Reassessing Risk Factors in Pediatric Patients With Pacemakers Implanted for Atrioventricular Block: The Impact of Nonsustained Ventricular Tachycardia

Abstract

In children with pacemakers implanted for AVB, NSVT is not uncommon and may be associated with increased mortality. Persistent LV dysfunction may also be a potential factor associated with death. Closer follow-up should be considered in patients with these findings. Large, multicenter studies should be considered to confirm these findings and identify risk stratification methods for this unique patient population.

Bloqueio atrioventricular total em paciente jovem sem antecedentes cardiovasculares / Total atrioventricular block in a young patient without cardiovascular history

“…O bloqueio atrioventricular total (BAVT) é definido como a inabilidade de um impulso atrial propagar-se aos ventrículos utilizando o sistema de condução normal (LIMA,1993). As etiologias podem ser de três tipos: (1) idiopática, (2) adquirida e (3) imunomediada (NIU, 2016). As causas são reflexo vagotônico excessivo (BAVT nodal), cirurgia, distúrbios eletrolíticos, miocardites, doença de Chagas, doenças autoimune, processos infiltrativos, estenose aórtica calcificada (BODANESE, 2015), mas pode ser congênito.…”

Rounding Up the Usual Suspects: Nonsustained Ventricular Tachycardia and Sustained Left Ventricular Dysfunction as Risk Factors for Sudden Death in Isolated AV Block

“…The prognostic significance of this arrhythmia in those with isolated AV block is unknown. In this issue of the Journal , Niu et al . present the experience of a single large center retrospectively analyzing predictors of mortality in this population.…”

“…11 The prognostic significance of this arrhythmia in those with isolated AV block is unknown. In this issue of the Journal, Niu et al 12 device memory, ambulatory electrocardiograms, and exercise stress tests. Fourteen patients (10%) had identified nonsustained ventricular tachycardia; 11 were identified by Holter, 8 from pacemaker memory, and only one from exercise stress testing.…”

“…11 The prognostic significance of this arrhythmia in those with isolated AV block is unknown. In this issue of the Journal, Niu et al 12 present the experience of a single large center retrospectively analyzing predictors of mortality in this population. Identification of nonsustained ventricular tachycardia was from pacemaker device memory, ambulatory electrocardiograms, and exercise stress tests.…”