Ambulatory ECG does not require hospitalization. An ambulatory ECG test involves wearing a monitoring box or chip on the body, which is connected to the body through electrode pads and lead wires. After wearing the box for a specified amount of time, it is connected to a computer through a data line, and the information from the box is captured on the computer. The ECG data is analyzed by the computer. The ambulatory ECG is divided into 24-hour ambulatory ECG, 72-hour ambulatory ECG, and long-range wearable ambulatory ECG, and these tests do not require hospitalization. For those who have episodes of panic attacks, chest tightness and shortness of breath, and cannot catch the ECG condition during the onset of symptoms by ordinary ECG, the ambulatory ECG can be used to clarify the presence of arrhythmia and myocardial ischemia.