DEFINITION OF QUALITY OF LIFE: In recent years, quality of life has become a very important measure of treatment of disease and successful therapy, regarding not only general health of an individual patient but also of the whole population. In 1993 the WHO proclaimed "Vision of health for all", as "Add years to life" but also "Add life to years", emphasizing quality of life to be as important as life duration. Although the remaining life expectancy in patients with cardiovascular disease is prolonged, there is still medical challenge: "How to improve quality of life in these patients?".
Measurement of quality of life: Quality of life can be defined as the patient's perception of impact of disease and concomitant therapy and procedures on his physical and working capacity, emotional role, social communication and general health.
Different types of standardized questionnaires for quality of life evaluation: It can be measured by general health questionnaires and specified questionnaires for disease. Questionnaire SF-36 is regarded as one of the most reliable, considering the great number of publications.
Conclusion: The most important step in complicated evaluation of quality of life is the adequate selection of questionnaire with a high confidence.