The abbreviated method of pulse commonly used in medicine is P. Pulse is a count of the number of times the blood hits the blood vessels when the peripheral blood vessels are subjected to the contraction activity of the heart, so under normal circumstances, there is one heart contraction that produces a pulse. However, in the case of low blood pressure, the blood pushed by the heart contraction is not enough to produce fluctuations on the blood vessels, in which case there will be a heart rate faster than the pulse, and the occurrence of this situation indicates that the patient is in a very critical condition. There are also patients with atrial fibrillation who have a different heart rate and pulse rate, mostly the heart rate is greater than the pulse rate. Once the heart rate and pulse rate are not the same, this situation should be further examined in detail and treated actively according to the results.