pulsation

noun

1.
(electronics) a sharp transient wave in the normal electrical state (or a series of such transients)
impulse pulse pulsing
Derived from:
pulsate
2.
a periodically recurring phenomenon that alternately increases and decreases some quantity
3.
the rhythmic contraction and expansion of the arteries with each beat of the heart
quob beat heartbeat pulse
Derived from:
pulsate