The Collaborative International Dictionary of English v.0.48:

Pulsate \Pul"sate\, v. i. [imp. & p. p. Pulsated; p. pr. & vb.
   n. Pulsating.] [L. pulsatus, p. p. of pulsare to beat,
   strike, v. intens. fr. pellere to beat, strike, drive. See
   Pulse a beating, and cf. Pulse, v.]
   To throb, as a pulse; to beat, as the heart.
   [1913 Webster]

         The heart of a viper or frog will continue to pulsate
         long after it is taken from the body.    --E. Darwin.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

42 Moby Thesaurus words for "pulsating":
   beating, cadenced, cadent, ceaseless, chattering, constant,
   continual, in numbers, in rhythm, incessant, machine gun, measured,
   metric, oscillating, palpitant, perennial, perpetual, pitapat,
   pulsatile, pulsative, pulsatory, pulsing, rapid, regular, repeated,
   rhythmic, staccato, steady, stuttering, sustained, throbbing,
   unbroken, unceasing, unchanging, unintermitted, unintermittent,
   unintermitting, uninterrupted, unremitting, unstopped, unvarying,
   vibrating