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Medical Term:


Pronunciation: gat


  1. To close an ion channel by electrical (membrane potential) or chemical (neurotransmitter) action.
  2. Action of a special nerve fiber to block the transmission of impulses through a synapse, gating of pain impulses at synapses in the dorsal horns.
  3. A device that can be switched electronically to control the passage of a signal.
  4. To use a physiologic signal, such as an ECG, to trigger an event such as an x-ray exposure or to partition continuously collected data.

See: gated radionuclide angiocardiography

[O.E. geat]

See Also: cardiac gating

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.