Pr in medical cardiac monitoring generally refers to being in the process of monitoring pulse rate and heart rate. Pr stands for pulse rate and refers to the number of peripheral arterial pulses per minute monitored by the sensor on the pulse-oxygen clamp, while the heart rate is also recorded by the cardiac monitor. The two values are normally the same, and inconsistency indicates that an abnormality exists that requires further examination. pr medical cardiac monitoring generally means that the patient is in the process of continuous medical monitoring of pulse rate and heart rate, can continuously monitor the patient’s heart rate and pulse rate changes, the advantage of doing so is that in a heart attack real-time monitoring of the heart rate and pulse rate changes for the physician to assess the condition of play an important role in reference to hospitalized patients with heart disease.