= angiotensin-converting enzymes. These are blood pressure-lowering drugs which, in addition to lowering blood pressure, are also responsible for relieving the heart. For this reason, they are also administered in the treatment of cardiac failure. They improve the prognosis in the post-treatment of large infarctions, especially in the treatment of anterior myocardial infarctions, by promoting the adaptation of the diseased heart to the new situation. A dry cough is the most common side effect. In this case or in the case of other serious side effects, alternative preparations (known as ATII antagonists) can be used.