Ventricular fibrillation undersensing to calculate a safety threshold for baseline rhythm R-wave amplitudes

We have read with great interest the study of Mark L. Brown [1], on ventricular fibrillation (VF) sensing using Medtronic implantable cardioverter defibrillators (ICDs). Dr. Brown describes the ventricular sensing process performed on Medtronic ICDs, but unfortunately his report does not show further data processed with proprietary filters. Dr. Brown does criticize our recent report [2], in which we documented that baseline rhythm (BR) R-wave amplitudes ≤2.5 mV (Interquartile range: 2.3, 2.8) show potential for high undersensing rates of VF electrograms dropping below the minimum nominal sensitivity during spontaneous VF.

Source: Journal of Electrocardiology - October 8, 2018 Category: Cardiology Authors: David Filgueiras-Rama, Jos é María Lillo-Castellano, Jorge G. Quintanilla Source Type: research