nitiatives to develop patient-centered approaches to health care are a priority that may have profound effects on health care, particularly within value-based purchasing and risk-sharing models. Patient-centered care requires more direct engagement of patients in their own care, including treatment decisions. Patient participation in treatment selection for vascular procedures has not been characterized, and the potential effects of greater patient involvement are unknown. We conducted a prospective study among patients undergoing vascular procedures to identify important sources of information and characterize experienced vs desired decision-making roles.