LAUSR

The most important aspect of these guidelines is the adoption of a ‘‘new’’ classification of ischemic heart disease, categorizing the entity as either acute coronary syndromes (ACSs) or chronic coronary syndromes (CCSs). The purpose of this change is not only to highlight the dynamic nature of the ischemic heart disease process, but also to facilitate the categorization of the various possible clinical presentations. This has also led to a change in the name of the guidelines: they now refer to the diagnosis and management of ‘‘CCSs’’, in contrast to ‘‘stable coronary artery disease’’ in 2013. Specifically, CCSs encompass 6 situations with different risks for adverse cardiovascular events (table 1); this risk can change over time and, of course, decrease with revascularization and the appropriate use of secondary prevention measures. In addition, the guidelines consider the pretest probability of coronary artery disease (CAD) according to age, sex, and type of symptoms.