The necessity of a cardiogram depends on the patient’s specific condition, and it is best to follow the doctor’s instructions on whether to have a cardiogram or not. Cardiac imaging can observe blood vessels from multiple angles, clarify whether the blood vessels are narrowed or not, and grasp the blood vessel routing. It has become an indispensable examination tool in cardiology. However, it is not recommended for patients with chest pain, chest tightness and other discomforts to undergo cardiac imaging directly without seeking medical advice; cardiac imaging should be performed under the advice and guidance of a doctor. For general patients, it is recommended that routine tests such as electrocardiogram and echocardiogram be performed first. When there is acute myocardial infarction, unstable angina, old myocardial infarction, coronary artery CT suggests severe stenosis, etc., cardiac imaging should be carried out under the guidance of doctors to clarify the lesions. To summarize, cardiac discomfort needs timely medical treatment, whether to carry out cardiography please follow the doctor’s instructions.