What is antegrade and retrograde conduction?
During orthodromic supraventricular tachycardia, antegrade conduction occurs via the AV node, and retrograde conduction occurs via an accessory AV connection1.
What is anterograde conduction?
1. forward conduction of impulses through a nerve. 2. in the heart, conduction of impulses from atria to ventricles.
What is cardiac decremental conduction?
Decremental Conduction: Decremental conduction denotes less and. less effective propagation of an impulse due to. a progressive decrease in membrane potential and velocity of rise of the action potential.
What is antegrade conduction of an accessory pathway?
Accessory pathways are microscopic muscular bundles that connect the atrium and ventricle, providing a “bypass” of the normal conduction system. Manifest pathways, those capable of antegrade conduction, are present in the Wolff-Parkinson-White (WPW) syndrome.
What is retrograde conduction in the heart?
VA conduction, also named Ventriculoatrial conduction and sometimes referred to as Retrograde conduction, is the conduction backward phenomena in the heart, where the conduction comes from the ventricles or from the AV node into and through the atria.
What is retrograde amnesia and anterograde amnesia?
Anterograde amnesia (AA) refers to an impaired capacity for new learning. Retrograde amnesia (RA) refers to the loss of information that was acquired before the onset of amnesia.
What is decremental transmission?
Decremental conduction is a term used to refer to an impaired conduction that occurs in nerve fibers. The impaired conduction is characterized by a gradual decrease in the stimuli and response along the pathway of conduction.
What does decremental conduction mean?
the exponential decay in the size of a membrane potential with distance from the site of stimulation when a subthreshold stimulus is applied to an axon. Compare nondecremental conduction.
Is retrograde conduction normal?
The prevalence of ventriculoatrial (VA) conduction varies widely from nearly 20% to 90%, depending on the population studied. 1, 2, 3, 4, 5, 6 Most of these studies were performed in patients with implanted cardioverter-defibrillators or pacemakers.
What is AVRT in cardiology?
AV reentrant (or reciprocating) tachycardia (AVRT) is a reentrant tachycardia with an anatomically defined circuit that consists of two distinct pathways, the normal AV conduction system and an AV accessory pathway, linked by common proximal (the atria) and distal (the ventricles) tissues.