Diagnostic accuracy of R-wave detection by insertable cardiac monitors.

Background: Insertable cardiac monitors (ICM) allow prolonged rhythm monitoring, but the diagnostic performance can be hampered by false positive arrhythmia alerts related to inadequate R-wave sensing. This study assesses the prevalence and predictors of inadequate R-wave sensing (both over- and undersensing) among different ICM types.

Methods: Patients implanted with an ICM at Ghent University Hospital between January 2017 and August 2018 were included.