Coronary artery spasm may occur with subsequent myocardial infarction, dysrhythmia, or cardiac arrest. Significant hypercalcaemia can cause ECG changes mimicking an acute myocardial infarction. Focal recruitment of macrophages occurs after the onset of acute myocardial infarction. Types include stable angina, unstable angina, myocardial infarction, and sudden cardiac death. It is associated with an increased risk of stroke, myocardial infarction, atherosclerosis and hypertension. CS is most commonly precipitated by acute myocardial infarction. The pain associated with myocardial infarction may be treated with nitroglycerin or morphine. Death is often a consequence of kidney failure, myocardial infarction, or stroke. CABG does not prevent myocardial infarction (heart attack). A myocardial infarction requires immediate medical attention. Aspirin has been studied extensively in people considered at increased risk of myocardial infarction. Noninvasive imaging plays an important role in the diagnosis and characterisation of myocardial infarction. The symptoms of gastritis may be a presentation of a myocardial infarction. Both of these are effective in reducing significantly the mortality of myocardial infarction. It is known to decrease mortality associated with acute myocardial infarction by at least 50%.