2.) Group comparison of preoperative rhythm disorders and device
data
Comparing the underlying rhythm disorders, it could be observed that in
the EL group, there was a significantly higher proportion of
atrio-ventricular (AV) blockages (69.2%), the highest proportion of
primary prophylactic implantable cardioverter-defibrillator (ICD)
patients (73.3%), and the highest proportion of cardiac
resynchronization therapy (CRT) systems (54%). As expected, AV
blockages were least common in the SR group with 28.2%. Conversely, the
proportion of sinus node disorders as an indication for pacemaker
implantation was highest in this group. Furthermore, considering the
type of implanted devices, it can be seen that in the SR and EL groups,
there was a comparable distribution between the implanted pacemaker
(43.8% vs. 46.4%) and defibrillator systems (56.2% vs. 53.6%), while
in the SI group there was a significantly higher proportion of implanted
pacemakers (61.6%).
When looking at the age of the implanted leads, we found the oldest
pacemaker electrodes (8.6 years) in the SR group, and the oldest
defibrillator leads in the EL group (8.7 years). In contrast, the ICD-
and pacemaker leads with the shortest implant duration were seen in the
SI group (Tab. 1).