Multiple lymph nodes in the neck check ECG belongs to the basic examination, to understand the basic condition of the patient, to prepare for the next step of treatment, and at the same time to clarify whether there is any damage to the heart. The presence of multiple lymph nodes in the neck can be due to a variety of reasons, such as cervical lymph node tuberculosis, bacterial infections, malignant tumors, etc. Some patients may require hospitalization or surgical treatment, and basic cardiac function tests should be routinely performed prior to hospitalization or surgery, and the electrocardiogram (ECG) is one of the most common tests, which can be used to assess the overall condition of the patient and to avoid the occurrence of acute cardiovascular events. ECG is one of the common clinical tests and is a basic test for patients to be admitted to the hospital. ECG is able to detect many heart-related diseases and support clinical treatment.