The goal of this clinical trial is to examine the effects of sensory and cognitive stimulation on physiological, psychological, and functional recovery in adult patients after cardiac surgery who are treated in the intensive care unit (ICU). The main questions it aims to answer are: * Does sensory and/or cognitive stimulation reduce anxiety and improve hemodynamic stability in ICU patients? * Does it enhance physical function and independence during early rehabilitation in the ICU? Researchers will compare four groups: 1. Standard care (control), 2. Cognitive stimulation, 3. Auditory stimulation (music), 4. Multisensory stimulation (touch + smell) to assess which intervention is most effective in improving recovery parameters. Participants will: * Be randomly assigned to one of four groups during early mobilization in the ICU * Receive a 30-minute intervention session depending on group assignment * Be evaluated for heart rate, blood pressure, oxygen saturation, anxiety (VAS), physical function (PFIT, FIM), and satisfaction before and after the session