STUDY OF RELATIONSHIP BETWEEN SUPERNORMAL ATRIAL CONDUCTION AND ATRIAL TACHYARRHYTHMIA

The purpose of this study was to investigate the relationshin between supernormalatrial conduction(SNC)and atrial tachyarrhythmia.To obereve the SNC,supernomal atrial conduction zone(SNCN)and maximum decrease in conduction36,female 39)with tachyanhythmis or polpitation.Their ages ranged from 21 to65 years(41.27±13.29).All patients had no organic heart disease.Result:Atrial tachyarrhythmia(atrial tachycardia,atrial flutter and atrialfibrillation)was induced in 10 patients with history of atrial techarrhythmia(group Ⅰ).18 of 65 patients without history of atrial tachyarrhythmia had theinduced atrial tachyarrhythmia(group Ⅱ),remaining 47 patients had no theinduced atrial tachyarrhythmia(group Ⅲ).Compered with the group Ⅲ,theoccurence rate of SNC incresed significarthy in the group Ⅰ and group Ⅱ(respectively 34.04% vs 70.00% and 72.22%,p【0.01),but the SNCZ andMDCT had no significant difference(p】0.05).Among 36 patients with SNC,20patienta(55.56%)had the induced atrial tachyarrhythmia.But among 39patients without SNC,8 patients(20.51%)had the induced atrialtachyarrhythmia.There was obvious difference in the two groups(p【0.005).Conclusion:There is well conrelation between the SNC and the atrialtachyarrhythmia.