Master Study Investigating the Guiding Catheter Selectra 3D

Inclusion Criteria: * Standard indication for de novo pacemaker or cardiac resynchronization implantation * The patient is intended for guiding catheter based implantation of a pacemaker system * Patient is able to understand the nature of the study and has provided written informed consent * Patient is willing and able to perform all follow up visits at the study site * Patient is willing and able to use the CardioMessenger and accepts the BIOTRONIK Home Monitoring® concept Exclusion Criteria: * AV block with no escape rhythm or broad QRS escape rhythm * Standard contraindications for use of the investigational devices: * Existing or possible occlusion of the coronary vessels or unsuitable anatomy of the coronary veins * Active systemic infection * Mechanical tricuspid valve prosthesis or severe tricuspid valve diseases * Intolerance against dexamethasone acetate * Planned cardiac surgical procedures or interventional measures in addition to the study procedure within the next 6 months * Expected to receive heart transplantation or ventricular assist device within 1 year * Patient is pregnant or breast feeding * Less than 18 years old * Participating in another interventional clinical investigation * Life-expectancy is less than 1 year