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Predictors of zero X ray procedures in supraventricular arrhythmias ablation.

Session Poster session 1

Speaker Andrea Di Cori

Event : EHRA 2019

  • Topic : arrhythmias and device therapy
  • Sub-topic : Treatment
  • Session type : Poster Session

Authors : A Di Cori (Pisa,IT), G Zucchelli (Pisa,IT), A Vecchi (Pisa,IT), V Barletta (Pisa,IT), L Segreti (Pisa,IT), S Viani (Pisa,IT), L Paperini (Pisa,IT), V Della Tommasina (Pisa,IT), T Cellamaro (Pisa,IT), M Carluccio (Pisa,IT), D Andreini (Pisa,IT), E Soldati (Pisa,IT), MG Bongiorni (Pisa,IT)

A Di Cori1 , G Zucchelli2 , A Vecchi2 , V Barletta2 , L Segreti2 , S Viani2 , L Paperini2 , V Della Tommasina2 , T Cellamaro2 , M Carluccio2 , D Andreini2 , E Soldati2 , MG Bongiorni2 , 1Santa Chiara Hospital, Department of Cardiovascular Diseases - Pisa - Italy , 2Azienda Ospedaliero-Universitaria Pisana, Cardiac-Thoracic and Vascular Department - Pisa - Italy ,

Supraventricular Tachycardia (non-AF) - Treatment

Background: Nonfluoroscopic mapping systems have demonstrated significant reduction of radiation exposure in radiofrequency (RF) catheter ablation procedures. However, predictors of zero-x ray procedures are unknown.

Purpose: To evaluate predictors of a completely non-fluoroscopic approach for supraventricular arrhythmias using the Ensite-PrecisionTM electroanatomical navigation system.

Methods: During 3 years, all consecutive patients referred for RF catheter ablation of regular supraventricular tachycardia (SVT) were admitted for a minimally fluoroscopic approach (MFA). Patients underwent a MFA procedure with an electro-anatomical navigation system or a conventional fluoroscopic approach (ConvA) procedure. The only exclusion criterion was the need to perform a transseptal puncture.

Results:  A total of 187 patients (98 men, age 53±19 years) underwent an EP study, 88 (47%) with an MFA approach and 99 (53%) with a ConvA. Fifty-five had no inducible arrhytmias. Fifty-six had AV nodal reentrant tachycardia (AVNRT), 49 patients had typical atrial flutter (AFL), 28 had AV reciprocating tachycardia (AVRT), 1 had focal atrial tachycardia (AT), and all underwent a RF ablation. The MFA was associated with a significant reduction in total fluoroscopy time (5.5±10 vs 13±18 min, P=0.01) and operator radiation dose (0.8±2.5 vs 3±8.2 mSV, P<0.05). In the MFA group, X-ray was not used at all in 51/88 (58%) procedures (zero X ray). The greatest absolute dose reduction was observed in AVNRT (0.1± 0.3 vs 5.1± 10 mSV, P=0.01, 98% relative dose reduction) and in AFL (1.3±3.6 vs 11±16 mSV, p=0.003, 88% relative dose reduction) groups. Both AVNRT or AFL resulted the only statistically significant predictors of zero x ray at multivariate analysis (OR 4.5, 95%CI 1.5–13 and OR 5, 95%CI 1.7-15, P<0.001, respectively). Success and complication rate was comparable between groups (P=NS).

Conclusions: Efficacy and safety of MFA is comparable to ConV approach for SVT ablation. Radiological exposure is significantly reduced. Type of arrhythmia is the strongest predictor of zero x ray procedure.

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