AV JUNCTION ELECTROPHYSIOLOGIC DATA IN PATIENTS HAVING PAROXYSMS OF ATRIAL FIBRILLATIONAV JUNCTION ELECTROPHYSIOLOGIC DATA IN PATIENTS HAVING PAROXYSMS OF ATRIAL FIBRILLATION
S.V.Popov,I.V.Antonchenko,V.V.Aleev
摘要(Abstract)：
<正> The aim of the study was to investigate peculiarities of AV junctionconduction in paroxysmal atrial fibrillation(AF)pts.We retrospectively assessed electrophysiologic investigations data in53 pts having paroxysmal AF.Assessment of the AV junctionconduction was performed during rapid and programmed stimulationin the setting of sinus thythm.Sixteen(30.1%)pts were revealed tohave signs of longitudinal dissociation of AV conduction which wascharacteristic of suddenly increased A_2-H_2 interval by more than 50msThe remaining pts did not reveal dual AV conduction pathways.Tenpts revealed polyfascicular antegrade AV conduction and distallydisturbed conduction which was manifested by the lengthened H_2-V_2interval to 70-150 ms during programmed stimulation performed fromthe sinoatrial zone.These pts had ventricular contractions rate of118±16.4/min in the setting AF both spontaneously induced andinduced by the stimulation which were reliably(p<0.05)lesscompared to other pts(168.6±29.4/min).Thirty three(62.2%)pts whohad no multiple AV conducting pathways revealed distally slowed(to40-60 ms)conductionas well.Thus 92.5% of pts having AF paroxysms revealed concealed AVconduction disturbance and 30.2% revealed polyfascicular one.Wedid not reveal marked tachysystole in pts having multiple AVconduction pathways and distally disturbed conduction which must betaken into account while performing modification of the AVconduction in these pts.
关键词(KeyWords)：
基金项目(Foundation):
作者(Author): S.V.Popov,I.V.Antonchenko,V.V.Aleev