Pacemaker complications included lead dislodgement or need for repositioning (in 3 ODO patients and 4 DDD patients), subclavian vein thrombosis in 1 (ODO), and pericardial tamponade in 1 (DDD).

The interaction between the S-ICD system and the transvenous pacemaker system is not fully understood. The authors report a case of S-ICD implantation in a patient with ccTGA and a DDD pacemaker.

The interaction between the S-ICD system and the transvenous pacemaker system is not fully understood. The authors report a case of S-ICD implantation in a patient with ccTGA and a DDD pacemaker.

Two patients initially paced in DDD mode were changed to biventricular pacing as their heart function deteriorated significantly under permanent right ventricular pacing for more than 10 years.

Patients with sinus node dysfunction and an indication for a first-time dual chamber (DDD) pacemaker were included from 11 pacemaker implanting centers in Denmark between May 2014 and June 2021.

Patients with sinus node dysfunction and an indication for a first-time dual chamber (DDD) pacemaker were included from 11 pacemaker implanting centres in Denmark between May 2014 and June 2021.