Heart monitor data through the heart rate, blood pressure, oxygen saturation and other values to see the patient’s state, so as to understand the patient’s vital signs. 1. Heart rate: generally on the top of the heart monitor, the upper right number is the heart rate value, the upper left is the electrocardiogram curve, the normal human heart rate is in the range of 60 to 100 beats / min. 2. Blood pressure: blood pressure can be measured on the heart monitor, usually every ten minutes will be automatically measured, usually in the lower right corner of the screen has a blood pressure test value. Usually can see two values, systolic blood pressure normal value in 90 ~ 140mmHg, diastolic blood pressure is 60 ~ 90mmHg, the data can understand whether the patient’s blood pressure is normal. 3. Oxygen saturation: 96, 98, etc. displayed on the cardiac monitor generally represents the oxygen saturation of the blood, so as to determine whether the lack of oxygen. Normal oxygen content is in 95%~100%, if it is lower than 95%, it usually represents that the patient is hypoxic, and the more hypoxic the value will be lower. Patients should note that the heart monitor data of different models, the location of the specific display data will be different, in the process of using to let the doctor for guidance.