AzTrials
AzTrials

Atrial FibrillationNCT06096428

Hemolysis During Pulsed-field and Radiofrequency Ablation

An observational study of Atrial Fibrillation and Hemolysis, run by Charles University, Czech Republic at 1 site in Czechia.

Unknown status

Status not confirmed. The sponsor has not verified this record for over two years, so it may be out of date.

Official record
Search all trials

Trial summary

Hemolysis during and after catheter ablation will be compared between catheter ablation performed using radiofrequency and pulsed-field energy. Consecutive patients indicated for catheter ablation for AF will be enrolled, catheter ablation will be done using standard catheters (Qdot, Biosense Webster for RF, and… Read more about this study

Who is it for?
Ages 18 to 75 years
What is being tested?
Pulsed-field ablation and Radiofrequency ablation
Type of treatment
Medical device
How many people
60 participants
Where
1 siteCzechia
Study dates
15 Nov 2023to 30 Mar 2024
Phase
Observational
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 75 years
  • All sexes
  • Adult, Older adult

Study population: Patients with symptomatic paroxysmal or non-paroxysmal atrial fibrillation indicated according current guideliens for the cathter ablation of atrial fibrillation, i.e. pulmonary vein isolation

Who may be able to join

  • symptomatic atrial fibrillation indicated for catheter ablation
  • willingness to participate

Who cannot join

  • pregnancy
  • any known malignant or non-malignant hematological disorder
  • malignancy
  • age > 75 years
  • any disease associated with hemolysis
  • hemoglobin concentration less than 100 g/L
  • liver cirrhosis

Trial locations and contacts

1 site in 1 country.

Czechia1 site
  • Cardiocenter, 3rd Medical School, Charles University and University Hospital Kralovske Vinohrady

    Prague, 10034

Other trials in Czechia

About this study

Official title: The Assessment of Intravascular Peri-procedural Hemolysis During Catheter Ablation for Atrial Fibrillation Using Radiofrequency and Pulsed-field Energy

Hemolysis during and after catheter ablation will be compared between catheter ablation performed using radiofrequency and pulsed-field energy. Consecutive patients indicated for catheter ablation for AF will be enrolled, catheter ablation will be done using standard catheters (Qdot, Biosense Webster for RF, and Farapulse, Boston-Scientific for PF). Blood samples will be drawn at the beginning of ablation (T1), at the end of ablation (T2), and one day after the procedure (T3). Hemolysis will be analyzed using flow cytometry, ELISA and standard biochemistry and compared between RF and PF patients, Primary hypothesis is that hemolysis level will be higher after PF ablation compared to RF ablation.

Read the detailed description

Catheter ablation presents the most effective treatment for atrial fibrillation (AF). It consists of the electrical isolation of the pulmonary veins. Several kinds of ablation energies can be used for the ablation. So far, the most often kind of energy was radiofrequency (RF) energy that leads to thermal destruction of the cardiac tissue. Newly, pulsed-field (PF) energy was developed for catheter ablation of AF. The use of PF energy consists in ultra-short, high-power application of electrical impulses that lead to fast, non-thermal cardiac tissue destruction.

Despite significant advantages, such as tissue selectivity, short procedure duration, and high durability of ablated lesions, the use of PF energy could also have other adverse effects. Recently, renal failure due to accelerated peri-procedural hemolysis in patients with pre-existed renal disease was described after PF ablation for AF.

The aim of the project is to assess and compare the level of hemolysis during catheter ablation for AF using PF and RF energy. Sixty consecutive patients indicated for catheter ablation for AF according to the standard recommendation (symptomatic paroxysmal or non-paroxysmal AF) will be enrolled. Consecutive patients as they are scheduler for procedure will be enrolled without randomization. In 40 patients (20 paroxysmal and 20 non-paroxysmal), the ablation will be done using PF energy, and in 20 patients using RF energy.

In all patients, intracardiac echocardiography (Accunav, Siemens, Germany) and fluoroscopy will be used for navigation. The procedures will be done as it is currently routinely done in the EP lab. In RF patients, 4 vascular access will be used (one for 10-pole catheter placed into the coronary sinus, one for intracardiac echocardiography probe, and 2 for transseptal sheaths). Two transseptal punctures will be done under the guidance of intracardiac echocardiography using SL1 sheaths (Abbott, USA). One transseptal access will be used for diagnostic circular mapping catheter (Lasso, Biosense-Webster, USA), the other for the ablation catheter. The RF ablation will be performed using SmartTouch or QDot ablation catheters (both Biosense-Webster, USA); however, ablation will be driven by the ablation index even if QDot catheter is used. The RF ablation will be performed using ablation index (400-450 on anterior-superior aspects and 350-400 on posterior aspects of PVs), the QDot Plus (high-power short-duration) regimen won´t be used. The goal will be to achieve the entrance and exit block of all 4 PVs. In non-paroxysmal patients, additional ablations could be done at the discretion of the treating physician (fractionated singnals, lines).

In the PF patients, two vascular access will be obtained. The first will be used for intracardiac echocardiography, the second for the transseptal sheath. Transseptal puncture will be done also using SL1 sheath (Abbott, USA), and using over-the-wire technique, this sheath will be exchanged by the 16-F Faradrive sheath (BSCI, USA). The ablation then will be done using pentaspline ablation catheter (Farawave, Boston Scientific). Four application of pulsed-field energy in basket configuration, and 4 application in flower configuration will be applied to each pulmonary vein. Additional pulsed-field energy application could be added if the signal in PV are present. In non-paroxysmal patients, additional pulsed-field energy application could be applied on the discretion of the operator on the posterior wall, or mitral isthmus.

Blood samples will be taken at the beginning of the procedure from the femoral vein (T1), at the end of the procedure after ablation lesions completion (T2), and one day after the procedure (T3). Hemolysis will be assessed in all three samples 1) using flow cytometry (by means of measurement of "erythrocyte microparticles detected by the presence of antigens glycophorin A and Annexin V) and 2) using ELISA method (assessment of "cell free hemoglobin " concentration). Additionelly, standard biochemistry and blood count analysis will be done from the T1 and T3 samples (the concentration of lactate dehydrogenase, haptoglobin, indirect bilirubin, reticulocytes, and immature reticulocyte fraction).

Primary hypothesis is that the level of hemolysis will be higher after PF ablation compared to RF ablation. Since no studies were published on the hemolysis either during RF or PF ablation, no reliable power calculation can be done.

Being tested
Pulsed-field ablation, Radiofrequency ablation
Medical subject headings
Atrial Fibrillation, Hemolysis

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Pulsed-field ablationDevice

    Pulsed-field ablation will be done using pentaspline catheter (Farawave, Boston Scientific) and pulsed-field energy generator. The goal will be achieve of electrical isolation of pulmonary veins.

  • Radiofrequency ablationDevice

    Pulmonary vein isolation will be done using radiofrequency catheter (Qdot, Biosense-Webster) and generator of radiofrequency energy (nGEN, Biosense-Webster).

Study groups in NCT06096428
Study groupRoleWhat they receive
Pulsed-field groupPatients will undergo catheter ablation for atrial fibrillation using pulsed-field energy
Receives: Device: Pulsed-field ablation
Radiofrequency groupPatients will undergo catheter ablation using radiofrequency energx
Receives: Device: Radiofrequency ablation

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Erythrocyte (red blood cells, RBC) microparticles

    The concentration of erythrocyte microparticles /µL. Analysis using flow cytometry, as the concentration of total erythrocyte mictoparticles in platelet-rich plasma.

    Measured: One day after the procedure

  2. Cell free hemoglobin

    The concentration of cell-free hemoglobin, using ELISA measurement, in g/L

    Measured: One day after the procedure

Secondary outcomes (5)
  1. Lactate-dehydrogenase

    The concentration of lactate-dehydrogenase (µkat/L)

    Measured: One day after the procedure

  2. Haptoglobin

    The concentration of haptoglobin (g/L)

    Measured: One day after the procedure

  3. Indirect bilirubin

    The concentration of indirect bilirubin (µmol/L)

    Measured: One day after the procedure

  4. Reticulocytes

    The absolute concentration of reticulocytes

    Measured: One day after the procedure

  5. Immature reticulocyte fraction (IRF)

    The percentage of immature reticulocytes of all reticulocytes (%)

    Measured: One day after the procedure

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted23 Oct 2023
  2. Study start15 Nov 2023 (estimated)
  3. Primary completion30 Mar 2024 (estimated)
  4. Study completion30 Mar 2024 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Case-control
Time perspective
Prospective
Enrolment
60 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06096428
Sponsor's protocol ID
PFA HEMOLYSIS
Status last verified
Sep 2023
First submitted
20 Sep 2023
Last updated
15 Nov 2023
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: Data will be shared based on individual request

Publications

  • Zoni-Berisso M, Filippi A, Landolina M, Brignoli O, D'Ambrosio G, Maglia G, Grimaldi M, Ermini G. Frequency, patient characteristics, treatment strategies, and resource usage of atrial fibrillation (from the Italian Survey of Atrial Fibrillation Management [ISAF] study). Am J Cardiol. 2013 Mar 1;111(5):705-11. doi: 10.1016/j.amjcard.2012.11.026. Epub 2012 Dec 28.

    PubMed 23273528
  • Reddy VY, Dukkipati SR, Neuzil P, Anic A, Petru J, Funasako M, Cochet H, Minami K, Breskovic T, Sikiric I, Sediva L, Chovanec M, Koruth J, Jais P. Pulsed Field Ablation of Paroxysmal Atrial Fibrillation: 1-Year Outcomes of IMPULSE, PEFCAT, and PEFCAT II. JACC Clin Electrophysiol. 2021 May;7(5):614-627. doi: 10.1016/j.jacep.2021.02.014. Epub 2021 Apr 28.

    PubMed 33933412
  • Ekanem E, Reddy VY, Schmidt B, Reichlin T, Neven K, Metzner A, Hansen J, Blaauw Y, Maury P, Arentz T, Sommer P, Anic A, Anselme F, Boveda S, Deneke T, Willems S, van der Voort P, Tilz R, Funasako M, Scherr D, Wakili R, Steven D, Kautzner J, Vijgen J, Jais P, Petru J, Chun J, Roten L, Futing A, Rillig A, Mulder BA, Johannessen A, Rollin A, Lehrmann H, Sohns C, Jurisic Z, Savoure A, Combes S, Nentwich K, Gunawardene M, Ouss A, Kirstein B, Manninger M, Bohnen JE, Sultan A, Peichl P, Koopman P, Derval N, Turagam MK, Neuzil P; MANIFEST-PF Cooperative. Multi-national survey on the methods, efficacy, and safety on the post-approval clinical use of pulsed field ablation (MANIFEST-PF). Europace. 2022 Sep 1;24(8):1256-1266. doi: 10.1093/europace/euac050.

    PubMed 35647644
  • Liu D, Li Y, Zhao Q. Effects of Inflammatory Cell Death Caused by Catheter Ablation on Atrial Fibrillation. J Inflamm Res. 2023 Aug 17;16:3491-3508. doi: 10.2147/JIR.S422002. eCollection 2023.

    PubMed 37608882
  • Osmancik P, Bacova B, Herman D, Hozman M, Fiserova I, Hassouna S, Melenovsky V, Karch J, Vesela J, Benesova K, Reddy VY. Periprocedural Intravascular Hemolysis During Atrial Fibrillation Ablation: A Comparison of Pulsed Field With Radiofrequency Ablation. JACC Clin Electrophysiol. 2024 Jul;10(7 Pt 2):1660-1671. doi: 10.1016/j.jacep.2024.05.001. Epub 2024 May 16.

    PubMed 38852101

Questions about this trial

What is this clinical trial studying?

An observational study of Atrial Fibrillation and Hemolysis, run by Charles University, Czech Republic at 1 site in Czechia.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: status not confirmed, as of the sponsor's last update on 15 Nov 2023. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Czechia. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Results are not available in the source record.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Erythrocyte (red blood cells, RBC) microparticles (time frame: One day after the procedure). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06096428, which also lists 5 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 15 Nov 2023.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in