While 6-month mortality for STEMI continued to decline until 2015, mortality improvements for NSTEMI patients appear to have plateaued since 2010.
Over the past 20 years, 6-month mortality after acute myocardial infarction has decreased considerably for patients with STEMI and NSTEMI. Mortality figures continued to decline in patients with STEMI until 2015, whereas mortality in patients with NSTEMI appears stable since 2010.
Puymirat et al. (Mon,) studied this question.