scholarly journals Changes in electrophysiologic properties of the conductive system of the heart in children with atrioventricular nodal reentrant tachycardia after 2–8 years following radiofrequency catheter ablation of the slow pathway

Medicina ◽  
2009 ◽  
Vol 45 (8) ◽  
pp. 632 ◽  
Author(s):  
Rima Šileikienė ◽  
Dalia Bakšienė ◽  
Vytautas Šileikis ◽  
Tomas Kazakavičius ◽  
Jolanta Vaškelytė ◽  
...  
Keyword(s):  
Radiofrequency Ablation ◽  
Refractory Period ◽  
Atrioventricular Node ◽  
Atropine Sulfate ◽  
Effective Refractory Period ◽  
Slow Pathway ◽  
Atrioventricular Nodal Reentrant Tachycardia ◽  
Reentrant Tachycardia ◽  
Fast Pathway

Radiofrequency ablation of the slow pathway is an effective method of treatment in children with atrioventricular nodal reentrant tachycardia. The aim of our study was to evaluate anterograde conduction properties in children before and after radiofrequency ablation of the slow pathway and to determine the efficacy and safety of this method. Material and methods. Noninvasive transesophageal electrophysiological examination was performed in 30 patients at the follow-up period (mean duration, 3.24 years) after radiofrequency ablation of the slow pathway. Results. The slow pathway function was observed in 13 patients one day after ablation, in 26 patients during the follow-up period, and in 28 patients after administration of atropine sulfate. Atrioventricular node conduction was significantly decreased the following day after ablation and at the follow-up versus the preablation (165.2 [30.2] bmp and 146.3 [28.5] bpm versus 190.9 [31.4] bpm; P<0.001). The atrioventricular node effective refractory period prolonged significantly the following day after ablation and at the follow-up versus the preablation (319.3 [55.3] ms and 351.0 [82.1] ms versus 248.3 [36.6] ms; P<0.001). Effective refractory period of the fast pathway prolonged significantly as compared with the preablation (from 408.0 [60.4] ms to 481.2 [132.9] ms; P=0.005). The prolongation of effective refractory period of the slow pathway was more significant than effective refractory period of the fast pathway at the follow-up (P<0.001). Two late recurrences occurred; one patient had atrial tachycardia. Conclusion. Children with atrioventricular nodal reentrant tachycardia can be effectively and safety cured by ablative therapy. The end-point during slow pathway ablation should be the abolition of tachycardia with preservation of dual atrioventricular nodal physiology.

Long-term follow-up of fast pathway radiofrequency ablation in atrioventricular nodal reentrant tachycardia

2002 ◽  
Vol 89 (9) ◽  
pp. 1124-1125 ◽  
Author(s):  
Lars Lickfett ◽  
Dietrich Pfeiffer ◽  
Rainer Schimpf ◽  
Hugh Calkins ◽  
Berndt Lüderitz ◽  
...  
Keyword(s):  
Radiofrequency Ablation ◽  
Atrioventricular Nodal Reentrant Tachycardia ◽  
Reentrant Tachycardia ◽  
Long Term Follow Up ◽  
Fast Pathway

scholarly journals Electrophysiological changes in the conducting properties of fast pathway following modification of the slow pathway of the atrio ventricular node for atrio ventricular nodal re-entrant tachycardia

2019 ◽  
Vol 35 (5) ◽  
Author(s):  
Imran Khan ◽  
Bakhtawar Shah
Keyword(s):  
Refractory Period ◽  
Cardiac Electrophysiology ◽  
Effective Refractory Period ◽  
P Value ◽  
Slow Pathway ◽  
Base Line ◽  
Atrioventricular Nodal Reentrant Tachycardia ◽  
Creative Commons ◽  
The Difference ◽  
Fast Pathway

Objectives: To determine the possible changes in the conducting properties of the fast pathway after modification of the atrioventricular slow pathway for AVNRT which leads to the failure of the induction of tachycardia. Methods: This study was conducted in the Cardiac electrophysiology Laboratory of Hayatabad Medical Complex, Peshawar, Pakistan from March 2017 to March 2018. All the patients underwent radiofrequency modification of the slow pathway for AVNRT. Patients in whom typical AVNRT was inducible with demonstration of dual AV nodal physiology were included in the study. Results: A total of 171 cases were included in the study, 42 (25%) were males, mean age recorded was 47±15 years. There were no significant changes pre and post ablation in the base line parameters like VV interval, atrioventricular nodal (AV nodal) Wenckebach cycle length, slow pathway effective refractory period (SPERP) or fast and slow pathways maximal Atrio His interval. However significant change was observed in the effective refractory period of the fast pathway 350±49 Vs 290±32 (p value 0.0001). The difference between slow and Fast pathway ERP was also decreased significantly 82±36 Vs 56±24 (p value 0.004). Conclusion: Our study showed that ablation of AV nodal slow pathway for atrioventricular nodal reentrant tachycardia leads to changes in the effective refractory period of the fast pathway. doi: https://doi.org/10.12669/pjms.35.5.473 How to cite this:Khan I, Shah B. Electrophysiological changes in the conducting properties of fast pathway following modification of the slow pathway of the atrio ventricular node for atrio ventricular nodal re-entrant tachycardia. Pak J Med Sci. 2019;35(5):---------.  doi: https://doi.org/10.12669/pjms.35.5.473 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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