ClinicalTrials.gg
Status unknownNCT04271033PARADIGM-EXTUpdated Mar 29, 2022

MicroNet-covered Stent System for Stroke Prevention in All Comer Carotid Revascularization

An interventional study of Carotid Artery Stenting in Carotid Artery Diseases, sponsored by John Paul II Hospital, Krakow. Status unknown at 1 site in Poland. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2022-03-29.

Sponsored by John Paul II Hospital, Krakow · Not applicable, Interventional, and Treatment

The sponsor has not verified this record recently (last verified Mar 2022), so the status shown — last known as Recruiting — may be out of date.

From the registry’s dates

  • Registered 4 years 4 months after the study started (first participant enrolled Sep 2015, registered Jan 2020).
Phase
Not applicable
Study type
Interventional
Enrollment
550
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

All-comer study of unselected patients suitable for carotid artery revascularization to evaluate the feasibility, efficacy and safety of first line endovascular revasculariztion using MicroNet covered stent (CGuard™) in the treatment of consecutive symptomatic and increased-stroke-risk asymptomatic carotid lesions that require revascularization by Neurovascular Team decision.

Read the detailed description

Independent investigator initiated, academic, single arm, open-label, non-randomized, prospective, multicenter, multispecialty trial of CGuard™ routine use in all-comer population of consecutive patients with symptomatic or increased-stroke-risk asymptomatic carotid stenosis.

Increased-stroke-risk is defined as the following patient and/or lesion characteristics:

thrombus containing, documented progressive, irregular, ulcerated lesion; evidence of ipsilateral ischemic cerebral injury in MRI or CT imaging; contralateral stroke in relation to carotid stenosis; contralateral artery occlusion.

The main objective of this observational study is to evaluate (1) the periprocedural feasibility and efficacy of CGuard™ stent system in the treatment of carotid artery stenosis (2) long-term efficacy and safety of routine CGuard™ stent system use.

The study hypothesis is that the novel CGuard™ MicroNet® covered stent is safe and effective for a majority of consecutive patients considered to require carotid revascularization.

The multicenter arm of the project has a specific cohort descriptor: PARADIGM-EXTEND MC

02

Conditions studied

  • Carotid Artery Diseases

Keywords

  • Stenting
03

In context

Carotid Artery Diseases

257 studies on the registry are indexed under Carotid Artery Diseases; 58 are open to participants now.

This study's planned enrollment of 550 is above the median of 120 across 123 interventional studies indexed under Carotid Artery Diseases.

Browse Carotid Artery Diseases studies →

Lead sponsor

John Paul II Hospital, Krakow is the lead sponsor of 16 studies on the registry; 6 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

General Inclusion Criteria:

  • Patient > 18 years old qualified by NeuroVascular Team for carotid revascularization according to local standards of care
  • Signed informed consent
  • Agreement (routin un this group of patients) to clinical and ultrasonographis follow up.

Angiographic Inclusion Criteria:

  • De-novo atherosclerotic lesions or neo-atherosclerosis
  • Symptomatic patients (history of transient ischemic attack, ischaemic stroke or amaurosis fugax within 6 months from index procedure) with index artery stenosis ≥50% assessed in angiography with NASCET method or
  • Asymptomatic patients with index artery stenosis ≥70-80% assessed in angiography with NASCET method

General Exclusion Criteria:

  • Lack of NeuroVascular Team agreement on carotid revascularization indication
  • Lack of signed informed consent
  • Estimated life expectancy less than 1 year
  • Chronic renal failure with serum creatinine level > 3.0 mg/dL
  • Myocardial Infarction within 72 hours prior to index procedure.
  • Pregnant women
  • Diagnosed coagulopathies
  • History of contrast media allergy, not reacting to pharmacotherapy

Angiographic Exclusion Criteria:

  • Index lesion occlusion
  • Common carotid artery stent protruding to aortic arch
  • Anatomical conditions restricting stent implantation
  • Significant common carotid artery stenosis proximal to index lesion (unless treated)
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
550 participants (estimated)

Study arms

  • Experimental
    Carotid Artery Stenting

    Consecutive male and female patients older than 18 year with symptomatic and increased-stroke-risk asymptomatic carotid lesions that require revascularization by Neurovascular Team decision.

    Device: Carotid Artery Stenting

Interventions

  • DeviceCarotid Artery Stenting

    Carotid artery stenting according to local clinical experience and ESC/ESVS guidelines using exclusively CGuard™, MicroNet covered stent under proximal or distal intraprocedural cerebral protection according to "tailored CAS" algorithm.

06

What researchers measure

Primary outcomes

  1. MACNE (Major Adverse Cardiac and Neurological Events)

    Death, Stroke, Myocardial Infarction.

    Time frame: 12 months

Secondary outcomes

  1. Procedural success

    Successful stent delivery and deployment without complication

    Time frame: Within 48 hours from index procedure

  2. In-hospital MACNE (Major Adverse Cardiac and Neurological Events)

    Death, Stroke, Myocardial Infarction within index hospitalization

    Time frame: Within 48 hours from index procedure

  3. 30-day MACNE (Major Adverse Cardiac and Neurological Events)

    Death, Stroke, Myocardial Infarction within 30 days

    Time frame: 30 days

  4. Incidence of any periprocedural complications

    Any periprocedural complications

    Time frame: Within 48 hours

  5. Functional MRI efficacy assessment.

    In case of fMRI evaluation, pre and postprocedural imaging.

    Time frame: Within 48 hours

  6. Diffusion Weighted MRI efficacy assessment.

    In case of DW-MRI evaluation, new ischemic lesions according to protocol criteria in postprocedural imaging.

    Time frame: Within 48 hours

  7. Intravascular Ultrasound Stent Evaluation

    In case of IVUS examination, postprocedural stent expansion, apposition and carotid plaque sequestration evaluation.

    Time frame: Periprocedural

  8. Ipsilateral Stroke incidence

    Ischemic stoke at the site of index procedure.

    Time frame: From one month until one year after the procedure.

  9. Ipsilateral Stroke incidence

    Ischemic stoke at the site of index procedure.

    Time frame: From one year until five years after the procedure.

  10. Any stroke incidence

    Any stroke during study observational period.

    Time frame: Within five years from the procedure.

  11. Peak Systolic Velocity in Duplex Ultrasound evaluation in target vessel

    Peak-systolic and End-diastolic Velocities assessed with DUS peri-proceduraly.

    Time frame: Periprocedural

  12. Peak Systolic Velocity in Duplex Ultrasound evaluation in target vessel

    Peak-systolic and End-diastolic Velocities assessed with DUS 30 day after discharge.

    Time frame: Within 30 days after index procedure.

  13. Peak Systolic Velocity in Duplex Ultrasound evaluation in target vessel

    Peak-systolic and End-diastolic Velocities assessed with DUS one year after discharge.

    Time frame: One year after index procedure.

07

Study locations

1 of 1 sites recruiting
  • Department of Cardiac and Vascular Diseases, The John Paul II Hospital
    Krakow, Maloplska 31-202, Poland
    Recruiting
08

References and documents

Publications

  • Aboyans V, Ricco JB, Bartelink MEL, Bjorck M, Brodmann M, Cohnert T, Collet JP, Czerny M, De Carlo M, Debusa S, Espinola-Klein C, Kahan T, Kownator S, Mazzolai L, Naylora AR, Roffi M, Rotherb J, Sprynger M, Tendera M, Tepe G, Venermoa M, Vlachopoulos C, Desormais I. 2017 ESC Guidelines on the Diagnosis and Treatment of Peripheral Arterial Diseases, in collaboration with the European Society for Vascular Surgery (ESVS). Rev Esp Cardiol (Engl Ed). 2018 Feb;71(2):111. doi: 10.1016/j.rec.2017.12.014. No abstract available. English, Spanish. PubMed 29425606 ↗
  • Brott TG, Howard G, Roubin GS, Meschia JF, Mackey A, Brooks W, Moore WS, Hill MD, Mantese VA, Clark WM, Timaran CH, Heck D, Leimgruber PP, Sheffet AJ, Howard VJ, Chaturvedi S, Lal BK, Voeks JH, Hobson RW 2nd; CREST Investigators. Long-Term Results of Stenting versus Endarterectomy for Carotid-Artery Stenosis. N Engl J Med. 2016 Mar 17;374(11):1021-31. doi: 10.1056/NEJMoa1505215. Epub 2016 Feb 18. PubMed 26890472 ↗
  • Rosenfield K, Matsumura JS, Chaturvedi S, Riles T, Ansel GM, Metzger DC, Wechsler L, Jaff MR, Gray W; ACT I Investigators. Randomized Trial of Stent versus Surgery for Asymptomatic Carotid Stenosis. N Engl J Med. 2016 Mar 17;374(11):1011-20. doi: 10.1056/NEJMoa1515706. Epub 2016 Feb 17. PubMed 26886419 ↗
  • Sardar P, Chatterjee S, Aronow HD, Kundu A, Ramchand P, Mukherjee D, Nairooz R, Gray WA, White CJ, Jaff MR, Rosenfield K, Giri J. Carotid Artery Stenting Versus Endarterectomy for Stroke Prevention: A Meta-Analysis of Clinical Trials. J Am Coll Cardiol. 2017 May 9;69(18):2266-2275. doi: 10.1016/j.jacc.2017.02.053. PubMed 28473130 ↗
  • Janczak D, Malinowski M, Ziomek A, Kobecki J, Lesniak M, Dorobisz T, Dorobisz K, Janczak D, Chabowski M. Carotid artery stenting versus endarterectomy for the treatment of both symptomatic and asymptomatic patients with carotid artery stenosis: 2 years' experience in a high-volume center. Adv Clin Exp Med. 2018 Dec;27(12):1691-1695. doi: 10.17219/acem/75902. PubMed 30063301 ↗
  • de Donato G, Setacci F, Sirignano P, Galzerano G, Cappelli A, Setacci C. Optical coherence tomography after carotid stenting: rate of stent malapposition, plaque prolapse and fibrous cap rupture according to stent design. Eur J Vasc Endovasc Surg. 2013 Jun;45(6):579-87. doi: 10.1016/j.ejvs.2013.03.005. Epub 2013 Apr 10. PubMed 23582886 ↗
  • Kotsugi M, Takayama K, Myouchin K, Wada T, Nakagawa I, Nakagawa H, Taoka T, Kurokawa S, Nakase H, Kichikawa K. Carotid Artery Stenting: Investigation of Plaque Protrusion Incidence and Prognosis. JACC Cardiovasc Interv. 2017 Apr 24;10(8):824-831. doi: 10.1016/j.jcin.2017.01.029. PubMed 28427600 ↗
  • Schofer J, Musialek P, Bijuklic K, Kolvenbach R, Trystula M, Siudak Z, Sievert H. A Prospective, Multicenter Study of a Novel Mesh-Covered Carotid Stent: The CGuard CARENET Trial (Carotid Embolic Protection Using MicroNet). JACC Cardiovasc Interv. 2015 Aug 17;8(9):1229-1234. doi: 10.1016/j.jcin.2015.04.016. PubMed 26292586 ↗
  • Pieniazek P, Musialek P, Kablak-Ziembicka A, Tekieli L, Motyl R, Przewlocki T, Moczulski Z, Pasowicz M, Sokolowski A, Lesniak-Sobelga A, Zmudka K, Tracz W. Carotid artery stenting with patient- and lesion-tailored selection of the neuroprotection system and stent type: early and 5-year results from a prospective academic registry of 535 consecutive procedures (TARGET-CAS). J Endovasc Ther. 2008 Jun;15(3):249-62. doi: 10.1583/07-2264.1. PubMed 18540694 ↗
  • Musialek P, Grunwald IQ. How asymptomatic is "asymptomatic" carotid stenosis? Resolving fundamental confusion(s) - and confusions yet to be resolved. Pol Arch Intern Med. 2017 Nov 30;127(11):718-719. doi: 10.20452/pamw.4157. Epub 2017 Nov 30. No abstract available. PubMed 29192895 ↗
  • Musialek P, Hopf-Jensen S. Commentary: Carotid Artery Revascularization for Stroke Prevention: A New Era. J Endovasc Ther. 2017 Feb;24(1):138-148. doi: 10.1177/1526602816671263. Epub 2016 Oct 13. No abstract available. PubMed 27733691 ↗
  • Musialek P, Hopkins LN, Siddiqui AH. One swallow does not a summer make but many swallows do: accumulating clinical evidence for nearly-eliminated peri-procedural and 30-day complications with mesh-covered stents transforms the carotid revascularisation field. Postepy Kardiol Interwencyjnej. 2017;13(2):95-106. doi: 10.5114/pwki.2017.69012. Epub 2017 Jul 19. PubMed 28798779 ↗
  • Stabile E, de Donato G, Musialek P, De Loose K, Nerla R, Sirignano P, Chianese S, Mazurek A, Tesorio T, Bosiers M, Setacci C, Speziale F, Micari A, Esposito G. Use of Dual-Layered Stents in Endovascular Treatment of Extracranial Stenosis of the Internal Carotid Artery: Results of a Patient-Based Meta-Analysis of 4 Clinical Studies. JACC Cardiovasc Interv. 2018 Dec 10;11(23):2405-2411. doi: 10.1016/j.jcin.2018.06.047. PubMed 30522670 ↗
  • Musialek P. TASTE-less endpoint of 30-day mortality (and some other issues with TASTE) in evaluating the effectiveness of thrombus aspiration in STEMI: not the "evidence" to change the current practice of routine consideration of manual thrombus extraction. Kardiol Pol. 2014;72(6):479-87. doi: 10.5603/KP.a2014.0022. Epub 2014 Feb 14. No abstract available. PubMed 24526550 ↗
  • Musialek P, Mazurek A, Trystula M, Borratynska A, Lesniak-Sobelga A, Urbanczyk M, Banys RP, Brzychczy A, Zajdel W, Partyka L, Zmudka K, Podolec P. Novel PARADIGM in carotid revascularisation: Prospective evaluation of All-comer peRcutaneous cArotiD revascularisation in symptomatic and Increased-risk asymptomatic carotid artery stenosis using CGuard MicroNet-covered embolic prevention stent system. EuroIntervention. 2016 Aug 5;12(5):e658-70. doi: 10.4244/EIJY16M05_02. PubMed 27180302 ↗

Individual participant data

Plan to share: No

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 Sep 2015 (actual). Primary completion is estimated for Jun 2022, 81 months after the start.

Of 40 interventional studies with no phase under Carotid Artery Diseases, half reached primary completion within 28 months of starting (the median), counting those still running; a quarter within 19 and three quarters within 58. This study's planned 81 months is above that.

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

Registered
Jan 15, 2020
First posted
Feb 17, 2020
StartActual
Sep 1, 2015
Primary completionEst.
Jun 2022
CompletionEst.
Jun 2026
Last update
Mar 29, 2022
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 29, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04271033
Lead sponsor
John Paul II Hospital, Krakow
Responsible party
Sponsor
First posted
Feb 17, 2020
Start date
Sep 1, 2015
Primary completion
Jun 2022 (estimated)
Completion
Jun 2026 (estimated)
Last update
Mar 29, 2022

Study contacts

Piotr Musialek, MD, PhD
Contact
p.musialek@szpitaljp2.krakow.pl
+48126142287
Piotr Musialek, MD, PhD
principal investigator · Jagiellonian University

Oversight

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

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