ClinicalTrials.gg
RecruitingNCT01534299Updated Oct 23, 2026

Global SYMPLICITY Registry (GSR) DEFINE

An observational study in Hypertension, sponsored by Medtronic Vascular. Recruiting at 2 sites in 2 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-10-23.

Sponsored by Medtronic Vascular (part of Medtronic) · Observational

From the registry’s dates

  • Started Feb 2012; still recruiting 14 years 9 months later.
Study type
Observational
Model
Case-only
Time perspective
Prospective
Enrollment
5,000
Ages
18 Years and older
Sex
All
01

Study summary

This is a prospective, multi-center, single-arm, non-interventional and open-label registry. The purpose of the registry is to document the long-term safety and effectiveness of renal denervation in a real world patient population with hypertension GSR DEFINE is the continuation of the Global SYMPLICITY Registry and collectively will enroll approximately 5000 patients with hypertension who undergo the renal denervation procedure, from over 300 sites worldwide. Subjects included in GSR DEFINE will be followed for a minimum of 1 year and up to 5 years post-procedure. Patients with uncontrolled hypertension will be enrolled in accordance with the inclusion criteria specified in the protocol.

Read the detailed description

This registry will collect data prospectively on patients that receive renal denervation and treatment will be applied according to the 'Intended Use' in the IFU. The treatment will be performed according to routine hospital practice and no additional tests are required specific to the registry. This registry will serve as a tool to collect clinical data in order to expand the knowledge base of safety, effectiveness and functionality of the Medtronic renal denervation system in a real world patient population.

The key measures collected for the patients will be inclusive of, but are not limited to, blood pressure measurements, change in medications, eGFR changes (based on the MDRD formula) and clinical data pertaining to hypertension .

The inclusion criteria for the registry includes:

  • Age ≥ 18 years or minimum age as required by local regulations
  • The patient is an acceptable candidate for renal denervation based upon the Instructions For Use for the Medtronic renal denervation system. The procedure must be performed with an initial use, market-released Medtronic renal denervation catheter.
  • The patient or legal representative has been informed of the nature of the registry has consented to participate and authorized the collection and release of this medical information by signing a consent form ("Patient Informed Consent Form" or "Patient Data Release Authorization Form")
02

Conditions studied

  • Hypertension

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03

In context

Hypertension

6,114 studies on the registry are indexed under Hypertension; 912 are open to participants now.

This study's planned enrollment of 5,000 is above the median of 350 across 1,163 observational studies indexed under Hypertension.

Browse Hypertension studies →

Lead sponsor

Medtronic Vascular is the lead sponsor of 60 studies on the registry; 7 are open to participants now.

Of its 6 completed or terminated interventional studies of FDA-regulated products, 6 (100%) have results posted.

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
Sampling method
Non-probability sample

Study population

Subjects undergoing renal denervation procedure for hypertension

Eligibility criteria

Inclusion Criteria:

  • Age ≥ 18 years or minimum age as required by local regulations
  • The patient is an acceptable candidate for renal denervation based upon the Instructions For Use for the Medtronic renal denervation system. The procedure must be performed with an initial use, market-released Medtronic renal denervation catheter.
  • The patient or legal representative has been informed of the nature of the registry has consented to participate and authorized the collection and release of this medical information by signing a consent form ("Patient Form" or "Patient Data Release Authorization Form")
Terms in these criteria, in plain language(1)

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.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Observational model
Case-only
Time perspective
Prospective
Enrollment
5,000 participants (estimated)
Patient registry
No

Groups and cohorts

  • Renal Denervation Treatment

    All patients treated with renal denervation procedure will be enrolled as part of this single arm registry

    Device: Medtronic Renal Denervation System

Interventions

  • DeviceMedtronic Renal Denervation System

    The Symplicity renal denervation system is comprised of a single-use, disposable catheter and a reusable radiofrequency (RF) generator. The Symplicity renal denervation system has CE Marking for the intended use of delivering low-level radiofrequency energy through the wall of the renal artery to denervate the human kidney.

06

What researchers measure

Primary outcomes

  1. BP Measurements

    Blood pressure changes from baseline (Office Setting and 24-hr Ambulatory measurements)

    Time frame: 6 months

07

Study locations

2 of 2 sites recruiting
08

References and documents

Publications

  • Nolde JM, Kiuchi MG, Carnagarin R, Ward NC, Wanten M, Bohm M, Mahfoud F, Schmieder RE, Narkiewicz K, Schlaich MP. Impact of centrally acting sympatholytic agents on the blood pressure response to renal denervation. J Hypertens. 2026 Apr 1;44(4):592-599. doi: 10.1097/HJH.0000000000004219. Epub 2025 Dec 10. PubMed 41411629 ↗
  • Mihailidou AS, Mahfoud F, Schlaich M, Schmieder R, Narkiewicz K, Ruilope L, Fahy M, Bohm M, Mancia G, Nickel L, Hettrick DA, Weil J. Sex stratified analysis of patients with resistant hypertension from the Global SYMPLICITY Registry of renal denervation. Hypertens Res. 2026 Mar;49(3):904-915. doi: 10.1038/s41440-025-02446-y. Epub 2025 Nov 20. PubMed 41266871 ↗
  • Schlaich MP, Mahfoud F, Bohm M, Narkiewicz K, Ruilope L, Williams B, Mancia G, Sharif F, Ribichini F, Lung TH, Shetty S, Schmieder RE. Renal Denervation in Patients With Moderate to Severe Chronic Kidney Disease. Hypertension. 2025 Dec;82(12):2252-2261. doi: 10.1161/HYPERTENSIONAHA.125.25470. Epub 2025 Oct 29. PubMed 41159269 ↗
  • Mahfoud F, Mancia G, Schmieder RE, Ruilope L, Narkiewicz K, Schlaich M, Williams B, Ribichini F, Weil J, Almerri K, Sharif F, Lauder L, Wanten M, Fahy M, Bohm M. Outcomes Following Radiofrequency Renal Denervation According to Antihypertensive Medications: Subgroup Analysis of the Global SYMPLICITY Registry DEFINE. Hypertension. 2023 Aug;80(8):1759-1770. doi: 10.1161/HYPERTENSIONAHA.123.21283. Epub 2023 Jun 15. PubMed 37317866 ↗
  • Mahfoud F, Mancia G, Schmieder RE, Ruilope L, Narkiewicz K, Schlaich M, Williams B, Ribichini F, Weil J, Kao HL, Rodriguez-Leor O, Noory E, Ong TK, Unterseeh T, de Araujo Goncalves P, Zirlik A, Almerri K, Sharif F, Lauder L, Wanten M, Fahy M, Bohm M. Cardiovascular Risk Reduction After Renal Denervation According to Time in Therapeutic Systolic Blood Pressure Range. J Am Coll Cardiol. 2022 Nov 15;80(20):1871-1880. doi: 10.1016/j.jacc.2022.08.802. PubMed 36357087 ↗
  • Mahfoud F, Mancia G, Schmieder R, Narkiewicz K, Ruilope L, Schlaich M, Whitbourn R, Zirlik A, Zeller T, Stawowy P, Cohen SA, Fahy M, Bohm M. Renal Denervation in High-Risk Patients With Hypertension. J Am Coll Cardiol. 2020 Jun 16;75(23):2879-2888. doi: 10.1016/j.jacc.2020.04.036. PubMed 32527396 ↗
  • Mahfoud F, Bakris G, Bhatt DL, Esler M, Ewen S, Fahy M, Kandzari D, Kario K, Mancia G, Weber M, Bohm M. Reduced blood pressure-lowering effect of catheter-based renal denervation in patients with isolated systolic hypertension: data from SYMPLICITY HTN-3 and the Global SYMPLICITY Registry. Eur Heart J. 2017 Jan 7;38(2):93-100. doi: 10.1093/eurheartj/ehw325. PubMed 28158510 ↗
  • Linz D, Mancia G, Mahfoud F, Narkiewicz K, Ruilope L, Schlaich M, Kindermann I, Schmieder RE, Ewen S, Williams B, Bohm M; Global SYMPLICITY Registry Investigators. Renal artery denervation for treatment of patients with self-reported obstructive sleep apnea and resistant hypertension: results from the Global SYMPLICITY Registry. J Hypertens. 2017 Jan;35(1):148-153. doi: 10.1097/HJH.0000000000001142. PubMed 27906840 ↗
  • Kim BK, Bohm M, Mahfoud F, Mancia G, Park S, Hong MK, Kim HS, Park SJ, Park CG, Seung KB, Gwon HC, Choi DJ, Ahn TH, Kim CJ, Kwon HM, Esler M, Jang YS. Renal denervation for treatment of uncontrolled hypertension in an Asian population: results from the Global SYMPLICITY Registry in South Korea (GSR Korea). J Hum Hypertens. 2016 May;30(5):315-21. doi: 10.1038/jhh.2015.77. Epub 2015 Jul 9. PubMed 26155994 ↗
  • Bohm M, Mahfoud F, Ukena C, Hoppe UC, Narkiewicz K, Negoita M, Ruilope L, Schlaich MP, Schmieder RE, Whitbourn R, Williams B, Zeymer U, Zirlik A, Mancia G; GSR Investigators. First report of the Global SYMPLICITY Registry on the effect of renal artery denervation in patients with uncontrolled hypertension. Hypertension. 2015 Apr;65(4):766-74. doi: 10.1161/HYPERTENSIONAHA.114.05010. Epub 2015 Feb 17. PubMed 25691618 ↗
09

Updates

1 registry update since Sep 25, 2026
Minor edits
Nothing that changes what the study is or who can join. Edited: verification date
1 update, last Oct 23, 2026
Show all 1 update
  1. Oct 23, 2026
    Minor edits only
    + 1 other change: verification date

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT01534299
Lead sponsor
Medtronic Vascular
Responsible party
Sponsor
First posted
Feb 16, 2012
Start date
Feb 2012
Primary completion
Jun 2027 (estimated)
Completion
Dec 2031 (estimated)
Last update
Oct 23, 2026

Study contacts

Michael Böhm, Prof.
principal investigator · University Hospital, Saarland
Giuseppe Mancia, Prof.
principal investigator · San Gerardo Hospital, Monza, Italy

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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