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Old 02-15-2013
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EKG Difference Between WPW and AVRT

What exactly is the difference between Wolf Parkinson White WPW and Atrioventricular reciprocating tachycardia AVRT? They both use an accessory pathway. They both can be anterograde or retrograde. I have always been confused by this. Any help differentiating the two?
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Old 02-15-2013
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Both are due to accessory pathway which is results in a reentrant pathway causing tachycardia.

AVNRT has two paths one fast, and one slow in the same node + no deltas waves in ECG.
WPW has completely different pathway and is marked by delta waves on ECG + narrow complex tachycardia.
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Old 02-15-2013
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Thank you for your response.

However, I was asking for the difference between WPW and AVRT, not the difference between WPW and AVNRT. AVNRT is totally different since it has to do with the AV Node and the problem lies there. I understand that.

AVRT and WPW though seem like the same thing. Almost as if WPW BECOMES AVRT during times of tachycardia. It seems like WPW is a predisposition to becoming AVRT.
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Old 02-15-2013
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I think WPW and AVRT are same
That's all what i known
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Old 02-15-2013
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This and this might help.

Quote:
Most cases of regular wide-complex AVRT (AV re-entry tachycardia) associated with WPW syndrome that are treated with adenosine consequently are converted to sinus rhythm, though adenosine may induce atrial fibrillation, and DC cardioversion equipment should be available.
AF in patients with WPW syndrome is very common and has an incidence of 11-38%. It is also the deadliest dysrhythmia for these patients because of the possibility of deterioration into ventricular fibrillation (VF).
Another concerning feature of AVRT in patients with WPW is that it can disorganize into AF, which can have disastrous consequences in patients with accessory AV pathways capable of antegrade conduction. Atrial impulses can reach an AP at a rate of 300-400 times per minute and may result in hemodynamic instability due to rapid rates of ventricular response, far in excess of that allowed by the AV node-His-Purkinje axis.[14]
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Last edited by Novobiocin; 02-15-2013 at 12:54 PM.
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Old 02-17-2013
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Yeah, it seems from that quoted paragraph that WPW becomes AVRT. I think they are basically the same. More like WPW is the disease and AVRT is the symptom. I am sure there are other causes of AVRT besides just WPW and other symptoms of WPW besides AVRT, but there is a definite link that WPW can present with AVRT.

Simple answer - AVRT is one possible symptom of WPW.
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