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 ?
* 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).
P waves and QRS complexes occur regularly and independently with no evidence of anterograde or retrograde conduction. The rounded sagging of the ST segments, with short QT intervals (0.26 s) and low T waves, is typical of digitalis effect, and digitalis excess is known to produce both conduction abnormalities and tachyarrhythmias in patients with cardiac disease.
Sometimes we can observe an atrial retrograde conduction (PMK VVI) that generates a PMK syndrome.
a prolonged rest period in the upper AV junction following retrograde conduction." (1) Their final conclusion stated, "The application of the concept of supernormal conduction in conjunction with that of concealed conduction and of unidirectional block permits a satisfactory interpretation of some otherwise inexplicable features of AV block encountered in clinical electrocardiography." (1)

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