Is stable angina attack time fixed?

Stable angina refers to stable angina pectoris. The onset time of stable angina pectoris is not fixed.

Stable angina pectoris is usually caused by insufficient blood supply to the coronary arteries. It is usually more likely to occur during physical activity or emotional agitation. Activities such as walking, running, and upstairs will increase the load on the heart, resulting in increased myocardial oxygen demand, which may trigger angina attacks. Secondly, emotional agitation, stress, and anxiety can trigger autonomic nervous system reactions, leading to coronary artery spasm or contraction, which may trigger angina attacks. Therefore, the onset time of the disease is not fixed.