Commonly used data of cardiac monitors include heart rate (pulse rate), respiration, oxygen saturation, and blood pressure, and the monitored items can be identified according to the Chinese characters or English abbreviations labeled on the instrument. 1. Heart rate and pulse rate are abbreviated as ECG and PR in the English labeling of the ECG monitor, ECG is the abbreviation for electrocardiogram, and PR is the abbreviation for pulse rate. Since heart rate and pulse rate are basically the same, it is sufficient to refer to them as heart rate. When the value is abnormal, the monitor will automatically alarm. 2. RR is the abbreviation for respiration, normal adults breathe about 12-20 times per minute, when the respiratory rate is abnormal, the monitor will automatically alarm. 3. Blood oxygen saturation is referred to as SpO2, normal adult blood oxygen saturation is 96%, when lower than the value, suggesting low oxygen. 4. Blood pressure, referred to as BP, can be set up according to the patient’s condition and measured by the monitor at regular intervals. Cardiac monitor is a commonly used instrument in the clinic, and should be used under the guidance of professional physicians or nurses.