Which of the following is NOT a symptom of stable angina?

Stable angina is typically characterized by predictable episodes of chest pain that occur during physical exertion or stress and are relieved by rest or the use of medications such as nitroglycerin. The key features of stable angina include pain experienced during activities like exercise, which resolves when the individual decreases their activity level or rests.

In this context, the symptom of pain that increases with rest does not align with the characteristics of stable angina. In fact, pain typically exacerbates with exertion due to increased myocardial oxygen demand and diminishes with rest or appropriate treatment. Therefore, saying that pain increases with rest is inconsistent with the usual presentation of stable angina, making it the correct answer to identify as a symptom that does not belong to stable angina.