Background: Resting heart rate (which ranges from 60 to 80 bpm) is one of the simplest cardiovascular parameters, and has been considered as a predictor of cardiovascular and all-cause mortality.
Chest pain is mentioned as one of the main complaints reported by patients admitted to the Emergency Department (ED). The demand for providing care to patients with cardiac chest pain is related to the significant impact that heart diseases have on the world population, as they are considered to be the leading cause of death in Brazil and worldwide. 1 In order to meet this demand, a triage scale was created, in these departments, based on the guidelines established by the National Humanization Policy (PNH -Política Nacional de Humanização) and QualiSUS. These determinations include the implementation of a patient classification screening and/or triage service in the ED, 2 pursuant to the law published by the Ministry of Health under Ordinance GM/MS No. 2048No. /2002 In general, applying scales/protocols that stratify the risk across five levels has been recommended, as this offers improved creditability, validity and reliability in the assessment of the patient's clinical status. 4,5
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.