| 释义 |
gating mechanism gat·ing mech·a·nism1. occurrence of the maximum refractory period among cardiac conducting cells approximately 2-mm proximal to the terminal Purkinje fibers in the ventricular muscle, beyond which the refractory period is shortened through a sequence of Purkinje cells, transitional cells, and muscular cells; gating mechanism may be a cause of ventricular aberration, bidirectional tachycardia, and concealed extrasystoles; 2. a mechanism by which painful impulses may be blocked from entering the spinal cord. Compare: gate-control theory. gat·ing mech·an·ism (gāt'ing mek'ă-nizm) 1. Occurrence of the maximum refractory period among cardiac conducting cells approximately 2 mm proximal to the terminal Purkinje fibers in the ventricular muscle; may be a cause of ventricular aberration, bidirectional tachycardia, and concealed extrasystoles. 2. A mechanism by which painful impulses may be blocked from entering the spinal cord.
Compare: gate-control theory |