anterograde conduction

(redirected from antegrade conduction)

conduction

 [kon-duk´shun]
conveyance of energy, as of heat, sound, or electricity.
aberrant ventricular conduction the temporary abnormal intraventricular conduction of supraventricular impulses; called also ventricular aberration.
aerial conduction (air conduction) conduction of sound waves to the organ of hearing in the inner ear through the air.
anterograde conduction
1. forward conduction of impulses through a nerve.
2. in the heart, conduction of impulses from atria to ventricles.
atrioventricular conduction (AV conduction) the conduction of atrial impulses through the atrioventricular node and the His-Purkinje system to the ventricles.
bone conduction conduction of sound waves to the inner ear through the bones of the skull.
concealed conduction conduction that is not seen on the surface electrocardiogram but may be detected by its effect on subsequent impulses; common examples are the incomplete penetration of the AV junction during atrial fibrillation, the Wenckebach type penetration during atrial flutter, and the retrograde incomplete penetration following ventricular ectopic beats.
decremental conduction a gradual decrease in the stimuli and response along a pathway of conduction; it occurs in nerve fibers with reduced membrane potentials.
retrograde conduction transmission of a cardiac impulse backward in the ventricular to atrial direction; particularly, conduction from the atrioventricular node into the atria.
saltatory conduction the rapid passage of an electric potential between the nodes of ranvier in myelinated nerve fibers, rather than along the full length of the membrane.

an·ter·o·grade con·duc·tion

conduction in the expected normal direction between any cardiac structures.
References in periodicals archive ?
A left sided accessory pathway allows retrograde conduction from the ventricles to the atria while antegrade conduction occurs through the atrio-ventricular node and the right Tawara branch [3].
During orthodromic supraventricular tachycardia, antegrade conduction occurs via the AV node, and retrograde conduction occurs via an accessory AV connection1.
Masked preexcitation was defined as overt antegrade conduction over AP masked by the normal AV conduction.
The preablation ECG showed fusion of antegrade conduction from both the left sided accessory pathway (AP) and AV node with predominance from left sided accessory pathway.
* Orthodromic atrioventricular reciprocating tachycardia (AVRT), or Wolff-Parkinson-White syndrome, is a narrow QRS complex tachycardia in which antegrade conduction is via the AV node and retrograde conduction is via an accessory pathway (bundle of Kent).
This pattern suggests antegrade conduction down the fast pathway and retrograde conduction up the slow pathway in someone with dual A-V nodal pathways.
The P-R interval preceding each wide QRS is normal (0.16 to 0.17s as measured in lead II), rather than the short P-R of both the initial description by Cohn and Frazer in 1913 (2) and the more complete description in 1930 by Wolff, Parkinson, and White of their eponymous syndrome (3) that was subsequently determined to be due to ventricular preexcitation.4,5 Thus, antegrade conduction in the bypass tract is slower than usual, but it is faster than the A-V nodal conduction that is slowed by A-V nodal dysfunction.
Atrial fibrillation is the second most common arrhythmia in patients with symptomatic WPW, with an incidence of 11.5%.[4] This may degenerate in to ventricular fibrillation owing to rapid antegrade conduction through the AP if the refractory period is short.