Objective To explore the electrocardiogram (ECG) characteristics

diagnostic clues and occurrence

mechanism of retrograde conduction of the dual atrioventricular nodal pathways(DAVNP).

Methods

2

ECG data of 22 patients conforming to the basic characteristics of antidromic DAVNP were retrospectively analyzed. Results The basic rhythm of 22 patients was ectopic rhythm or beats of different nature and origins

among them

there were 10 cases of atrioventricular junctional and ventricular escape rhythm

3 cases premature ventricular contraction

3 cases of ventricular tachycardia

6 cases of ventricular pacing

Ectopic beats can all form stable and regular Ventriculoatrial retrograde conduction of intermittent Ventriculoatrial retrograde conduction

which shows a certain degree of reproducibility. The ectopic QRS wave was followed by related retrograde P wave (P

-

)

10 patients showed two forms of P

-

9 patients showed a single form

and 3 patients could not be determined. There were two or more RP

-

interphase

with the difference greater than 0.06 s

and the maximum difference between the two RP

-

interphase was 0.11~0.44 (On average 0.24±0.09). There were 12 cases with ventricular echo beat (reciprocal beat)

3 cases showed wenckebach ventriculoatrial conduction

2 cases formed 1∶2 ventriculoatrial antidromic conduction

and 1 case showed fast and slow AVNRT. Conclusions Retrograde Ventriculoatrial conduction via DAVNP is a relatively rare electrophysiological manifestation. Diagnostic analysis and preliminary diagnosis.can be made by observing ECG characteristics. To provide a strong theoretical basis for further cinical diagnosis and treatment.