Post date: 18-abr-2015 6:21:30

Title: R-wave amplitude during follow-up of implantable cardioverter defibrillators to predict under-sensing upon spontaneous ventricular fibrillation

Date: 12-May-2015

Aula

Speaker: José María Lillo (URJC)

Material:

Abstract:

Sufficient electrogram (EGM) amplitude during ventricular fibrillation (VF) is crucial to avoid under-sensing during spontaneous VF. However, the relationship between R-wave amplitude during normal ventricular rhythm (NVR) and its deviation during VF has not been elucidated. Current guidelines recommend R-wave values >7 mV during implantation, even though safe R-wave threshold values during follow-up have not been established, which may lead to unnecessary lead replacement.

Purpose: To analyze R-wave voltage in NVR and its behavior and infra-detection rate during spontaneous VF episodes, and to further define safety amplitude thresholds during follow-up. We also aimed to study clinical variables that may indicate higher under-sensing risk.