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1.
Arch Med Res ; 52(2): 233-239, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33160753

RESUMO

BACKGROUND AND AIM: Obesity increases the risk of atrial fibrillation (AF) while it may impact the outcome of patients with AF. The clinical implications of this relationship are not completely clear. We aimed to analyze the association of traditional anthropometric measures of excessive adiposity with 12 month case fatality rate (CFR) in patients with AF. METHODS: This was a multicenter, longitudinal, observational study on adults with documented AF, excluding records of AF secondary to reversible causes. Anthropometric variables were registered at baseline, and a central committee validated the 12 month outcomes. RESULTS: We studied 1193 patients (median age: 69.14 years, 55.2% women). At baseline, rhythm control was established for 476 (39.9%) subjects, while frequency control was offered to 717 (60.1%) participants. The 12 month all-cause CFR was 8.9%. A high basal body mass index (BMI), waist-to-height ratio (WHtR) and waist circumference (WC) were associated with lower CFR in bivariate analyses. In a Cox-proportional hazards model, variables associated with 12 month all-cause CFR were BMI categories (HR: 0.736, 95% CI: 0.584-0.928), chronic heart failure (HR: 1.738, 95% CI: 1.127-2.680), chronic kidney disease (HR: 2.269, 95% CI: 1.162-4.429) and carotid stenosis >50% (HR: 5.342, 95% CI: 1.661-17.181). CONCLUSION: The risk of death at one year in patients with AF is inversely associated with a high BMI and directly associated with the presence of chronic kidney disease, carotid stenosis, and chronic heart failure in this cohort of patients with AF. The causes and implications of this apparent obesity paradox should be addressed in the future.


Assuntos
Fibrilação Atrial/etiologia , Obesidade/complicações , Idoso , Fibrilação Atrial/complicações , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Obesidade/fisiopatologia , Fatores de Risco , Fatores de Tempo
2.
Glob Heart ; 15(1): 32, 2020 04 10.
Artigo em Inglês | MEDLINE | ID: mdl-32489805

RESUMO

Background: Documenting the patterns of oral anticoagulation therapy (OAT) is essential to prevent thromboembolic complications of nonvalvular atrial fibrillation (NVAF). Objective: To report the patterns of OAT according to age and thromboembolic risk in patients included in CARMEN-AF, a nationwide registry of NVAF in Mexico, an upper middle-income country. Material and methods: There were 1,423 consecutive patients ≥18 years old and with at least one thromboembolic risk factor enrolled in the CARMEN-AF Registry at their regular clinical visit during a three-year period. They were analyzed according to 1) age, 2) AF type, and 3) CHA2DS2-VASc score. Results: Overall, 16.4% of patients did not receive antithrombotic treatment, 19.4% received antiplatelet drugs (APD), 29.2% vitamin K antagonists (VKA), and 34.6% direct oral anticoagulants (DOAC). With increasing age, the proportion of subjects treated with VKA decreased significantly from 36.2% in subjects <65 years to 22.5% in those ≥75 years old (P <0.0001). Concomitantly, an increase in both APD and no antithrombotic treatment was observed with increasing age. DOAC were prescribed equally among all age groups (34.2% in <65, 36.0% in 65-74, and 33.9% in ≥75). According to the type of AF, VKA use was more common in patients with permanent AF (32.7%). A lower use of DOAC was observed in high thromboembolic risk subjects (33.6% in CHA2DS2-VASc ≥2) compared with the moderate risk group (41% in CHA2DS2-VASc = 1). Conclusions: VKA use for NVAF in Mexico decreased in relation to increasing age. The proportion of DOAC therapy was the same in all age groups. Nevertheless, elderly patients with high thromboembolic risk received a suboptimal thromboprophylaxis. These data could help to improve gaps in the implementation of global guidelines. Clinical trial registration: http://www.clinicaltrials.gov. Unique identifier: NCT02334852. Highlights: CARMEN-AF is a nationwide multi-centric registry seeking to bridge the data gap on anticoagulation therapy for NVAF in Mexico.Elderly patients are more prone to receive suboptimal OAT for NVAF.DOAC were less frequently used in high thromboembolic risk patients (CHA2DS2-VASc ≥2).


Assuntos
Fibrilação Atrial/tratamento farmacológico , Fibrinolíticos/uso terapêutico , Sistema de Registros , Acidente Vascular Cerebral/prevenção & controle , Tromboembolia/prevenção & controle , Fatores Etários , Idoso , Fibrilação Atrial/complicações , Feminino , Humanos , Incidência , Masculino , México/epidemiologia , Fatores de Risco , Acidente Vascular Cerebral/epidemiologia , Acidente Vascular Cerebral/etiologia , Taxa de Sobrevida/tendências , Tromboembolia/complicações
3.
Arch. cardiol. Méx ; 87(2): 124-143, Apr.-Jun. 2017. tab, graf
Artigo em Espanhol | LILACS | ID: biblio-887506

RESUMO

Resumen: Conociendo el impacto real de la fibrilación auricular en el evento vascular cerebral, la Sociedad Mexicana de Electrofisiología y Estimulación Cardiaca (SOMEEC) contempló la iniciativa de desarrollar una reunión multidisciplinaria de expertos con la finalidad de actualizar la evidencia científica disponible a partir de guías de práctica clínica, metaanálisis y ensayos clínicos controlados, y complementarla con la experiencia y los puntos de vista de un grupo de expertos. Para cumplir con este objetivo, se reunió a un grupo de especialistas en el área de cardiología, electrofisiología, neurología y hematología que, dada su experiencia en ciertas áreas, compartieron la evidencia científica disponible ante el panel de expertos para dejar abierta una discusión sobre la información que se presentaría en el presente artículo. Este documento reúne la mejor evidencia científica disponible y pretende ser una herramienta útil que agilice la toma de decisiones para uso de los nuevos anticoagulantes orales en fibrilación auricular no valvular y cardiopatía isquémica, o referente al manejo de pacientes que presentan evento vascular cerebral, o insuficiencia renal, e incluso en aquellos que serán sometidos a procedimientos invasivos y cirugía electiva. En la misma se manejan esquemas comparativos de seguimiento y tratamiento que simplifica la toma de decisión por los especialistas participantes.


Abstract: Knowing the real impact of atrial fibrillation in the stroke, the Sociedad Mexicana of Electrofisiología y Estimulación Cardiaca (SOMEEC) had the initiative to develop a multidisciplinary meeting of experts the with the purpose to update the available scientific evidence from clinical practice guidelines, meta-analyses, controlled clinical trials, and complementing with the experience and views of a group of experts. To meet this goal, SOMEEC gathered a group of specialists in the area of cardiology, electrophysiology, neurology and hematology that given their experience in certain areas, they share the scientific evidence with the panel of experts to leave open a discussion about the information presented in this article. This document brings together the best scientific evidence available and aims to be a useful tool in the decision to use of new oral anticoagulants in nonvalvular atrial fibrillation and ischemic heart disease, or relating to the management of patients with stroke or renal failure, and even those that will be submitted to elective surgery and invasive procedures. In the same, they handled comparative schemes of follow-up and treatment which simplifies the decision making by the specialists participants.


Assuntos
Humanos , Fibrilação Atrial/complicações , Acidente Vascular Cerebral/etiologia , Acidente Vascular Cerebral/prevenção & controle , Anticoagulantes/administração & dosagem , Administração Oral , Anticoagulantes/farmacologia
4.
Rev. mex. cardiol ; 28(1): 29-34, Jan.-Mar. 2017. tab, graf
Artigo em Inglês | LILACS | ID: biblio-902318

RESUMO

Abstract: Carotid sinus syndrome is a cause of syncope and falls in the elderly that is frequently overlooked because of different reasons, nevertheless it might be present in up to 40% of subjects older than 80 years. Its physiopathology is not clear even if it has many common points with neutrally mediated syncope. Its main feature is that the trigger for the symptoms is the stimulation of the neck's baro-receptors. The diagnosis is usually clinical and the carotid sinus massage confirms it by reproducing the symptoms when it induces longer than three second asystole or blood pressure drops higher than 50 mmHg. Its treatment has many controversial points and the options are limited when it comes to the vasodepressor variety. In the cardio-inhibitory variety, the most accepted treatment is a pacemaker implant, nonetheless, the recurrence rates still high.


Resumen: El síndrome del seno carotídeo es una causa de síncope y caídas en el adulto mayor que suele pasarse por alto por diferentes razones; sin embargo, está presente hasta en un 40% de los mayores de 80 años de edad. La fisiopatología no está del todo clara pero tiene muchos puntos en común con el síncope neuralmente mediado, con la peculiaridad de que el disparador depende de la estimulación de los barorreceptores del cuello. El diagnóstico es clínico y las maniobras de masaje del seno carotídeo lo confirman al reproducir los síntomas cuando se inducen asistolias superiores a tres segundos y caídas de presión arterial mayores a 50 mmHg con el masaje. El tratamiento presenta muchos puntos de controversia y hay opciones limitadas cuando se trata de la variedad vasodepresora. En el caso de la cardioinhibición, la opción más adecuada es el implante de un marcapasos, pero aún así las tasas de recurrencia siguen siendo elevadas.

5.
Arch Cardiol Mex ; 87(2): 124-143, 2017.
Artigo em Espanhol | MEDLINE | ID: mdl-27578566

RESUMO

Knowing the real impact of atrial fibrillation in the stroke, the Sociedad Mexicana of Electrofisiología y Estimulación Cardiaca (SOMEEC) had the initiative to develop a multidisciplinary meeting of experts the with the purpose to update the available scientific evidence from clinical practice guidelines, meta-analyses, controlled clinical trials, and complementing with the experience and views of a group of experts. To meet this goal, SOMEEC gathered a group of specialists in the area of cardiology, electrophysiology, neurology and hematology that given their experience in certain areas, they share the scientific evidence with the panel of experts to leave open a discussion about the information presented in this article. This document brings together the best scientific evidence available and aims to be a useful tool in the decision to use of new oral anticoagulants in nonvalvular atrial fibrillation and ischemic heart disease, or relating to the management of patients with stroke or renal failure, and even those that will be submitted to elective surgery and invasive procedures. In the same, they handled comparative schemes of follow-up and treatment which simplifies the decision making by the specialists participants.


Assuntos
Anticoagulantes/administração & dosagem , Fibrilação Atrial/complicações , Acidente Vascular Cerebral/etiologia , Acidente Vascular Cerebral/prevenção & controle , Administração Oral , Anticoagulantes/farmacologia , Humanos
6.
Rev Med Inst Mex Seguro Soc ; 54 Suppl 3: S309-S313, 2016.
Artigo em Espanhol | MEDLINE | ID: mdl-27855055

RESUMO

BACKGROUND: Placing the right ventricular pacing electrode in different places than the apex is less deleterious to the ejection fraction and left ventricular synchrony. Currently it is not defined which non apical site is better alternative. The aim of this paper was to determine if there is a difference in systolic function and left ventricular synchrony with stimulation of medial septum or outflow tract of the right ventricle in patients with atrioventricular block and pacemaker device. METHODS: This was an observational analytical cross study. The patients included in this study were the population over 18 years old, diagnosed with atrioventricular block and pacemaker device. Two groups were divided according to the site of electrode placement whether in medial septum region or outflow tract of the right ventricle. The ejection fraction and left ventricular synchrony was determined by echocardiogram. RESULTS: 54 patients were included in each group, with similar demographic characteristics, except for the time of placement of ventricular electrode (p = < 0.001). No significant difference in ejection fraction or left ventricular synchrony was found. CONCLUSIONS: There were no differences in ejection fraction or left ventricular synchrony regardless of the ventricular electrode placement.


Introducción: el objetivo del presente estudio fue determinar si existe diferencia en la función sistólica y la sincronía del ventrículo izquierdo con estimulación del septum medio o tracto de salida del ventrículo derecho en pacientes con bloqueo auriculoventricular portadores de marcapaso. Métodos: estudio observacional, analítico, transversal. Se seleccionaron todos los pacientes mayores de 18 años portadores de marcapaso con diagnóstico de bloqueo auriculoventricular. Se analizaron dos grupos acorde al sitio de colocación del electrodo de estimulación en región septal media o tracto de salida del ventrículo derecho. Se determinó la fracción de expulsión y sincronía del ventrículo izquierdo. Resultados: se incluyeron 54 pacientes por cada grupo, siendo las características de ambos similares, excepto el tiempo de colocación del electrodo de estimulación ventricular (p = < 0.001). No hubo diferencia significativa en la fracción de expulsión o sincronía del ventrículo izquierdo. Conclusiones: no se encontró diferencia en la fracción de expulsión o sincronía del ventrículo izquierdo independientemente del sitio de colocación del electrodo de estimulación.


Assuntos
Bloqueio Atrioventricular/terapia , Terapia por Estimulação Elétrica/métodos , Ventrículos do Coração/fisiopatologia , Marca-Passo Artificial , Função Ventricular Esquerda/fisiologia , Adulto , Idoso , Bloqueio Atrioventricular/fisiopatologia , Estudos Transversais , Terapia por Estimulação Elétrica/instrumentação , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Volume Sistólico , Resultado do Tratamento
8.
Gac Med Mex ; 150 Suppl 1: 48-59, 2014 Dec.
Artigo em Espanhol | MEDLINE | ID: mdl-25643677

RESUMO

INTRODUCTION: The Mexican Registry of Atrial Fibrillation (ReMeFa) is the first national multicenter registry with one-year clinical follow-up on the treatment of atrial fibrillation (AF) in newly diagnosed patients. OBJECTIVE: To describe the demographics and treatment modalities for rhythm control (RC) strategy or heart rate (HR) control in patients with AF treated by cardiologists. A secondary objective was to prospectively evaluate the status of AF according to the chosen strategy; sinus rhythm in RC and mean ventricular rate at rest ≤ 80 bpm in HR, as well as the incidence of clinical outcomes at 12 month follow-up. METHODS: ReMeFa was a multicenter, prospective, descriptive study. We included adults with documented AF. We excluded those with AF secondary to reversible causes, undergoing pulmonary vein ablation, pacemaker or defibrillator users, with a life expectancy of less than one year, or with physical or mental impediments to meet the protocol objectives. Data were collected at baseline and at 6 and 12 months. RESULTS: We registered 1,201 subjects and 1,193 were eligible for evaluation: 40% were on RC strategy and 60% on HR control. In the RC strategy, the drugs most commonly used were class III antiarrhythmics (64%), beta-blockers (25%), and digoxin (24%). In HR control strategy, the drugs used were digoxin (69%), class III antiarrhythmics (59%), and beta-blockers (56%). Compared with those on HR control, patients in RC strategy were younger (64 ± 14 years), in sinus rhythm (55%) and with paroxysmal AF (60%) at baseline. Patients in HR control were older (68 ± 13 years), with non-paroxysmal AF (91%), valvular disease (42%), heart failure (35%), left ventricular dysfunction (33%), and diabetes (25%). At one year follow-up, a 3% incidence of ischemic stroke was observed in the HR control group, significantly higher than the 1% observed in the RC strategy (p = 0.041). CONCLUSIONS: ReMeFa registry results offer a current and comprehensive perspective on management strategies in Mexican patients with AF. The RC strategy provided better control of the arrhythmia as compared with the HR control strategy and it was associated with a lower rate of ischemic stroke. Nonetheless, current strategies of treatment of AF are not satisfactory.

9.
Rev Med Inst Mex Seguro Soc ; 50(2): 213-31, 2012.
Artigo em Espanhol | MEDLINE | ID: mdl-22882993

RESUMO

Atrial fibrillation (AF) is associated with long-term increase in the incidence of cerebrovascular disease, heart failure and mortality. The incidence of ischemic stroke in patients with non-valvular atrial fibrillation averages 5 % per year, from two to seven more frequent than in patients without atrial fibrillation (AF). One in six ischemic stroke occurs in patients with AF. The detection and accurate diagnosis and timely therapeutic intervention have shown a decrease in morbidity and mortality associated with this arrhythmia. The above data by themselves justify the development of a management guide and care for these patients. The purpose of this guide is to provide health professionals recommendations based on the best available evidence with the intent to standardize actions: diagnosis and identification of patients with atrial fibrillation; risk stratification and treatment according to the classification of atrial fibrillation; identification of the risk of thromboembolism and its prevention; and treatment guidelines to determine which patient will require to be referred promptly.


Assuntos
Fibrilação Atrial/diagnóstico , Fibrilação Atrial/terapia , Algoritmos , Fibrilação Atrial/complicações , Fibrilação Atrial/tratamento farmacológico , Cardioversão Elétrica , Humanos , Trombose Intracraniana/etiologia , Trombose Intracraniana/prevenção & controle
10.
Arch Cardiol Mex ; 81(1): 13-7, 2011.
Artigo em Espanhol | MEDLINE | ID: mdl-21592885

RESUMO

UNLABELLED: Atrial fibrillation is the most common arrhythmia, predominantly affecting individuals older than 70 years of age. There is little information about its management in Mexico, for this purpose the Mexican Registry of Atrial Fibrillation (ReMeFa) was designed. METHODS: ReMeFA is a prospective multicentric, observational registry concerning the treatment of atrial fibrillation in Mexico. It includes patients 18 years and older, from both genders, with documented atrial fibrillation. Patients with secondary atrial fibrillation from a reversible cause, previous treatment with pulmonary vein ablation (percutaneous or surgical), pacemakers or defibrillators, and with a life expectancy of less than one year, physically or mentally impaired for completing the protocol were excluded. Clinical and demographic data were collected at enrollment and in two scheduled visits at 6 and 12 months. Information about pharmacologic treatment for rhythm or rate control was particularly obtained. PRELIMINARY RESULTS: Between December 2008 to July 2009, 1201 patients from 79 centers were enrolled. CONCLUSION: This registry will provide valuable information about the strategy chosen by physicians in Mexico for the treatment of atrial fibrillation.


Assuntos
Fibrilação Atrial/tratamento farmacológico , Fibrilação Atrial/fisiopatologia , Frequência Cardíaca , Sistema de Registros , Feminino , Humanos , Masculino , México , Estudos Prospectivos
11.
Arch. cardiol. Méx ; 81(1): 13-17, ene.-mar. 2011. tab
Artigo em Espanhol | LILACS | ID: lil-631993

RESUMO

La fibrilación auricular es una arritmia muy frecuente y afecta predominantemente a individuos mayores de 70 años. Se dispone de poca información sobre su manejo en México por lo que se diseñó el Registro Mexicano de Fibrilación Auricular (ReMeFA). Método: Se trata de un estudio multicéntrico, observacional, prospectivo sobre el tratamiento de la fibrilación auricular. Se incluyeron sujetos de ambos géneros, mayores de 18 años de edad, con fibrilación auricular documentada. Se excluyeron aquellos con fibrilación auricular secundaria a una causa reversible, sometidos a ablación de venas pulmonares (quirúrgica o por catéter), portadores de marcapasos o desfibriladores, aquellos con expectativa de vida menor a un año o incapacitados física o mentalmente para cumplir con los requisitos del protocolo. Se recolectaron datos clínicos y demográficos en forma basal y en visitas programadas a los seis y doce meses. Especialmente, se recabó información acerca del tratamiento farmacológico para control del ritmo o de la frecuencia. Resultados preliminares: Entre el ocho de diciembre y el 29 de julio de 2009 se incluyeron 1201 pacientes provenientes de 79 centros, con diagnóstico de fibrilación auricular. Conclusión: El registro proporcionará información valiosa sobre las estrategias actualmente empleadas en la República Mexicana para el tratamiento de la fibrilación auricular, sea mediante control del ritmo o control de la frecuencia.


Atrial fibrillation is the most common arrhythmia, predominantly affecting individuals older than 70 years of age. There is little information about its management in Mexico, for this purpose the Mexican Registry of Atrial Fibrillation (ReMeFa) was designed. Methods: ReMeFA is a prospective multicentric, observational registry concerning the treatment of atrial fibrillation in Mexico. It includes patients 18 years and older, from both genders, with documented atrial fibrillation. Patients with secondary atrial fibrillation from a reversible cause, previous treatment with pulmonary vein ablation (percutaneous or surgical), pacemakers or defibrillators, and with a life expectancy of less than one year, physically or mentally impaired for completing the protocol were excluded. Clinical and demographic data were collected at enrollment and in two scheduled visits at 6 and 12 months. Information about pharmacologic treatment for rhythm or rate control was particularly obtained. Preliminary results: Between December 2008 to July 2009, 1201 patients from 79 centers were enrolled. Conclusion: This registry will provide valuable information about the strategy chosen by physicians in Mexico for the treatment of atrial fibrillation.


Assuntos
Feminino , Humanos , Masculino , Fibrilação Atrial/tratamento farmacológico , Fibrilação Atrial/fisiopatologia , Frequência Cardíaca , Sistema de Registros , México , Estudos Prospectivos
12.
Arch. Inst. Cardiol. Méx ; 67(4): 290-301, jul.-ago. 1997. tab, ilus
Artigo em Espanhol | LILACS | ID: lil-217308

RESUMO

Se estudiaron en forma consecutiva 16 pacientes con anomalías de Ebstein con taquicardias supraventriculares, que involucran una vía accesoria. Encontramos una vía accesoria en 9 (56 por ciento) pacientes, y múltiples vías en 7 (44 por ciento), incluyendo 5 fibras de Mahaim atriofasciculares. Veintitrés vías fueron manifiestas y sólo dos ocultas. El 96 por ciento (24/25) se localizaron en el lado derecho: en la región lateral 36 por ciento (9/25), posterolateral 24 por ciento (6/25), poseroseptal 20 por ciento (5/25). Hubo otras localizaciones 16 por ciento (4/25) y lateral 4 por ciento (1/25). Los pacientes fueron sometidos a tres modalidades de tratamiento según la gravedad del padecimiento. Diez (62 por ciento) con 13 vías se sometieron a ablación con radiofrecuencia por vía percutánea, 3 (19 por ciento) con 7 vías a ablación transoperatoria y 3 (19 por ciento) con 5 vías a sección quirúrgica. La técnica de mapeo para la identificación y localización de la vía accesoria no fue diferente a los criterios actuales. Se obtuvo un éxito del 100 por ciento y sin recurrencia en las vías sometidas a sección quirúrgica (4/4) y ablación con radiofrecuencia (6/6) transoperatoria. El éxito primario fue de 86 por ciento (6/7) en ablación percútanea de una vía, con un fracaso y una recurrencia, y de 67 por ciento (4/6) en múltiples vías con dos fracasos y dos recurrencias. Estos pacientes no han sido sometidos a un segundo intento y se han controlado con antiarrítmicos. El éxito total con los tres procedimientos fue del 88 por ciento (22/25), 12 por ciento (3/25) fracasos, 12 por ciento (3/25) recurrencias, sin mortalidad y sin complicaciones mayores. En conclusión, en la anomalía de Ebstein, la ablación con radiofrecuencia por vía percutánea es el tratamiento de elección en pacientes sin deterioro hemodinámico que no requiere cirugía, y la ablación transoperatoria en aquellos que serán sometidos a corrección quirúrgica de su patología y defectos asociados. La sección quirúrgica de la vía debe considerarse un procedimiento histórico frente a la ablación con radiofrecuencia


Assuntos
Humanos , Masculino , Feminino , Adolescente , Adulto , Pessoa de Meia-Idade , Ablação por Cateter/métodos , Anomalia de Ebstein/terapia , Ecocardiografia , Eletrocardiografia , Eletrofisiologia , Pré-Excitação Tipo Mahaim , Taquicardia Supraventricular
13.
Arch. Inst. Cardiol. Méx ; 66(6): 489-95, nov.-dic. 1996. ilus, tab
Artigo em Espanhol | LILACS | ID: lil-187752

RESUMO

Se estudiaron en forma prospectiva 42 pacientes, en quienes se evaluó la utilidad de la prueba de esfuerzo en la programación de los marcapasos bicamerales en relación al funcionamiento con frecuencia superior, relación entre la frecuencia de bloqueo del marcapasos y el límite superior de frecuencia previamente establecida. Fueron excluidos pacientes sin prueba de esfuerzo después de la implantación del marcapasos. Durante la prueba de esfuerzo 7 (17 por ciento) pacientes presentaron conducción AV 1:1 (grupo I); 16 (38 por ciento) bloqueo AV de segundo grado con periodicidad de Wenckebach (grupo II); 14 (33 por ciento) bloqueo AV de segundo grado 2:1 (grupo III); y 5 (12 por ciento) inhibición del marcapasos por aparición de ritmo propio (grupo IV). La frecuencia de bloqueo del marcapasos en grupo I y II fue mayor al límite superior de frecuencia, 156.85 ñ 22.16 vs 141.43 ñ 20.82 y 135.25 ñ 11.54 vs 121.25 ñ 5.9, respectivamente. En el grupo III y IV fue inferior, 120.36 ñ 15.31 vs 138.57 ñ 13.29 y 121.0 ñ 7.38 vs 142.0 ñ 14.39. El análisis comparativo de la frecuencia de bloqueo del marcapasos con respecto al límite superior de frecuencia mostró diferencias estadísticamente significativas (p< 0.05) entre el grupo I y II, y entre el grupo I y III. La aparición de bloqueo AV de segundo grado 2:1 no es fisiológica, debido a una caída brusca del gasto cardiaco. Esta situación se puede predecir y corregir mediante la programación no invasiva, con el uso de telemetría de parámetros como el retraso AV, el límite superior de frecuencia y el periodo refractario atrial post-ventricular, para obtener un adecuado funcionamiento con frecuencia superior del marcapasos, basado en los resultados obtenidos durante una prueba de esfuerzo


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Estimulação Cardíaca Artificial , Teste de Esforço/estatística & dados numéricos , Marca-Passo Artificial
14.
Arch. Inst. Cardiol. Méx ; 66(3): 210-9, mayo-jun. 1996. tab, ilus
Artigo em Espanhol | LILACS | ID: lil-181577

RESUMO

Realizamos ablación con catéter de radiofrecuencia (RF) en 14 pacientes consecutivos con taquicardia ventricular (TV), de los cuales 10 tenían corazón sano, uno con cardiopatía isquémica, uno con displasia arritmogénica del ventrículo derecho, uno con miocardiopatía dilatada y uno con cardiopatía congénita compleja. El sitio de origen fue: 10 en el fascículo posterior izquierdo, 3 en el tracto de salida del ventrículo derecho (TSVD), y un paciente con cardiopatía isquémica con sustrato localizado en la punta del ventrículo izquierdo (VI). Todos ellos con TV refractaria a manejo farmacológico, usando un promedio de 2.7 drogas por paciente. Previo estudio electrofisiológico (EEF), se realizó mapeo endocavitario para la localización del sustrato arritmogénico. Posteriormente se pasó a realizar la ablación con RF: se dio un promedio de 15 pulsos, con una energía de 40 W, y el tiempo promedio por sesión fue de 25 segundos. El procedimiento fue exitoso en el 60 por ciento de la TV fasciculares, con una recurrencia del 16 por ciento; de las originadas en el TSVD se obtuvo el 100 por ciento, sin recurrencias. En el paciente isquémico se tuvo éxito primario, sin embargo presentó recurrencia, llevandolo a un segundo intento igualmente exitoso y sin recurrencia al momento. No se tuvo complicaciones mayores en este grupo. Los pacientes no exitosos requirieron nuevamente el uso antiarritmias. El éxito total de la serie es de 71.4 por ciento con 10 por ciento de recurrencias, sin mortalidad


Assuntos
Humanos , Masculino , Feminino , Adulto , Ablação por Cateter , Arritmias Cardíacas , Taquicardia Ventricular/terapia
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