Trust is essential in human relationships including those within healthcare. Recent studies have raised concerns about patients’ declining levels of trust. This article will explore the role of trust in decision-making about cardiopulmonary resuscitation (CPR). In this research thirty-three senior doctors, junior doctors and division 1 nurses were interviewed about how decisions are made about providing CPR. Analysis of these interviews identified lack of trust as one cause for poor understanding of treatment decisions and lack of acceptance of medical judgement. (...) Two key implications emerged from the analysis. First, before embarking on a discussion about CPR it is essential to establish trust between the doctor and the patient/family. Secondly, it is essential that the CPR discussion itself does not undermine trust and cause harm to the patient. (shrink)