What is a characteristic of stable angina symptoms?

Stable angina is characterized by predictable symptoms that arise during physical exertion or emotional stress and are typically relieved by rest or by the use of nitroglycerin. The pattern of stable angina is generally consistent; symptoms tend to occur at similar levels of activity and resolve with rest, which indicates that the myocardial oxygen demand exceeds the supply but is relieved once the demand decreases. This predictable pattern is a key differentiator from unstable angina, where symptoms can occur unpredictably and are not consistently relieved by rest or medication. Understanding these features is crucial for effectively assessing and managing patients with angina and ensuring timely interventions.