The purpose of this evidence-based practice (EBP) project was to describe the effects of an American Heart Association evidence-based protocol in increasing certified nursing assistants’ (CNAs) competency in accurate blood pressure measurement in a long-term care unit at one of the major geriatric centers in New York City. The Iowa Model of implementation strategies for Evidence-Based Practice (Cullen & Adam, 2012) guided the implementation of the project. Thirty CNAs were selected using convenience sampling participated in the EBP project, then BP measurement competency conducted with the assessment tool by Dickson and Hajjar (2007) before and after protocol education. The competency mean score before the EBP education was 17.62, the competency mean score after the EBP education was 29.29, and the mean score difference was 11.67. There were no significant differences in competency score based on participants’ gender, age and education level. These results support the literature findings that EBP education and training was effective to increase the competency of CNA’s in accurate blood pressure measurement.