A normal heart monitor in a hospital has a waveform on the left and numbers on the right. Waveform on the left: The waveform on top is the pulse, a waveform that is reflected based on the beating of the heart, plus it can tell if there are premature beats. The waveform below is the respiratory waveform, which is mainly based on the rhythm of human breathing. The numbers on the right: the top one is probably the pulse, which reflects the number of specific pulses. Below the pulse are two numbers that reflect the blood pressure. Basically, the cardiac monitor is measuring blood pressure once every 10, 20 or 30 minutes, and this value is constantly changing. The third column may be blood oxygen, which is used to see the oxygen saturation in the blood. The fourth column may be respiration, which reflects the current respiratory rate of the person.