Percutaneous coronary interventions (PCI) provide immediate relief of symptoms and improve the functional capacity of many people with coronary heart disease. Although patients may experience a quick recovery, continuity of care from hospital to home is challenging due to rapid discharge from hospital. During a short periode of time, patients need to adjust their lifestyle, incorporate new medication, and acquire new support. Despite this fact, few studies have investigated cardiac patients' experiences of care across the interface between primary and secondary healthcare systems. How patients experience their physical and mental health, and how this relates to continuity of care, adherence to treatment and adverse events is also scarcely studied. This prospective register based research project is organized in ten sub-studies, each of which supports the main objective; to investigate continuity of care, adherence to treatment and self-reported health in patients undergoing PCI and to determine associations with future health outcomes. This study will provide new knowledge on the post-discharge status for patients treated for PCI and form the basis for interventions aiming to optimize patient continuity of care, adherence to treatment and health outcomes.