Study period
We focused on the Campania region in order to examine the influence of lockdown in terms of new-onset of cardiac arrhythmias among patients with ICD/CRT-D from on March 9 to on May 4, 2020. We compared these data with data from the same period in 2019. The observation window was set from January 1 2019 to May 4 2020 and 3 evaluation periods were defined during the 16 months of observation: a global period (from January 1st 2019 to May 4th 2020), a reference period (from March 9th to May 4th 2019) and lockdown period (March 9th to May 4th, 2020).