In terms of angina classification, what does level 4 signify?

In the context of angina classification, level 4 signifies severe angina. This classification indicates that the individual experiences angina at rest or incurs it with minimal exertion. This means any physical activity, no matter how light, can trigger angina symptoms, demonstrating a significant impact on the patient's daily life and functioning. It's crucial to recognize this level of severity, as it often signals the need for urgent medical evaluation and management to alleviate symptoms and prevent further complications. Levels of angina provide insight into the seriousness of the cardiovascular condition and guide treatment decisions accordingly.