The project "Investigating Quality of Life and the Influence of Stress on the Postoperative Course of Patients After Device Implantation" aims to investigate the relationship between stress and the postoperative healing process of patients who have had a medical device implanted. These devices include pacemakers for the treatment of bradycardia, implantable cardioverter-defibrillators (ICDs) for the treatment of tachycardia in primary and secondary prevention, and cardiac resynchronization therapy (CRT) devices and event recorders. The study will analyze the influence of stress on the postoperative course, potential complications, and overall quality of life. A combination of medical examinations and surveys will be used to analyze how psychological stress influences the physical healing process and which measures can contribute to improving quality of life and treatment success. The surgical procedure for implanting devices is not part of the study; this is an observational study.