Biofeedback is defined as providing feedback about changes in the patient’s physiological state, by means of stimuli other than those used by the body, usually with the use of technology. This article presents an analysis based on the surveys regarding the awareness of Polish society about biological feedback and its effectiveness in the rehabilitation of patients with cardiac problems. The study was conducted to justify the use in the therapy on people with cardiac problems. The analysis of the patients results after cardiovascular diseases was carried out during the cardiac rehabilitation in which the biofeedback was used.