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NCT Number: NCT06907147

SPYRAL GEMINI Pilot Study

The purpose of the SPYRAL GEMINI Pilot Study is to evaluate that multi-organ denervation with the Gemini System is safe and provide evidence of blood pressure reduction when studied in an uncontrolled hypertensive population with and without high cardiovascular risk.

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Key information

About this study

This study is exploratory in nature and will evaluate procedural and long-term safety of multi-organ denervation (MDN) and provide preliminary efficacy data in two parallel single arm cohorts:

  • Gemini Pilot Off Med: MDN for Hypertension Off Anti-hypertensive Meds and,
  • Gemini Pilot On Med: MDN for Hypertension and High Cardiovascular Risk On Anti-hypertensive Meds

There is no pre-specified primary endpoint; however, the data will be used for hypothesis generation to be evaluated and confirmed in subsequent clinical investigation(s).

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

All Subjects (both cohorts):

  • ≥18 and ≤80 years of age.
  • Diagnosed with HTN and has a baseline office SBP ≥150 mmHg and <180 mmHg and an office DBP ≥ 90 mmHg.
  • 24-hour average SBP ≥140 mmHg and <170 mmHg measured by ABPM at Baseline.

Exclusion criteria

  • Individual lacks appropriate renal artery OR common hepatic artery anatomy.
  • Prior renal or hepatic denervation.
  • History of NYHA Class III or IV heart failure within 6 months of screening visit.
  • Stroke or transient ischemic attack (TIA) within 6 months of screening visit or any history of stroke leading to permanent disability.
  • Documented Type 1 diabetes or use of insulin within 6 months.
  • Secondary cause of hypertension.
  • Documented condition that would prohibit or interfere with ability to obtain an accurate blood pressure measurement.
  • Estimated glomerular filtration rate (eGFR) of <40
  • Pregnant, nursing or planning to become pregnant during the study.
  • Primary pulmonary arterial hypertension.
  • History or evidence of active / suspected chronic liver or biliary disease.
  • Current or chronic pancreatitis.

Treatment and study plan

Multi-Organ Denervation Gemini System

Device

After angiography according to standard procedures, subjects are treated with renal denervation followed by hepatic denervation.

Primary outcomes

  1. Change in office blood pressure

    Time frame: From baseline to 36 months post-procedure

Other outcomes

  1. Change in 24-hour ambulatory blood pressure

    Time frame: From baseline to 3 and 6 months post-procedure

    Change in blood pressure from baseline as measured by 24-hour Ambulatory Blood Pressure Monitoring (ABPM) at 3-and 6-months post-procedure

  2. Change in daytime blood pressure

    Time frame: From baseline to 3 and 6 months post-procedure

    Change in daytime blood pressure from baseline as measured by 24-hour Ambulatory Blood Pressure Monitoring (ABPM) at 3- and 6-months post-procedure

  3. Change in nighttime blood pressure

    Time frame: From baseline to 3 and 6 months post-procedure

    Change in nighttime blood pressure from baseline as measured by 24-hour Ambulatory Blood Pressure Monitoring (ABPM) at 3- and 6-months post-procedure

  4. Change in office blood pressure

    Time frame: From baseline to 1, 3, 6, 12, 24 and 36 months post-procedure

    Change in office blood pressure from baseline at 1-, 3-, 6-, 12-, 24- and 36-months post-procedure

  5. Change in home blood pressure (HBP)

    Time frame: From baseline to 1, 3, 6, 12, 24 and 36 months post-procedure

    Change in home blood pressure (HBP) from baseline at 1-, 3-, 6-, 12-, 24- and 36-months post-procedure

  6. Incidence of achieving target office systolic blood pressure (SBP<140 mmHg)

    Time frame: From baseline to 1, 3, 6, 12, 24 and 36 months post-procedure

    Incidence of achieving target office systolic blood pressure (SBP<140 mmHg) at 1-, 3-, 6-, 12-, 24- and 36-months post-procedure

  7. All-cause mortality

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  8. Significant embolic event resulting in end-organ damage

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  9. Vascular complications

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  10. Hospitalization for hypertensive crisis not related to non-adherence with medications or the protocol

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  11. Major bleeding requiring transfusion

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  12. Hepatic Arterial Damage requiring intervention (i.e., perforation, dissection, occlusion, aneurysm)

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  13. Hepatic artery thrombosis

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  14. New Hepatic Stenosis >70%, confirmed by angiography

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  15. Aminotransferase Elevation(s) >3x the upper limit of normal

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  16. Myocardial Infarction

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  17. Stroke

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  18. Renal artery re-intervention

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  19. New renal artery stenosis >70% confirmed by angiography

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  20. End Stage Renal Disease

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  21. Increase in serum creatinine >50% from Baseline

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

  22. Any of the following requiring intervention or hospitalization: Pancreatitis, Biliary stricture, New onset biliary dyskinesia, Acute cholecystitis, Sphincter of Oddi dysfunction

    Time frame: From pre-procedure to immediately after the procedure, 1, 3, 6, 12, 24 and 36 months post-procedure

Study contacts

Contact information is provided by the study sponsor or research team.

Cecile Mahoney

CONTACT

[email protected]

+17635051057

Sponsors and collaborators

Lead sponsor

Medtronic Vascular

Industry

Registry information

Official study title

Global Pilot Study of rEnal and Hepatic coMbINed denervatIon in Subjects With Uncontrolled Hypertension With and Without High Cardiovascular Risk

Acronym: SPYRAL GEMINI

Important dates

Study start
2025
Primary completion
2029
Study completion
2029
First posted
Apr 2, 2025
Registry last updated
Jun 24, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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