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A Study of Renal Denervation in Patients With Treatment Resistant Hypertension (PaCE)

This study has been terminated.
(Manufacturer updated device technology.)
Mars Excellence in Clinical Innovation and Technology Evaluation
Information provided by (Responsible Party):
Dr. Harindra Wijeysundera, Sunnybrook Health Sciences Centre Identifier:
First received: June 26, 2013
Last updated: October 10, 2014
Last verified: October 2014
The purpose of this study is to evaluate the clinical and economic impact of implementation of renal denervation with the Symplicity™ Catheter System for treatment-resistant hypertension in Ontario, Canada.

Condition Intervention
Treatment-Resistant Hypertension
Device: Renal denervation device

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Pragmatic Randomized Clinical Evaluation of Renal Denervation for Treatment Resistant Hypertension

Further study details as provided by Sunnybrook Health Sciences Centre:

Primary Outcome Measures:
  • Average systolic 24-hour ambulatory blood pressure [ Time Frame: 6 months ]

Secondary Outcome Measures:
  • Proportion of patients achieving target systolic blood pressure (on average 24-hour ambulatory blood pressure of <130 mmHg) on the same or fewer medications at the time of randomization [ Time Frame: 6 months ]
  • Average daytime and average night-time systolic ambulatory blood pressure [ Time Frame: 6 months ]
  • Variability of 24-hour ambulatory systolic blood pressure [ Time Frame: 6 months ]
  • Average office blood pressure using an approved, automated office blood pressure device [ Time Frame: 6 months ]
  • Hypertensive medication complexity index (MRCI) [ Time Frame: 6 months ]
  • Number of hypertensive medications [ Time Frame: 6 months ]
  • Peri-procedural mean cost per patient in Canadian dollars [ Time Frame: 12 months ]
  • Generic quality of life (EQ-5D) [ Time Frame: 6 months ]
  • Body Mass Index (BMI) [ Time Frame: 6 months ]
  • 24-hour urine sodium [ Time Frame: 6 months ]
  • Acute periprocedural renal injury [ Time Frame: 72 hours post procedure ]
  • Creatinine clearance measured on 24-hour urine (% change from baseline & indexed to Body Surface Area) [ Time Frame: 6 months ]
  • Vascular complications (dissection, pseudoaneurysm, AV fistula) [ Time Frame: 6 months ]
  • Evidence of renal artery stenosis compared to pre-procedure (determined by renal imaging, CT or MRA) for early intervention group [ Time Frame: 6 months ]
  • Composite cardiovascular endpoints (fatal & non-fatal MI, new onset heart failure, stroke, beginning dialysis, hospitalization for cardiovascular/renal reasons, increase in hypertension medications) [ Time Frame: 6 months ]
  • Microalbumin to creatinine ratio (MACR) from random urine sample (% change from baseline) [ Time Frame: 6 months ]
  • 24-hour urine sodium (% change from baseline) [ Time Frame: 6 months ]

Enrollment: 8
Study Start Date: October 2013
Study Completion Date: October 2014
Primary Completion Date: October 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Early renal denervation
Renal denervation takes place immediately after patient is randomized.
Device: Renal denervation device
Other Name: Medtronic Symplicity™ Catheter Device
Delayed renal denervation
Renal denervation takes place 6 months after the patient is randomized.
Device: Renal denervation device
Other Name: Medtronic Symplicity™ Catheter Device

Detailed Description:
This is a pragmatic randomized trial of renal nerve denervation for treatment resistant hypertension. This is part of a ministry sponsored MaRS-EXCITE program, to conduct early market health technology assessment, in order to determine appropriateness for provincial funding. We will assess the effectiveness, safety, economic attractiveness and feasibility of implementation of renal nerve denervation for treatment resistant hypertension. This will involve a new model of care which will include a multi-disciplinary team approach to these patients. Treatment resistant hypertension is defined as patients with uncontrolled hypertension despite being on optimal doses of 3 or more anti-hypertensive medications. Patients will be randomized to either standard treatment or renal nerve denervation and followed for 6 months to determine impact on blood pressure.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Ontario residents
  • Aged 18 and over
  • Diagnosis of treatment-resistant hypertension after assessment and optimization by a hypertension specialist following recommended evaluation and diagnosis as outlined by the American Heart Association
  • Office systolic blood pressure ≥ 160 mmHg (≥ 150 mmHg for patients with type II diabetes mellitus) prior to optimization by a hypertension specialist
  • Baseline average systolic 24 hour ambulatory blood pressure of ≥ 135 mmHg after optimization and prior to randomization
  • Prescribed 3 or more antihypertensive medications of different classes, both prior to optimization and at randomization, one of which must be a diuretic (a medication can be counted more than once if it acts on different receptors)
  • Suitable renal artery anatomy based on CT/MRI/renal angiography imaging: both renal arteries > 20 mm in length and > 4 mm in diameter without significant fibromuscular disease or renal artery stenosis (>50%)

Exclusion Criteria:

  • Secondary causes of hypertension:

    1. Primary aldosteronism (secondary to adrenal adenoma)
    2. Chronic kidney disease: creatinine clearance or eGFR < 45 ml/min/1.73m² (measured on 24 hour urine preferably or MDRD)
    3. Pheochromocytoma
    4. Cushing's syndrome
    5. Aortic coarctation (differential in brachial or femoral pulses, systolic bruit)
  • Type 1 diabetes mellitus
  • Pregnancy
  Contacts and Locations
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Please refer to this study by its identifier: NCT01895140

Canada, Ontario
Sunnybrook Research Institute
Toronto, Ontario, Canada, M4N 3M5
St. Michael's Hospital
Toronto, Ontario, Canada, M5B 1W8
Sponsors and Collaborators
Dr. Harindra Wijeysundera
Mars Excellence in Clinical Innovation and Technology Evaluation
Principal Investigator: Harindra C. Wijeysundera, MD Sunnybrook Research Institute
  More Information

Responsible Party: Dr. Harindra Wijeysundera, Interventional Cardiologist, Sunnybrook Health Sciences Centre Identifier: NCT01895140     History of Changes
Other Study ID Numbers: 322-2012
Study First Received: June 26, 2013
Last Updated: October 10, 2014

Keywords provided by Sunnybrook Health Sciences Centre:
Treatment-resistant hypertension
Renal denervation
Ambulatory blood pressure

Additional relevant MeSH terms:
Vascular Diseases
Cardiovascular Diseases processed this record on April 28, 2017