Stable Angina

Stable angina is myocardial ischemia caused by atherosclerotic coronary artery disease when cardiac oxygen demand rises beyond the blood flow a narrowed coronary artery can provide. The clinical signal is reproducibility—not pain intensity alone—and the nursing safety signal is any departure from that pattern. Stable angina is chest discomfort that shows up the same way every time: the same triggers, the same intensity, the same duration, and the same relief. That predictability is the whole point of the lesson, because your value on the unit is noticing the day it stops being predictable. A patient whose angina has always come on after two flights of stairs, and who now gets it walking to the bathroom, has changed categories. Recognizing that shift and escalating it is a practical-nursing action that prevents an infarction.