ACE and myocardial infarction: Reasons for this are because different indicator definitions were used or because QOF indicators might have been removed over time, such as the percentage of patients with myocardial infarction treated with an angiotensin converting enzyme inhibitor (or angiotensin II receptor blocker if intolerant to an angiotensin converting enzyme inhibitor), aspirin or an alternative antiplatelet treatment, β blocker, or statin, retired in April 2015 in England.