The 10-year study was of 300,000 heart attack patients with a Stemi (ST-elevation myocardial infarction) – a heart attack caused by a complete blockage of a coronary artery. Stemis account for 25-40% of heart attack cases in Europe. 2016 January 6, “Heart patients 'twice as likely' to get life-saving stents in 24/7 hospitals”, in The Guardian: