Dizziness caused by coronary artery disease is a type of transient dizziness, which is caused by insufficient blood supply to the heart due to coronary artery disease, especially coronary atherosclerotic heart disease. Once ischemia, stenosis or vasospasm occurs in the coronary arteries, there will be palpitations, chest tightness and shortness of breath, and discomfort in the precordial region, along with dizziness, blurred vision and blackness in front of the eyes. Some patients may also experience nausea and vomiting at the same time, which can be relieved after rest. In addition, for dizziness caused by coronary artery disease, sublingual administration of certain drugs such as nitroglycerin can also play a certain role in relieving the dizziness.