ClinicalTrials.gg
Status unknownNCT03460535RhytmiaPVCUpdated Mar 9, 2018

The Rhytmia System to Determine the Precise Location and Potential Mechanism of Premature Contractions

An observational study in Cardiac Arrhythmia and Cardiomyopathy, Dilated, sponsored by University Hospital, Toulouse. Status unknown at 1 site in France. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2018-03-09.

Sponsored by University Hospital, Toulouse · Observational

The sponsor has not verified this record recently (last verified Mar 2018), so the status shown — last known as Recruiting — may be out of date.
Study type
Observational
Model
Case-only
Time perspective
Prospective
Enrollment
20
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 85 studies in Arrhythmias, Cardiac with a site in France — 18 open to participants now, 23 under way, none of them phase 3. Arrhythmias, Cardiac · France.

Planned enrollment
41st of 43
20 · median 394
Started
2017
with 4 others
Observational
43 of 85
14 open now
Registered
39th of 85
by date

Among the 85 studies in Arrhythmias, Cardiac with a site in France, this one is the 41st largest by planned enrollment of the 43 observational ones that give a count, is one of 5 that started in 2017, is one of 43 observational ones, and was the 39th registered.

Arrhythmias, Cardiac

1,051 studies on the registry are indexed under Arrhythmias, Cardiac; 236 are open to participants now.

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Open to participants now

18 of the 85 studies in Arrhythmias, Cardiac with a site in France are open now. Recruiting first, the newest first:

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A study can be open while its sites in France have not opened yet or have stopped. Only those recruiting at a site in France →

Who these studies take

Of the 167 Arrhythmias, Cardiac studies recruiting now, 118 (71%) set no upper age limit and 13 (8%) stop at 75 or younger; 31 take children under 18; 26 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

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02

Study summary

This is a purely observational project and the objectives are to record and analyze the local potentials at the site of Premature Ventricular Contraction (VPC) focus through the Rhythmia system, ti determine the short and long-term success of the procedure and compare it to the existing literature about standard procedures, to highlight the advantages of the system compared to conventional mapping and to characterize optimal pace map or activation map as achieved by the Rhythmia system.

Read the detailed description

This is a purely observational study. No special methodology choice, no comparison.

The study want to find the determination of precise location of the focus and mechanisms involved constitutes a challenge for conventional electrophysiology, even with tridimensional systems, because of the time needed for accurate delineation of the location (due to the sometimes unfrequent Ventricular Premature Beats (VPB)) and to the insufficient mapping density or inadequate signal characteristics. The Rhythmia system could allow better determination of the focus location in relation to the anatomical structures, especially with unfrequent VPB, because of the available high density mapping due to the number of closed high-resolution electrodes located on the Orion catheter. Better delineation of the true focus origin and of the mechanisms involved (automaticity vs re-entry) may be of useful help for better understanding and efficient therapy.

03

Conditions studied

  • Cardiac Arrhythmia
  • Cardiomyopathy, Dilated

Keywords

  • Rythmia system
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Patients will be recruited by consultations, hospitalisations or referral by external doctors, in the department of Cardiology.

This is a purely observational study. No power calculation will be needed due to the lack of comparisons.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • patients with symptomatic monomorphic PVC with or without heart disease to anti arrhythmic drugs
  • patients with dilated cardiomyopathy and altered (LVEF) suspected to be causes by frequent monomorphic VPC
  • patients with malignant ventricular arrhythmias reproducibly induced by monomorphic PVC

Exclusion criteria

Exclusion Criteria:

  • patients with non-symptomatic VPC and without cardiomyopathy
  • patients under 18 yo
  • pregnant women
  • patients with polymorphic PVC arising from clearly different areas
  • patient protected by the french law: guardianship and Trusteeship
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Relapsed and refractory

Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.

LVEF (left ventricular ejection fraction)

The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.

05

Study design

Observational model
Case-only
Time perspective
Prospective
Enrollment
20 participants (estimated)
Patient registry
No
06

What researchers measure

Primary outcomes

  1. Determining the surface of optimal pace map or activation map

    To evaluate the area of isochronal earliest activation of PVC (Premature Ventricular Contraction), based on unipolar or bipolar activation : correlations will be made with the suspected endocardial or epicardial/intra-mural location of the focus. This technic may reduce the area of perfect pace-mapping and possibly more accurately locate the focus.

    Time frame: One year

Secondary outcomes

  1. Record the local potentials at the site of PVC focus through the Rhythmia system

    Pacing from any electrode being in close contact with the endocardial surface and comparing the paced QRS to the spontaneous VPC (automatic calculation available on Bard ElectroPhysiology (EP) system). Describe and analyze the local signals recorded from the Orion catheter at the site of the PVC focus. by looking for prepotentials as a surrogate of local abnormal automaticity, for local discrete scar and local late potentials favouring local reentry as a cause for PVC, determining the local activation characteristics of VPC (surface of local breakthrough, velocity and direction of activation.

    Time frame: One year

  2. Determine the short success of the procedure

    Determine by repeated Holter recordings, and the relation to the findings made during the procedure (endocardial or suspected epicardial focus), mechanism

    Time frame: One year

  3. Determine long-term success of the procedure and compare it to the existing

    Determine by repeated Holter recordings, and the relation to the findings made during the procedure (endocardial or suspected epicardial focus), mechanism

    Time frame: One year

  4. Characterize optimal pace map or activation map as achieved by the Rhythmia system

    Evaluate the surface of perfect pace-mapping using the Orion catheter, by pacing from any electrode being in close contact with the endocardial surface and comparing the paced QRS to a template of the spontaneous VPC

    Time frame: One year

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Jun 2017 (actual). Primary completion is estimated for Jun 2019, 24 months after the start.

Of 189 non-industry observational studies under Arrhythmias, Cardiac, half reached primary completion within 45 months of starting (the median), counting those still running; a quarter within 22 and three quarters within 140. This study's planned 24 months is below that.

Counting every sponsor, half of 258 studies reached it within 38 months; a quarter within 16 and three quarters within 97.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 26, 2018
First posted
Mar 9, 2018
StartActual
Jun 14, 2017
Primary completionEst.
Jun 2019
CompletionEst.
Jun 2019
Last update
Mar 9, 2018
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 9, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03460535
Collaborators
Boston Scientific Group
Responsible party
Sponsor
First posted
Mar 9, 2018
Start date
Jun 14, 2017
Primary completion
Jun 2019 (estimated)
Completion
Jun 2019 (estimated)
Last update
Mar 9, 2018

Study contacts

Philippe Maury, MD
Contact
maury.p@chu-toulouse.fr
5 61 32 30 54 ext. 33
Isabelle Olivier, PhD
Contact
olivier.i@chu-toulouse.fr
5 61 77 70 51 ext. 33
Philippe Maury, MD
principal investigator · University Hospital, Toulouse

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Mar 2018. You cannot join it, but the record below documents what was studied.

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