Psychological tension may have a certain effect on cardiography. When doing cardiography, it is generally required to be emotionally stable and avoid anxiety, nervousness or irritability. When people are nervous, their heart rate is faster and blood vessels are prone to contraction, at this time, the results of cardiography are inaccurate, and at the same time, the blood pressure may be too high, which may affect the cardiography procedure, so it is not recommended to do cardiography when you are psychologically nervous. Before the cardiography, you should have a good rest, make sure you have enough sleep, and on the day of the examination, try to reduce the amount of food as much as possible, and you should not eat too much, otherwise it may cause the phenomenon of aspiration. You should also take regular medication before the test, mainly oral antiplatelet aggregation drugs. It is recommended to consult a doctor and understand the relevant precautions before doing the cardiac imaging test, which can lead to a correct diagnosis and then targeted treatment according to the test results.