Non-Invasive Programmed Stimulation (NIPS) to Guide the Subsequent VT Therapeutic Strategies
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Re-Do ventricular tachycardia ablation, Antiarrhythmic Drug Therapy (amiodarone, sotalol, or mexiletine).
- Who it may be relevant to
- Registry conditions: Ventricular Tachycardia (VT). Basic parameters: from 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Italy
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Official title
The Value of Late Non-Invasive Programmed Stimulation (NIPS) in the Setting of Ventricular Tachycardia (VT) Ablation to Guide the Subsequent VT Therapeutic Strategies: a Prospective Randomized Multicenter Study
Overview
The aim of this study is to define the importance of non-invasive programmed stimulation (NIPS) in risk stratification of ventricular tachycardia (VT) recurrence after catheter ablation and to determine the optimal treatment strategy. The primary objective is to establish whether a new VT ablation based on NIPS inducibility will reduce the risk of VT recurrence compared to antiarrhythmic drug therapy.
Detailed description
The value of non-invasive programmed ventricular stimulation (NIPS) in the setting of ablation of ventricular tachycardia (VT) in patients with structural heart disease has been the object of studies in the last decade.
The technique is based on the feature, uniformly available in the Implantable Cardioverter-Defibrillator (ICD), to perform a complete programmed stimulation study from the apex of the right ventricle to assess the inducibility of ventricular tachycardia, similar to what is routinely performed during an invasive electrophysiology procedure. Data from our group indicate that 26% of patients who were non-inducible (apparent success) at the end of the ablation session become re-inducible to ventricular tachycardia at "late" NIPS (day 6). This finding, possibly related to partial recovery of conduction within the treated area, had prognostic significance, as it was associated with a 6-fold increased risk of VT recurrence at follow-up.
Recently Muser et al. reported similar findings (45/216 -21% of patients had clinical VT induced) with "late" NIPS performed on day 3. However, within this group of patients, the VT recurrence rate was significantly lower in those who had undergone, based on this finding, a re-do VT ablation as compared to those treated conservatively (rec in 1/11 of the Re-do ablation group, 9% vs. 24/34 in the conservative treatment group, 71%, p\<0.01).
These data, however, originated from a retrospective observational analysis, where the indication of ablation was based on empirical physician preference.
No prospective randomized data compare the conservative attitude versus performing a new ablation in subjects who did not obtain a stable result after the first one. Therefore, this randomized multicenter clinical study aims to evaluate whether the repetition (Re-Do) of VT ablation process is superior to conservative medical therapy for reducing VT recurrences on post-procedural NIPS.
Interventions
- Procedure Re-Do ventricular tachycardia ablation
1\. Programmed ventricular stimulation (PVS); 2. Mapping during Sinus Rhythm (SR) or right ventricular pacing in pacing dependent patients; 3. Late Potentials identification; 4. VT(s) induction with diastolic pathway mapping when possible; 5. Catheter Ablation in SR or, at the operator's discretion, in VT if tolerated by the patient; 6. If VT is not inducible or the diastolic pathway is not mappable, a substrate ablation approach will be performed. 7. PVS is repeatedly attempting to reinduce VT - Drug Antiarrhythmic Drug Therapy (amiodarone, sotalol, or mexiletine)
The patients with a positive NIPS already on antiarrhythmic drugs (AAD) before the index procedure will re-start the original antiarrhythmic therapy. Patients who were not on AAD will start a new drug at the operator's discretion (amiodarone, sotalol, or mexiletine) according to clinical practice.
Primary outcome measures
- VT recurrence free survival rate [Time frame: 12 months after the procedure]
Secondary outcome measures (4)
- Number of ICD shocks [Time frame: Procedural, periprocedural, 6 and 12 months after procedure]
- Proportion of patients with VT storm [Time frame: Procedural, periprocedural, 6 and 12 months after procedure]
- Rate of subsequent hospitalization for VT recurrence/HF. [Time frame: Procedural, periprocedural, 6 and 12 months after procedure]
- Cardiac mortality [Time frame: Procedural, periprocedural, 6 and 12 months after procedure]
Eligibility criteria
Inclusion criteria
- Patients with an implanted ICD (all brands)
- Patients who underwent a successful (non-inducibility of any VT) Ventricular Tachycardia Ablation procedure, the "index procedure", supported by EnSite Precision or CARTO 3D mapping systems for the following etiologies: previous MI, myocarditis, ARVD, IDCM.
- Induction of monomorphic VT at NIPS 3-7days after a successful index procedure
- Age 18 years or more
- Able to provide an informed consent to participate to the study and available to respect the assessments described in the protocol.
Exclusion criteria
- Inducible VT after index procedure
- Contraindication to anticoagulants
- Presence of thrombi
- Presence of Mitral and Aortic prosthetic valve
- Recent (<3 months) myocardial infarction or unstable angina or Coronary Artery Bypass
- Pregnant or nursing
- Ventricular Tachycardia caused by reversible pathology
- < 1 Year life expectancy according to the investigator
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- Randomized
- Model
- Parallel assignment
- Masking
- Open label
- Primary purpose
- Prevention
Study locations
Italy · 1 center
- San Raffaele Hospital, Arrhythmology and Electrophysiology unit — Milan
Publications
- Della Bella P, Peretto G, Paglino G, Bisceglia C, Radinovic A, Sala S, Baratto F, Limite LR, Cireddu M, Marzi A, D'Angelo G, Vergara P, Gulletta S, Mazzone P, Frontera A. Bipolar radiofrequency ablation for ventricular tachycardias originating from the interventricular septum: Safety and efficacy in a pilot cohort study. Heart Rhythm. 2020 Dec;17(12):2111-2118. doi: 10.1016/j.hrthm.2020.06.025. Ep PMID 32599177
- Irie T, Yu R, Bradfield JS, Vaseghi M, Buch EF, Ajijola O, Macias C, Fujimura O, Mandapati R, Boyle NG, Shivkumar K, Tung R. Relationship between sinus rhythm late activation zones and critical sites for scar-related ventricular tachycardia: systematic analysis of isochronal late activation mapping. Circ Arrhythm Electrophysiol. 2015 Apr;8(2):390-9. doi: 10.1161/CIRCEP.114.002637. Epub 2015 Mar 4. PMID 25740836
- Muser D, Hayashi T, Castro SA, Supple GE, Schaller RD, Santangeli P, Arkles J, Kumareswaran R, Nazarian S, Deo R, Lin D, Dixit S, Epstein AE, Callans DJ, Marchlinski FE, Frankel DS. Noninvasive Programmed Ventricular Stimulation-Guided Management Following Ventricular Tachycardia Ablation. JACC Clin Electrophysiol. 2019 Jun;5(6):719-727. doi: 10.1016/j.jacep.2019.03.007. Epub 2019 May 1. PMID 31221360
- Oloriz T, Baratto F, Trevisi N, Barbaro M, Bisceglia C, D'Angelo G, Yamase M, Paglino G, Radinovic A, Della Bella P. Defining the Outcome of Ventricular Tachycardia Ablation: Timing and Value of Programmed Ventricular Stimulation. Circ Arrhythm Electrophysiol. 2018 Mar;11(3):e005602. doi: 10.1161/CIRCEP.117.005602. PMID 29545359
Identifiers
NCT: NCT06669299 · NIPS