Questions of social justice and health-care costs are some of the concerns of society. The cost caused by cardiovascular diseases can have an enormous impact, and it is important to know what patients think about illness costs when they are hospitalized. Two interviews were realized in a longitudinal study, in a sample of 106 patients submitted to expensive techniques in Cardiology (Portugal), to understand the patients’ perception about the health costs and behavior changes based on awareness. We can conclude that cardiovascular diseases are a global phenomenon that generally affects all social groups. From those interviewed, 83% of the patients agree about getting information concerning the treatments and intervention costs during hospitalization because the information about costs can bring the necessary tools for improvement in patients and health resources; 70.8% of the patients say that this information could bring awareness to the patient’s life, enhancing responsibility and personal autonomy.