What are the evidence-based results that have provided impetus for the current guideline?
The evidence-based results that have provided impetus for the current guideline include compelling evidence-based results from recent clinical trials and revised practice guidelines, as well as results from recent clinical trials. These results provide the basis for the 2006 recommendations with evidence-based results2 165 (Table 1). Classification of recommendations and level of evidence are expressed in ACCF/AHA format, as detailed in Table 2.