RESUMO
BACKGROUND: Electrical isolation of pulmonary veins (PV) with high-power short-duration (HPSD) radiofrequency application (RFa) may reduce the duration of atrial fibrillation (AF) ablation, without compromising the procedural efficacy and safety in comparison with the conventional approach. This hypothesis has been generated in several observational studies; the POWER FAST III will test it in a randomized multicenter clinical trial. METHODS: It is a multicenter randomized, open-label and non-inferiority clinical trial with two parallel groups. AF ablation using 70 W and 9-10 s RFa is compared with the conventional technique using 25-40 W RFa guided by numerical lesion indexes. The main efficacy objective is the incidence of atrial arrhythmia recurrences electrocardiographically documented during 1-year follow-up. The main safety objective is the incidence of endoscopically detected esophageal thermal lesions (EDEL). This trial includes a substudy of incidence of asymptomatic cerebral lesions detected by magnetic resonance imaging (MRI) after ablation. RESULTS: A randomized clinical trial compares for the first time high-power short-duration and conventional ablation in order to obtain data about the efficacy and safety of the high-power technique in an adequate methodological context. CONCLUSIONS: The results of the POWER FAST III could support the use of the high-power short-duration ablation in clinical practice. REGISTRATION: ClinicalTrials.gov: NTC04153747.
RESUMO
Abstract A case of intraoperative awareness during ablation of pulmonary veins-one of the most widely used techniques in interventional cardiology-is discussed. An infusion of isoproterenol was administered following the ablation of ectopic foci. A few seconds after the infusion the patient experienced increased heart rate and intraoperative awareness manifested as an abrupt patient movement and bispectral index elevation. This has been described in similar procedures, following the administration of isoproterenol. In our opinion, the isoproterenol infusion caused the increased heart rate and subsequent abrupt rise in cardiac output. As an inversely proportional relationship between the propofol concentrations and cardiac output has been described, we believe that this rise in cardiac output could have favored the decline in the concentrations of propofol, leading to an intraoperative awareness episode.
Resumen Presentamos un caso de despertar intraoperatorio durante la ablación de venas pulmonares, una de las técnicas más empleadas por los cardiólogos intervencionistas. Tras la ablación de focos ectópicos se procede a la infusión de isoproterenol. Segundos después de la infusión se produce un aumento de la frecuencia cardíaca seguido de un despertar intraoperatorio traducido como un movimiento brusco del paciente y un aumento en el índice bi-espectral (BIS). Esto ha sido descrito en procedimientos similares tras la administración de isoproterenol. En nuestra opinión, la infusión de isoproterenol provocó un aumento de la frecuencia cardiaca y secundariamente del gasto cardíaco de forma brusca. Dado que se ha descrito una relación inversamente propocional entre las concentraciones de propofol y el gasto cardíaco, pensamos que este aumento del gasto cardíaco pudo condicionar un descenso de las concentraciones de propofol y esto causar el episodio de despertar intraoperatorio.
Assuntos
Humanos , Pessoa de Meia-Idade , Veias Pulmonares , Débito Cardíaco , Propofol , Ablação por Cateter , Consciência no Peroperatório , Isoproterenol , Anestésicos , Cardiologia , Ruscus , Cardiologistas , Frequência CardíacaRESUMO
Presentamos el caso de una mujer de 79 años que ingresa en el servicio de Cardiología tras acudir a Urgencias con síntomas sugerentes de un síndrome coronario agudo, llegando a un diagnóstico cada vez más frecuente y quizá infradiagnosticado años atrás. El Síndrome de Takotsubo es una entidad clínica predominante en mujeres postmenopáusicas y se presenta típicamente tras un estrés físico o psíquico intenso. El cuadro clínico remeda el de un síndrome coronario agudo, sin embargo es característica la ausencia de lesiones angiográficas coronarias y un patrón ecocardiográfico de "balonización" del ventrículo izquierdo por hipercontractilidad de los segmentos basales y discinesia apical. Estas alteraciones suelen recuperarse completamente en el transcurso de unas semanas. Exponemos además una pequeña revisión sobre el estado actual del diagnóstico y tratamiento (AU)
We report a case of a 79 year old woman admitted to our Cardiology department for symptoms suggestive of acute coronary syndrome, eventually reaching an increasingly common diagnosis of a syndrome that was perhaps under-diagnosed in previous years. Takotsubo syndrome is a clinical entity predominantly occurring in postmenopausal women typically after severe physical or psychological stress. The symptoms mimic an acute coronary syndrome, however the absence of coronary angiographic lesions and an echocardiographic pattern of "apical ballooning" in the left ventricle because of hyperkinesis of the basal segments and apical dyskinesia are characteristic of this syndrome. These symptoms are usually fully resolved within a few weeks. We also present a brief review of the current state of its diagnosis and treatment (AU)
