[Cardiac manifestations in the acute phase of Kawasaki disease in a third level children's hospital in Mexico City]. / Manifestaciones cardiacas en la etapa aguda de la enfermedad de Kawasaki en un hospital pediátrico de tercer nivel en la Ciudad de México.

OBJECTIVES: To describe the cardiac manifestations in the acute phase of patients with Kawasaki disease treated in a third level Children's hospital in Mexico City, Mexico. METHODS: A cross-sectional study was conducted in patients with a diagnosis of Kawasaki disease treated in this hospital from August 1995 to December 2016. Information included patient demographics, clinical features, treatment used, electrocardiographic findings, extra-coronary echocardiographic findings, and the development of coronary artery aneurysms in the acute phase of the disease. RESULTS: The study included 508 cases of Kawasaki disease, with a mean age at diagnosis of 37.64±35.56 months (range from 2 to 200 months). Almost two-thirds (65.4%) of the patients were male, with a male/female ratio of 1.88:1. Complete Kawasaki disease was diagnosed in 79.2% of cases. Almost all cases (92.4%) received intravenous immunoglobulin. Twenty-eight patients (5.5%) developed arrhythmias, ST changes developed in 29 patients (5.6%), and 5 patients presented with ischaemic changes. In the initial echocardiographic evaluation, 51 patients (9.9%) were diagnosed with myocarditis, 72 patients (14.0%) with pericarditis and 77 cases (15.0%) developed pericardial effusion. Coronary artery anomalies were detected in 169 cases (32.9%). 32 cases were diagnosed as giant coronary aneurysms. Four patients died from cardiac complications in the acute phase of the disease. CONCLUSIONS: There has been an increase in the diagnosis of Kawasaki disease in Mexico. They presented with more cardiac complications than reported in literature. An increased knowledge of Kawasaki disease is required in Mexico in order to establish the cardiac outcomes of this group of patients.

Vasopresores e inotrópicos: uso en pediatría / Vasopressors and inotropes: use in paediatrics

Resumen: El sistema cardiovascular es un sistema dinámico cuya función es asegurar un adecuado suministro de oxígeno, nutrientes y hormonas a los tejidos, necesarios para el metabolismo celular, además sintetiza y modifican los componentes vasoactivos los cuales regulan el tono vascular y la función miocárdica. Estos componentes vasoactivos son fundamentales en el manejo del paciente pediátrico en estado crítico con falla cardiaca y choque en los cuales se ha comprobado sus efectos benéficos, sin embargo, su uso y abuso trae consigo efectos nocivos, tales como mayor riesgo de arritmias, aumento el consumo miocárdico de oxígeno lo cual podría favorecer la presencia de isquemia. Por lo tanto, es preciso conocer el mecanismo de acción de los distintos tipos de agentes vasoactivos, así como las indicaciones de dichos fármacos para minimizar dichos efectos. El propósito de esta revisión es describir la farmacología y las aplicaciones clínicas de los agentes inotrópicos y Vasopresores en el paciente pediátrico en estado crítico. © 2017 Instituto Nacional de Cardiolog´ıa Ignacio Cha´vez. Publicado por Masson Doyma Me´xico S.A. Este es un art´ıculo Open Access bajo la licencia CC BY-NC-ND (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Abstract: The cardiovascular system is a dynamic system, which is required to ensure adequate delivery of oxygen, nutrients, and hormones to the tissues that are necessary for cell metabolism. It also synthesises and modifies the vasoactive components that regulate vascular tone and myocardial function. These vasoactive components have demonstrated their beneficial effects in the management of paediatric patients in a critical condition with heart failure and shock. However, their use and abuse brings harmful effects, increases mortality, and is associated with arrhythmias. An increase in myocardial oxygen consumption favours the presence of ischaemia, therefore it is necessary to know the mechanism of action and indications of these drugs to minimise their harmful effects. The purpose of this review is to describe the pharmacology and clinical applications of inotropic and vasopressor agents in the paediatric patient in acritical condition. © 2017 Instituto Nacional de Cardiologìa Ignacio Chàvez. Published by Masson Doyma Mèxico S.A. This is an open access article under the CC BY-NC-ND license (http://creativecommons. org/licenses/by-nc-nd/4.0/).

[Vasopressors and inotropes: use in paediatrics]. / Vasopresores e inotrópicos: uso en pediatría.

The cardiovascular system is a dynamic system, which is required to ensure adequate delivery of oxygen, nutrients, and hormones to the tissues that are necessary for cell metabolism. It also synthesises and modifies the vasoactive components that regulate vascular tone and myocardial function. These vasoactive components have demonstrated their beneficial effects in the management of paediatric patients in a critical condition with heart failure and shock. However, their use and abuse brings harmful effects, increases mortality, and is associated with arrhythmias. An increase in myocardial oxygen consumption favours the presence of ischaemia, therefore it is necessary to know the mechanism of action and indications of these drugs to minimise their harmful effects. The purpose of this review is to describe the pharmacology and clinical applications of inotropic and vasopressor agents in the paediatric patient in acritical condition.

[QTc interval in the neonatal period in a Mexican population. A pilot study]. / Situación del intervalo QTc en el período neonatal en un hospital del occidente de México, estudio piloto.

INTRODUCTION: QT interval prolongation is associated with ventricular arrhythmias and sudden death syndrome. OBJECTIVE: To determine the value of QTc interval in healthy newborns in a general hospital in Jalisco, Mexico, and their outcome during their first months of life. METHODS: The study included healthy newborns from March to November 2016, in the Hospital General of Occidente in Jalisco, Mexico. A 12-lead electrocardiogram was performed at a speed of 25mm/s during the first 48h of life. The QT interval was measured in lead DII, and the QTc interval was calculated using the Bazett formula. Patients detected with QTc prolongation were assessed monthly with an ECG and echocardiogram. If they persisted with prolonged QTc interval, they were re-evaluated at 6 months with an ECG, 24h Holter, and electrocardiography study on parents and siblings. Those who persisted with prolonged QTc interval were evaluated with an ECG at 9 months. RESULTS: The study included 548 patients. The mean QTc interval at birth was 459 ms; during this period 33 patients has a QTc greated that 470 ms; which were evaluated monthly with a new electrocardiographic study, obtaining a mean QTc interal of 446 ms. At 6 months 16 patients were evaluated, with a mean QTc interval of 434ms. At 9 months, 6 patients were found to have a mean QTc interval of 438ms, and only 4 patients persisted with a prolonged QTc interval. CONCLUSIONS: The QTc interval in our population is prolonged compared to other populations and with a gradual return to normal.

Situación del intervalo QTc en el período neonatal en un hospital del occidente de México, estudio piloto / QTc interval in the neonatal period in a Mexican population. A pilot study

Resumen Introducción: La prolongación del intervalo QT se asocia con arritmias ventriculares y muerte súbita. Objetivo: Determinar el valor del intervalo QTc en recién nacidos sanos y evaluar su comportamiento durante los primeros meses de vida. Métodos: Recién nacidos sanos a término de marzo-noviembre 2016 en el Hospital General de Occidente del Estado de Jalisco, México. Se les practicó un electrocardiograma de 12 derivaciones a una velocidad de 25 mm/s durante las primeras 48 h. Se midió el intervalo QT en DII y se calculó el QTc mediante la fórmula de Bazett. Los pacientes a los que se detectó prolongación del QTc en sus primeras 48 h se valoraron al mes con ECG y ecocardiograma. Si persistieron con QTc alargado se revaloraron a los 6 meses con ECG, Holter de 24 h y estudio electrocardiográfico a padres y hermanos. Los que persistieron con QTc alargado se revaloraron a los 9 meses con ECG. Resultados: Se incluyeron 548 pacientes. La media del intervalo QTc al nacimiento fue de 459 ms; durante este período 33 pacientes presentaron un QTc mayor de 470 ms, los cuales fueron evaluados al mes mediante un nuevo estudio electrocardiográfico, obteniendo una media del intervalo QTc de 446 ms. A los 6 meses se evaluaron 16 pacientes, con una media del intervalo QTc de 434 ms. A los 9 meses se evaluaron 6 pacientes, con una media del intervalo QTc de 438 ms, y solo 4 pacientes persistieron con QTc prolongado. Conclusiones: El intervalo QTc en nuestros pacientes es más prolongado en comparación con otras poblaciones y muestra una normalización paulatina.

Abstract Introduction: QT interval prolongation is associated with ventricular arrhythmias and sudden death syndrome. Objective: To determine the value of QTc interval in healthy newborns in a general hospital in Jalisco, Mexico, and their outcome during their first months of life. Methods: The study included healthy newborns from March to November 2016, in the Hospital General of Occidente in Jalisco, Mexico. A 12-lead electrocardiogram was performed at a speed of 25 mm/s during the first 48 h of life. The QT interval was measured in lead DII, and the QTc interval was calculated using the Bazett formula. Patients detected with QTc prolongation were assessed monthly with an ECG and echocardiogram. If they persisted with prolonged QTc interval, they were re-evaluated at 6 months with an ECG, 24 h Holter, and electrocardiography study on parents and siblings. Those who persisted with prolonged QTc interval were evaluated with an ECG at 9 months. Results: The study included 548 patients. The mean QTc interval at birth was 459 ms; during this period 33 patients has a QTc greated that 470 ms; which were evaluated monthly with a new electrocardiographic study, obtaining a mean QTc interal of 446 ms. At 6 months 16 patients were evaluated, with a mean QTc interval of 434 ms. At 9 months, 6 patients were found to have a mean QTc interval of 438 ms, and only 4 patients persisted with a prolonged QTc interval. Conclusions: The QTc interval in our population is prolonged compared to other populations and with a gradual return to normal.