retrograde conduction


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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.

retrograde conduction

Ventriculoatrial conduction Cardiology The propagation of depolarization from the ventricles to the atria–ie, VA conduction. See Conduction.
References in periodicals archive ?
20,21) It is typically diagnosed in childhood and usually presents as a narrow QRS tachycardia with AV dissociation, (22) but retrograde conduction to the atrium has also been found.
We also demonstrated that unidirectional (activation conduction sequence was from LA to PV-LAJ, and finally to LSPV by pacing at LA, from LSPV to PV-LAJ, and to LA by pacing at LSPVd) and bi-directional conduction (activation conduction sequence was from LSPVm to both PV-LAJ and LA as well as to LSPVd simultaneously by pacing at LSPVm), bi-directional decremented conduction as well as slowed retrograde conduction (from LSPV to LA) within LSPV and delayed conduction or conduction block from stimulation signal to local tissue potential before AF.
P waves and QRS complexes occur regularly and independently with no evidence of anterograde or retrograde conduction.