Electrocardiogram and color ultrasound can assist in the diagnosis of coronary heart disease, but if you need to confirm the diagnosis, you need to improve the coronary CT and coronary angiography, especially coronary angiography is the gold standard for the diagnosis of coronary heart disease. Electrocardiogram and color ultrasound are generally essential for physical examination of heart disease patients, electrocardiogram can only be a short-term static record, so heart disease patients should use electrocardiogram and color ultrasound to detect the changes in the heart as appropriate with a high degree of sensitivity to assist in the diagnosis of early coronary artery disease patients, and combined with clinical symptoms and coronary artery disease risk factors and symptoms to assist in the diagnosis of the synthesis. Coronary angiography is the most direct, reliable and specific method to diagnose coronary heart disease, which can clearly show whether there is stenosis of coronary artery, the site, degree and extent of stenosis, as well as the blood flow of blood vessels at the lesion, etc., and can guide the further treatment measures, but the examination method belongs to the minimally invasive type of surgery, which is traumatizing and has a certain degree of risk, and should be strictly mastered the indications. Patients with cardiac discomfort should consult a doctor promptly to avoid delayed treatment.