Study Method / Design Quantitative research is conducted when there is a need for the most accurate numerical data, and this method involves the collection and thorough analysis of primary information. In their study, Disher et al. (2014) utilize the quantitative / quasi-experimental design to explore the impact of a unit-stimulation on nurses’ ability to recognize deteriorating patients. The essence of this quantitative research is composed of clear mathematical and statistical models, which allows having precise quantitative values ​​of the studied indicators (LoBiondo-Wood, Haber, Berry, & Yost, 2013). The key advantage of such a method that also related to the given study is a large sample of respondents to quantify the behaviors of nurses and patients as well as their reactions to interventions. Even though a structured questionnaire is provided to obtain information quantitatively determining the number and percentage of respondents for each specific category, respondents’ lack of opportunity to clarify some questions may be regarded as a disadvantage. Problem Statement Recently, the review of a community hospital revealed that patients are often transferred from step-down cardiovascular units to intensive care units. It was suggested that proper self-care and nursing management are the main prerequisites of such a situation. Furthermore, the cause of these transitions – respiratory distress – was discovered. The question regarding the early identification of deteriorating patients became evident. Nursing professional development (NPD) specialists organized special training for nurses working with patents having cardiovascular disease. In particular, they were educated to identify the first signs of breathing worsening and other respiratory health concerns. The need to assess the results of education and its role in managing patients provides the basis for conducting this study. Purpose Statement In the view of the discussed problem statement, the specified quasi-experimental was initiated with the aim of revealing the role of nurses. The unit-based and high-fidelity simulation was initiated to conduct the study and determine the impact of this intervention on nurses’ ability to assist patients when they encounter health deterioration. It should also be stressed that the cardiovascular unit was selected as the target setting, while simulation impact evaluation was put in the core of the research. The purpose statement seems to be relevant to the needs of the mentioned healthcare organization as it is likely to address the mentioned problem. Independent Variable The independent variable in this study is a unit-based simulation that implies the use of technology to create the realistic environment as a means of staff training and further intervention planning. As noted by Disher et al. (2014), the unit-based simulation develops decision-making skills and allows eliminating the existing errors. The utilized simulation may also be regarded as a low- to medium fidelity simulation with the focus in a special area. One more study that also used this variable shows its importance and feasibility, as reported by Fore, Sculli, Albee, and Neily (2013). Most importantly, the issue of patient safety is also implemented within the mentioned variable – informed consent and other related confidentia