what is stable angina
Angina is pain, discomfort or pressure in the chest, and doctors usually describe it as chronic stable angina or unstable angina. 1  Chronic stable angina is a form of chest discomfort that happens when your heart is working hard and needs more oxygen, such as during exercise. 2  The pain goes away when you rest.ngina is pain, discomfort or pressure in the chest, and doctors usually describe it as chronic stable angina or unstable angina. 1  Chronic stable angina is a form of chest discomfort that happens when your heart is working hard and needs more oxygen, such as during exercise. 2  The pain goes away when you rest.