Intracardiac Echocardiography Guided Slow Pathway Cryoablation
Study Details
Study Description
Brief Summary
Atrioventricular nodal reentry tachycardia is best treated with catheter ablation aimed at disruption of conduction of the slow pathway. There are currently two possible options for this ablation: radiofrequency ablation and cryoablation. The first seems to result in superior success rate, however carries a small risk of collateral damage of the heart conduction system, specifically the atrioventricular (AV) node. Cryoablation seems less effective, but safer as AV nodal damage can be avoided. The aim of this study is to prospectively test possible improved efficcacy of cryoablation of the slow pathway with the use intraprocedural intracardiac echocardiography.
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Detailed Description
We will prospectively enroll all patients that will be referred to our center for ablation of supraventricular tachycardia and will have an electrophysiologically proven atrioventricular nodal reentry tachycardia. In order to prove the mechanism specific maneuvers will be performed during induced sustained tachycardia. Navigation in the heart will be performed in a fluoroless fashion, with the use of a three-dimensional electro-anatomic mapping (3DEAM) system. Detailed anatomical definition and navigation in the area of the Koch triangle will be done with intracardiac echocardiography (ICE). Also, in sinus rhythm, when present, the Jackman potential will be tagged on the 3DEAM map. Cryomapping will be performed at the presumed location of the slow pathway (position of the Jackman potential or only anatomical location as defined with ICE) during ongoing tachycardia with the aim to terminate it and continue with cryoablation at the successful site.
Noninducibility will be tested with programmed and fast atrial stimulation. Patients will be followed clinically for up to 12 months.
Study Design
Outcome Measures
Primary Outcome Measures
- Noninducibility at the end of procedure [up to 1 day]
Noninducibility of AVNRT after cryoablation with programmed and fast atrial stimulation
- Arrhythmia free survival [12 months]
Absence of AVNRT episodes during follow-up
Eligibility Criteria
Criteria
Inclusion Criteria:
- ECG or holter ECG evidence of regular narrow QRS complex tachycardia, intraprocedural pacing maneuvers in sinus rhythm and during ongoing tachycardia indicating presence of AVNRT
Exclusion Criteria:
- terminal or severe medical condition with expected survival of less then 12 months, deep venous thrombosis preventing access to the femoral vein, intracardiac thrombi, anatomical irregularities of pelvic veins and/or inferior vena cava, inability to induce AVNRT after the initial induction and diagnosis - enables exclusion of procedures where accidental mechanical termination of slow pathway conduction with the cryoablation catheter occurs
Contacts and Locations
Locations
No locations specified.Sponsors and Collaborators
- University Medical Centre Ljubljana
Investigators
- Study Chair: Matevž Jan, MD, University Medical Centre Ljubljana
Study Documents (Full-Text)
None provided.More Information
Publications
- Brugada J, Katritsis DG, Arbelo E, Arribas F, Bax JJ, Blomstrom-Lundqvist C, Calkins H, Corrado D, Deftereos SG, Diller GP, Gomez-Doblas JJ, Gorenek B, Grace A, Ho SY, Kaski JC, Kuck KH, Lambiase PD, Sacher F, Sarquella-Brugada G, Suwalski P, Zaza A; ESC Scientific Document Group. 2019 ESC Guidelines for the management of patients with supraventricular tachycardiaThe Task Force for the management of patients with supraventricular tachycardia of the European Society of Cardiology (ESC). Eur Heart J. 2020 Feb 1;41(5):655-720. doi: 10.1093/eurheartj/ehz467. No abstract available. Erratum In: Eur Heart J. 2020 Nov 21;41(44):4258.
- Drago F, Calvieri C, Russo MS, Remoli R, Pazzano V, Battipaglia I, Gimigliano F, Allegretti G, Silvetti MS. Low-voltage bridge strategy to guide cryoablation of typical and atypical atrioventricular nodal re-entry tachycardia in children: mid-term outcomes in a large cohort of patients. Europace. 2021 Feb 5;23(2):271-277. doi: 10.1093/europace/euaa195.
- Pandozi C, Lavalle C, Bongiorni MG, Catalano A, Pelargonio G, Russo M, Piro A, Carbone A, Narducci ML, Galeazzi M, Ficili S, Piccolo F, Maddaluno F, Malacrida M, Colivicchi F, Segreti L. High-density mapping of Koch's triangle during sinus rhythm and typical AV nodal reentrant tachycardia: new insight. J Interv Card Electrophysiol. 2021 Sep;61(3):487-497. doi: 10.1007/s10840-020-00841-8. Epub 2020 Aug 6.
- ICE cryo AVNRT