Korean Circ J.  1988 Dec;18(4):581-596. 10.4070/kcj.1988.18.4.581.

Electrophysiological Properties of the AV Node and the Accessory Pathway in Patients with the AV Reentrant Tachycardia

• Kim JJ
• Kim DW
• Kim CH
• Park SW
• Ryu KH
• Oh BH
• Park YB
• Choi YS
• Seo JD
• Lee YW

• KMID: 2093247
• DOI: http://doi.org/10.4070/kcj.1988.18.4.581

Abstract

The properties of the normal and anomalous pathways were evaluated in 25 patients with accessory pathway to determine the factors influencing the development of orthodromic AV reentrant tachycardia, Nineteen patients had inducible PSVT and six patients had not. The results were as follows ; 1) Age, sex, and accessory pathway location of group A and group B were not different significanlty. 2) The presence of paroxysmal palpitation and the documentation of PSVT on surface ECG between group A and group B were signifcantly different. 3) The atrial effective refractory period(AERP), ventricular ERP, and antegrade ERP of accessory pathway of group A and group B were not different significantly. 4) Block cucle length and ERP of antegrade AV node(BCLa and ERPa) in groupA were shorter than those of antegrade accessory pathway. 5) There was no retrograde conduction through AV node in group A after block in retrograde accessory pathway. 6) Faliure to induce PSVT was accounted for by one of the following ; a) absence of antegrade conduction through AV node after a block of antegrade accessory pathway(4 patients) b) inadequate retrograde accessory pathway properties(3 patients) c) both inadequate antegrade AV nodal and retrograde accessory pathway(1 patient). Therefore, the occurrence of PSVT in patients with accessory pathway depends on the shorter BDLa and ERPa of AV node than those of accessory pathway and BCLr(299+/-51msec)and ERPr(310+/-41msec) of accessory pathway, but it dose not depend on the BCLa and ERPa of accessory pathway.

MeSH Terms

Atrioventricular Node*
Electrocardiography
Humans
Tachycardia*