Who invented pulses?

The first person to measure the heart beat was Herophilus of Alexandria, Egypt (c. 335–280 BC) who designed a water clock to time the pulse. He is said to have written the first fragmentary descriptions of heart rate as measured by the pulse. Herophilus wrote nine volumes of his findings, but they have been lost.

Why do we use 3 fingers to check pulse?

This has a reason: the finger closest to the heart is used to occlude the pulse pressure, the middle finger is used get a crude estimate of the blood pressure, and the finger most distal to the heart (usually the ring finger) is used to nullify the effect of the ulnar pulse as the two arteries are connected via the ...