[Cross-cultural adaptation and validation of a questionnaire on what nurses know of heart failure]

This study aims to perform the cross-cultural adaptation and to verify the content validity and stability of Nurses' Knowledge of Heart Failure Education Principles to evaluate what Brazilian nurses know of heart failure. The process of cross-cultural adaptation involved translation, synthesis, back-translation, committee's proofreading and pre-test. The following psychometric properties were assessed content validity (face), reliability through internal consistency (Cronbach's Alpha) and stability (Kappa coefficient). After the cross-cultural adaptation, the instrument was applied to 54 nurses (27 from a cardiology hospital and 27 from a general hospital). The Cronbach's Alpha was 0.7. The questions 4, 5, and 11 presented a Kappa coefficient less than or equal to 0.4, and further questions presented a Kappa coefficient superior or equal to 0.7. This questionnaire was validated and proved to be adequate to assess the knowledge of this group of professionals.