance / Desarrollo de una tecnología educativa para el manejo de marcapasos transcutáneos en ancianos en el servicio de móvil de atención prehospitalaria / Desenvolvimento de tecnologia educacional para manejo do marca-passo transcutâneo em idosos no atendimento pré-hospitalar móvel

ABSTRACT Objective: to develop educational technology for nurses on transcutaneous pacemaker management in older adults undergoing mobile pre-hospital assistance. Method: a methodological study developed with the Advanced Support Units of the Mobile Urgency Care Service of the 2nd Metropolitan Health Region of Paraná, Brazil, in three phases: 1) Pre-production - preparation of the video script; 2) Production - script validation by expert judges, storyboard development, voiceover recording and selection of images; and 3) Post-production - evaluation of the video by expert judges and diffusion. 51 specialist judge nurses took part in validation of the script; and 47 of them assessed the video. The data were collected between April and May 2022 using instruments with a Likert scale, via Google Forms. Descriptive statistics was applied for data analysis and a Content Validity Index of at least 0.78 was considered. Results: the judges suggested less technical language, inclusion of a scene and a correction referring to the positioning of the transcutaneous pacemaker adhesive pads. A 2D video lasting 8 minutes and 30 seconds was produced, which addressed actions and care measures in managing pacemakers in older adults. The following items were considered adequate: language, images, voiceover, duration, guidelines proposed and memorization of the messages (CVI=1.0). Conclusion: the educational technology developed was considered validated for nurses regarding the transcutaneous pacemaker management in older adults. The educational video can support decision-making in favor of patient and team safety and treatment efficacy, in order to qualify the assistance provided.

RESUMEN Objetivo: desarrollar una tecnología educativa para enfermeros sobre el manejo de marcapasos transcutáneos en ancianos, en el Servicio Móvil de Atención Prehospitalaria. Método: estudio metodológico desarrollado con las Unidades de Soporte Avanzado pertenecientes al Servicio Móvil de Atención de Urgencias de la 2º Región de Salud Metropolitana de Paraná, Brasil, en tres fases: 1) Pre-producción - elaboración del guión del video; 2) Producción - validación del guión a cargo jueces especialistas, elaboración del storyboard, grabación de las narraciones y selección de las imágenes; y 3) Post-producción - evaluación del video a cargo de jueces especialistas y divulgación del video. Los participantes del proceso de validación del guión fueron 51 jueces especialistas y enfermeros de profesión; y 47 de ellos evaluaron el video. Los datos se recolectaron entre abril y mayo de 2022 por medio de instrumentos con una escala de Likert, a través de Formularios Google. Se aplicó estadística descriptiva para el análisis de los datos y se consideró un Índice de Validez de Contenido de al menos 0,78. Resultados: los jueces sugirieron lenguaje menos técnico, incluir una escena y correcciones referentes a la ubicación de los parches adhesivos del marcapasos transcutáneo. El video se produjo en 2D y duró 8 minutos con 30 segundos, analizando acciones y precauciones en el manejo de marcapasos en ancianos. Los siguientes elementos se consideraron adecuados: lenguaje, imágenes, narración, duración, pautas de orientación propuestas y memorización de los mensajes (IVC=1,0). Conclusión: la tecnología educativa que se desarrolló fue considerada validada para enfermeros en relación con el manejo de marcapasos transcutáneos en ancianos. El video educativo puede asistir en el proceso de toma de decisiones en pos de la seguridad del paciente y del equipo de atención, al igual que para la eficacia del tratamiento, a fin de calificar la asistencia provista.

RESUMO Objetivo: desenvolver tecnologia educacional para enfermeiros sobre manejo do marca-passo transcutâneo em idosos, em atendimento pré-hospitalar móvel. Método: estudo metodológico, desenvolvido junto às Unidades de Suporte Avançado do Serviço de Atendimento Móvel de Urgência da 2º Regional de Saúde Metropolitana do Paraná, Brasil, em três fases: 1) pré-produção - elaboração do roteiro do vídeo; 2) produção - validação do roteiro por juízes especialistas, elaboração do storyboard, gravação das narrações e seleção de imagens; 3) pós-produção - avaliação do vídeo por juízes especialistas e divulgação do vídeo. Participaram da validação do roteiro 51 enfermeiros juízes especialistas; e 47 deles avaliaram o vídeo. Coletaram-se os dados entre abril e maio de 2022, por meio de instrumentos, com escala de Likert, via Google Formulários. Aplicou-se estatística descritiva para análise dos dados e considerou-se Índice de Validade de Conteúdo de pelo menos 0,78. Resultados: os juízes sugeriram linguagem menos técnica, inclusão de cena e correção referente ao posicionamento das pás adesivas do marca-passo transcutâneo. Produziu-se vídeo em 2D de 8 minutos e 30 segundos, que abordou ações e cuidados no manejo do marca-passo em idosos. Consideraram-se adequados os quesitos: linguagem, imagens, narração, tempo de duração, orientações propostas e memorizações das mensagens (IVC =1,0). Conclusão: a tecnologia educacional desenvolvida foi considerada validada para enfermeiros quanto ao manejo do marca-passo transcutâneo em idosos. O vídeo educacional pode subsidiar a tomada de decisões em prol da segurança do paciente, da equipe e da eficácia no tratamento, de modo a qualificar a assistência.

Alteraciones electrocardiográficas en pacientes hospitalizados con COVID-19 / Electrocardiographic alterations in hospitalized patients with COVID-19

Resumen: Introducción: Como consecuencia del daño directo provocado por el virus SARS-CoV-2 sobre el corazón se producen alteraciones electrocardiográficas. Objetivo: Determinar si existe relación entre las alteraciones electrocardiográficas intrahospitalarias, con los antecedentes cardiovasculares y su evolución hospitalaria. Materiales y método: Estudio de cohortes, prospectivo, analítico, en 373 pacientes con el diagnóstico positivo de enfermedad por el nuevo coronavirus 2019 que ingresaron en la Unidad de Cuidados Intensivos del Hospital Docente "Comandante Manuel Fajardo" (La Habana, Cuba) entre marzo del 2020 y octubre del mismo año. Resultados: La mediana de edad fue de 69 (RIC 57-77); el 14.2% de los pacientes presentó fibrilación auricular, el 8,3% bloqueo de rama derecha y el 4.8% alteraciones del segmento ST. La edad, los antecedentes de cardiopatía isquémica y la diabetes mellitus se identificaron como variables predictoras independientes de alteraciones electrocardiográficas (RR 1.02; IC 95%: 1.01-1.04; p = 0.007; 2.21; IC 95%: 1.19-4.10, p = 0.012 y RR 1.71; IC 95%: 1.04-2.85, p = 0.036, respectivamente). Conclusiones: La prevalencia de alteraciones electrocardiográficas en pacientes hospitalizados con el nuevo coronavirus fue mayor comparada con otras series. Los antecedentes de cardiopatía isquémica y diabetes mellitus, además de la edad, se identificaron como variables predictoras independientes de alteraciones electrocardiográficas en pacientes con afección grave por la enfermedad del nuevo coronavirus 2019.

Abstract: Introduction: As a consequence of the direct damage caused by the virus on the heart, electrocardiographic alterations occur. Objective: To determine if there is a relationship between in-hospital electrocardiographic alterations with cardiovascular history and hospital evolution. Materials and method: Analytical prospective cohort study in 373 patients with a positive diagnosis of disease due to the new coronavirus 2019 who were admitted to the Intensive Care Unit of the "Comandante Manuel Fajardo" Universitary Hospital (Havana, Cuba) between March 2020 and October of the same year. Results: The median age was 69 (IQR; 57-77), 14.2% of patients had atrial fibrillation, 8.3% right bundle branch block, and 4.8% ST-segment abnormalities. Age, history of ischemic heart disease, and diabetes mellitus were identified as independent predictor variables of electrocardiographic abnormalities (RR 1.02; 95% CI: 1.01-1.04, p = 0.007; RR 2.21; 95% CI: 1.19-4.10, p = 0.012 and RR 1.71 95% CI: 1.04-2.85, p = 0.036, respectively). Conclusions: The prevalence of electrocardiographic abnormalities in hospitalized patients with the new coronavirus was higher compared to other series. History of ischemic heart disease and diabetes mellitus, in addition to age, were identified as independent predictors of electrocardiographic abnormalities in patients severely affected by the new coronavirus disease 2019.

Changes in gap junction proteins Connexin30. 2 and Connexin40 expression in the sinoatrial node of rats with dexmedetomidine-induced sinus bradycardia

Abstract Background Dexmedetomidine (Dex) is widely used, and its most common side effect is bradycardia. The complete mechanism through which Dex induces bradycardia has not been elucidated. This research investigates the expression of gap junction proteins Connexin30.2 (Cx30.2) and Connexin40 (Cx40) within the sinoatrial node of rats with Dex-induced sinus bradycardia. Methods Eighty rats were randomly assigned to five groups. Saline was administered to rats in Group C. In the other four groups, the rats were administered Dex to induce bradycardia. In groups D1and D2, the rats were administered Dex at a loading dose of 30 μg.kg−1 and 100 μg.kg−1 for 10 min, then at 15 μg.kg−1.h−1 and 50 μg.kg−1.h−1 for 120 min separately. The rats in group D1A and D2A were administered Dex in the same way as in group D1and D2; however, immediately after the administration of the loading dose, 0.5 mg atropine was administered intravenously, and then at 0.5 mg.kg−1.h−1 for 120 min. The sinoatrial node was acquired after intravenous infusion was completed. Quantitative real-time polymerase chain reaction and western blot analyses were performed to measure mRNA and protein expression of Cx30.2 and Cx40, respectively. Results The expression of Cx30.2 increased, whereas the expression of Cx40 decreased within the sinoatrial node of rats with Dex-induced sinus bradycardia. Atropine reversed the effects of Dex on the expression of gap junction proteins. Conclusion Dex possibly altered the expression of gap junction proteins to slow down cardiac conduction velocity in the sinoatrial node.

Heart rate assessment after the first dose of Fingolimod / Avaliação da frequência cardíaca após a primeira dose de Fingolimode

To evaluate the cardiovascular function of patients who received the first dose of Fingolimod in a health center in the state of Rio Grande do Sul ­ Brazil. Methods: A retrospective database study, gathering clinical data and patients' electrocardiograms who received the first dose of Fingolimod 0.5mg at Centro de Diagnóstico Cardiológico from May 2013 to October 2020. Results: From 83 patients evaluated 64 (77.1%) were women. The average age of participants was 36.97 (±11.21) years old. Out of the 22 (26.5%) symptomatic patients, drowsiness was the most common symptom. There was a statistically significant difference (p<0.0001) in the heart rate that occurred early from the first hour after taking the medicine and went on to the fifth hour. Regarding systolic blood pressure, there was a difference (p <0.0001) between the measurement before taking the drug and the measurement six hours later. However, there was no difference in systolic pressure every hour between the second hour after drug administration. The same that happened to systolic blood pressure occurred to diastolic blood pressure. There was no statistical correlation between the age group and the analyzed variables. Conclusions: The clinical, hemodynamic, and electrocardiographic changes verified in the study sample were mild and resolved within 6 hours after the dose, which allows the use of this drug to treat MS safely in the analyzed group.

Objetivo: Avaliar a função cardiovascular de pacientes que receberam a primeira dose de Fingolimode em um centro de saúde do estado do Rio Grande do Sul ­ Brasil. Métodos: Estudo retrospectivo de banco de dados, reunindo dados clínicos e eletrocardiogramas de pacientes que receberam a primeira dose de Fingolimode 0,5mg no Centro de Diagnóstico Cardiológico de maio de 2013 a outubro de 2020. Resultados: Dos 83 pacientes avaliados, 64 (77,1%) eram mulheres. A média de idade dos participantes foi de 36,97 (±11,21) anos. Dos 22 (26,5%) pacientes sintomáticos, a sonolência foi o sintoma mais comum. Houve diferença estatisticamente significativa (p<0,0001) na frequência cardíaca que ocorreu desde a primeira hora após a administração do medicamento até a quinta hora. Em relação à pressão arterial sistólica, houve diferença (p<0,0001) entre a medida antes de tomar o medicamento e a medida seis horas depois. No entanto, não houve diferença na pressão sistólica a cada hora entre a segunda hora após a administração do medicamento. O mesmo que aconteceu com a pressão arterial sistólica ocorreu com a pressão arterial diastólica. Não houve correlação estatística entre a faixa etária e as variáveis Analisadas. Conclusões: As alterações clínicas, hemodinâmicas e eletrocardiográficas verificadas na amostra estudada foram leves e se resolveram em até 6 horas após a dose, o que permite o uso desse medicamento para o tratamento da SM com segurança no grupo analisado.