9/21/2023 0 Comments Wpw ecg findingsSome have suggested that the RP interval (distance between the R-wave and retrograde P-wave) can help distinguish between AVRT and AVNRT. Orthodromic AVRT is essentially indistinguishable from the more common AV nodal reentrant tachycardia (AVNRT) on the surface electrocardiogram (where the reentry circuit is confined to the tissue of the AV node). It should be noted that there is more than one type of concealed conduction and patients can have more than one bypass tract. These patients will not display a delta wave on the surface electrocardiogram! There are patients for whom the bypass tract only works in the retrograde direction. This can happen in patients with so-called “ concealed conduction“. This creates a “revolving door” or reentry circuit (4) that usually results in a narrow complex tachycardia. With orthodromic AVRT (also called orthodromic circus movement tachcycardia) antegrade conduction proceeds normally down the AV conducting system (2) and retrograde conduction proceeds up the bypass tract (3). Orthodromic AV reentrant tachycardia (AVRT) Let’s move on to the tachyarrhythmias associated with Wolff-Parkinson-White syndrome.
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