The instrument to measure heart rate is called cardiovascular blood pressure monitor, which can monitor heart rate, respiratory rate, respiratory amplitude, blood pressure, average arterial pressure, oxygen saturation, and can be set to alarm function. Divided into bedside ECG monitor and central monitoring station, used for acute and critical patients' vital signs monitoring, can instantly reflect the changes of patients' vital signs, help medical staff to grasp the patient's condition at any time. Other instruments that can also measure heart rate include electronic blood pressure monitors, electrocardiographs, and 24-hour ambulatory electrocardiographs.