Coronary artery diseases encompass ischemic syndromes characterized by myocardial oxygen supply-demand mismatch due to coronary pathology; this theory categorizes these conditions into angina pectoris (stable, unstable, and Prinzmetal) based on the reversibility of symptoms relative to exertion or vasospasm. A distinct pathological state termed Myocardial Infarction is defined as coagulative necrosis of cardiac myocytes resulting from prolonged ischemia leading to transmural or subendocardial tissue death. The distinction between angina and infarction lies in the presence of irreversible cell injury versus reversible hypoxia, while the diagnosis relies on specific temporal elevations of biomarkers such as Troponin I for detecting ongoing necrosis rather than ST-segment changes alone, which are non-specific to ischemic etiology.
Stable and unstable angina, within cardiac pathology, are ischemic chest pain syndromes distinguished by their underlying mechanism and pattern: stable angina is substernal chest pain provoked reprod…