Angiography is not necessary to test for premature heartbeats, but cardiography is required if coronary artery disease is present. A cardiac angiogram is usually not needed if the diagnosis is simply the presence or absence of premature heartbeats. At present, the diagnosis can be analyzed by doing electrocardiogram, dynamic electrocardiogram, as well as plate exercise load test and echocardiogram, which can accurately determine whether there is any arrhythmia or not. If there is ischemia of the heart found through the above tests, coronary angiography should be done as soon as possible, which can accurately determine the degree of myocardial ischemia and exclude coronary heart disease. In addition, cardiac magnetic resonance imaging is also needed to assess whether there is cardiomyopathy. The presence of premature heart beats suggests timely medical treatment, according to the doctor’s instructions for diagnosis and treatment.