noun
pulsation
pul-SAY-shun/pʌlˈseɪʃn/
A rhythmic beating or throbbing movement.
She feels a steady pulsation in her wrist after exercising.

Etymology
The underlying verb describes repeated striking, not just a single blow. That repeated action connects directly to rhythmic throbbing, whether in the blood or another vibrating movement.
In context
I just have lightly pressed on where the radial artery is and I will count each pulsation for 30 seconds. His pulse is regular
More examples
- The pump's pulsations travel through the pipe.
- A dull pulsation in my ankle keeps me awake.
- The doctor watches for pulsations in the artery.
Forms
pulsation · pulsations
pulsate verb — To beat or throb in rhythm.