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2. selection of electrical signals by a gate, which passes signals only when a control signal, the gate pulse, is present, or which passes only signals with certain characteristics, such as a pulse height.
3. substrate-binding– or ligand-binding–induced opening and closing of a biologic membrane channel, believed to be due to conformational changes in proteins lining the channels.
cardiac gating selective acquisition of cardiac function information at specific points in the cardiac cycle by using information from the electrocardiographic signal to time the cardiac cycle and control image sampling. It has been used in digital subtraction angiography, computed tomography, nuclear cardiology, and magnetic resonance imaging.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
using an electronic signal from the cardiac cycle to trigger an event, such as in imaging separate phases of cardiac contraction.
Farlex Partner Medical Dictionary © Farlex 2012
car·di·ac gat·ing(kahr'dē-ak gāt'ing)
Using an electronic signal from the cardiac cycle to trigger an event, such as in imaging separate phases of cardiac contraction.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
Medical image information consistently collected during a specific phase of the cardiac cycle.
See also: gating
Medical Dictionary, © 2009 Farlex and Partners