Stable angina or chronic angina is the most common type of angina and it usually happens when the patient has greater than or equal to 70% stenosis, meaning 70% of the artery is blocked by plaque buildup.

稳定型心绞痛/慢性心绞痛是最常见的心绞痛类型，通常发生于病人有>=70%狭窄时，即动脉管腔被形成的斑块阻塞70%。