Delirium in cardiovascular medicine

Delirium is a common yet underrecognized neuropsychiatric syndrome in cardiovascular medicine associated with prolonged hospitalization, increased mortality, and long-term cognitive decline. Patients undergoing interventional or surgical cardiovascular procedures-such as transcatheter aortic valve replacement, surgical aortic valve replacement, coronary artery bypass grafting, or percutaneous coronary interventions-may be particularly vulnerable to its development. Delirium incidence varies widely across cardiovascular procedures, influenced by patient characteristics, procedural invasiveness, and diagnostic methodology. Risk factors include advanced age, baseline cognitive impairment, cerebrovascular disease, extended operative times, perioperative complications, and systemic inflammation. Diagnostic tools such as the Confusion Assessment Method (CAM) and the Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) score are established but underutilized in the diagnosis of delirium. While preventive strategies emphasizing non-pharmacological, multicomponent approaches-such as early mobilization, cognitive stimulation, and sleep hygiene-are supported by strong evidence, preventive use of pharmacologic agents remains controversial. Pharmacologic treatment is reserved for select cases; dexmedetomidine shows benefits in intensive care unit settings, while antipsychotics like quetiapine and risperidone may be used cautiously. Overall, delirium poses a significant clinical challenge in cardiovascular medicine and requires a proactive, interdisciplinary approach. Systematic risk assessment and multimodal preventive strategies should be the standard of care, while pharmacologic treatment should be symptom- and context-specific. Further high-quality studies are needed to inform evidence-based guidelines tailored to cardiovascular populations. The present state-of-the-art review summarizes the current literature on the epidemiology, mechanisms, clinical manifestations, diagnosis, prevention, and treatment of delirium in cardiovascular medicine. By integrating findings and interdisciplinary expert discussions from interventional cardiology, cardiac surgery, and psychiatry, it aims to define the unique vulnerability of this patient population, highlight critical knowledge gaps, and lay the foundation for developing targeted, evidence-based management strategies.