There is still some danger after stenting for unstable angina, although the danger is relatively low. This is because patients with unstable angina undergo stent implantation only to improve their symptoms and keep the coronary arteries in a dilated state, but it does not lead to a cure, and it cannot be ruled out that the arteries may narrow again at a later stage, which may lead to a recurrence of unstable angina. Therefore, even with cardiac stent implantation, there may still be a danger present. However, for patients with unstable angina, the risk is relatively less after having a cardiac stent implanted, and the probability of arterial stenosis or blockage recurring afterwards is also significantly reduced. Patients with unstable angina need to be observed regularly after stent implantation. Once symptoms such as chest tightness, chest pain, and respiratory distress occur, they need to consult a doctor as soon as possible, and then go through cardiac imaging and cardiac ultrasound to find out whether their condition has recurred.