[Management of myocardial infarction and ischemia without obstructive coronary arteries: insights from a case series].

Acute coronary syndromes typically result from the formation of atherosclerotic lesions in a large epicardial vessel, which restrict blood flow either partially or completely. These lesions can be identified through angiography, an invasive imaging technique that enables visualization of the coronary arteries. However, a small percentage of patients, usually ranging from 5% to 10%, experience symptoms and/or signs of myocardial ischemia, either acute or chronic, without significant obstructive coronary lesions visible on angiography.