Angina Pectoris Classification Criteria
Aug 24, 2022
Source: Cainiu Health
Dr. Li Man
Introduction
Angina pectoris can be classified into four functional classes. Class I angina refers to angina that is not provoked by ordinary physical activity but may occur after strenuous exertion, manifesting as chest tightness and chest pain. Class II angina indicates a slight limitation of the patient’s daily activities, while Class III angina signifies a marked limitation of daily activities, resulting in angina attacks.
The term “angina pectoris” (literally “chest constriction”) often evokes the impression of intense, unmistakable pain—as if the discomfort were literally gripping the heart. Literally interpreted, it suggests severe pain that typically causes significant distress to the patient. So, what are the classification criteria for angina?
Angina Classification Criteria
Angina is classified into four functional classes: • Class I: Ordinary physical activity does not provoke angina; symptoms such as chest tightness or chest pain occur only during strenuous exertion. • Class II: The patient’s daily activities are mildly limited. • Class III: The patient’s daily activities are markedly restricted, with angina occurring even during minimal exertion. • Class IV: Angina occurs at rest, manifesting as chest tightness or chest pain without any physical exertion. Additionally, angina may be categorized by etiology as stable (exertional), unstable (spontaneous), or mixed angina. Patients with angina should actively adhere to prescribed pharmacotherapy. Commonly used medications include antiplatelet agents, coronary vasodilators, and drugs that reduce myocardial oxygen demand.
Treatment of angina includes immediate management during an acute episode: patients should lie down promptly and take sublingual nitroglycerin or isosorbide dinitrate tablets to improve myocardial blood supply and relieve pain. For long-term management, patients typically require chronic medication, including beta-blockers (e.g., sustained-release metoprolol succinate), calcium channel blockers (e.g., amlodipine), and enteric-coated aspirin. The primary underlying cause of angina is coronary artery atherosclerosis—characterized by plaque formation within the arterial wall. As plaques accumulate and progressively narrow the coronary lumen, the risk of angina increases proportionally.
Patients are advised to follow a light, low-fat diet and seek prompt medical evaluation if symptoms worsen. We hope this information proves helpful.
