environment applies to all the external factors that have a formative influence on one's physical, mental, or moral development. the kind of environment that produces juvenile delinquents; milieu applies especially to the physical and social surroundings of a person or group of persons.
Myocardial ischemia is an imbalance between myocardial oxygen supply and demand. Left untreated, it results in angina pectoris, myocardial stunning, myocardial hibernation, ischemic preconditioning, postconditioning, or under the most severe instances, acute coronary syndrome and myocardial infarction.
The term refers to chest pain or discomfort that occurs when the heart muscle is not getting enough oxygen-rich blood for a short period of time. The inadequate blood flow is caused by narrowed coronary arteries, which are the vessels that supply blood to the heart. A bout of myocardial ischemia is not a heart attack, but it means that you're more likely to have a heart attack than someone who doesn't have myocardial ischemia.