pulsate

expand and contract rhythmically; beat rhythmically; "The baby's heart was pulsating again after the surgeon massaged it"

move with or as if with a regular alternating motion; "the city pulsated with music and excitement"

produce or modulate (as electromagnetic waves) in the form of short bursts or pulses or cause an apparatus to produce pulses; "pulse waves"; "a transmitter pulsed by an electronic tube"