Effects of Percutaneous Transluminal Renal Angioplasty of Atherosclerotic Renal Artery Stenosis in High-Risk Patients.

N/ARecruitingNCT05834803

University of Aarhus80 enrolled

Overview

The goal of this clinical trial is to document a beneficial effect of percutaneous transluminal renal angioplasty (PTRA) of atherosclerotic renal artery stenosis in high-risk patients selected according to the criteria used in the DAN-PTRA study. The main questions the trial aims to answer are if renal artery stenting compared with optimal medical treatment alone has beneficial effects on: * Blood pressure * Kidney function * Hospitalizations for heart failure

Even with optimal medical care, patients with renovascular disease have a very high risk of cardiovascular events and an expected poor outcome. One treatment option of atherosclerotic renal artery stenosis is percutaneous transluminal renal angioplasty with stent placement. Renal artery stenting is, however, still a subject of debate as randomized trials have failed to show a benefit of this compared with optimal medical treatment alone. Following the results of the large CORAL trial in 2014, we established the national prospective DAN-PTRA study using strict and well-defined criteria to select patients for renal artery stenting. In this study, we observed a reduction in blood pressure, an improved kidney function, and a decrease in new hospital admissions due to heart failure after renal artery stenting. The DAN-PTRAII study is a nationwide high-quality randomized, sham-controlled clinical trial in patients with severe renovascular disease due to atherosclerotic renal artery stenosis. Only patients who fulfill the inclusion criteria on optimal medical treatment can enter the study and only the operator and his team will know whether the patients receive renal artery stenting or sham treatment. Participants will be followed closely for 6 months after the treatment to evaluate the effects of renal artery stenting compared with optimal medical treatment alone on blood pressure, kidney function and hospitalizations due to heart failure.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

TRIPLE

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1. One or more severe atherosclerotic renal artery stenoses defined as a stenosis ≥70% by catheter-based angiography. 2. In addition, at least one of the following high-risk clinical syndromes: 1. Resistant hypertension with average 24-hour ambulatory systolic blood pressure ≥150 mmHg despite ≥3 antihypertensive drugs including a diuretic, if tolerated, and each prescribed at optimal doses. 2. Rapidly declining kidney function with a reduction in estimated GFR of \>5 mL/min per 1.73m2 per year and average 24-hour ambulatory systolic blood pressure ≥140 mmHg despite ≥3 antihypertensive drugs including a diuretic, if tolerated, and each prescribed at optimal doses. 3. Hospital admissions with acute decompensated heart failure (≥2 hospitalizations for heart failure or ≥1 hospitalizations for sudden, "flash" pulmonary edema) with no obvious explanations such as nonadherence, left ventricular ejection fraction \<40%, or valvular heart disease and average 24-hour ambulatory systolic blood pressure ≥140 mmHg despite ≥3 antihypertensive drugs including a diuretic, if tolerated, and each prescribed at optimal doses. All 24-hour ambulatory blood pressure monitorings are performed after nurse-administered medication. Exclusion Criteria: * Unable to provide informed consent. * Treatment-resistant heart failure episodes presumed caused by renovascular disease. * Rapidly declining kidney function/acute kidney failure approaching the need for dialysis presumed caused by renovascular disease. * Fibromuscular dysplasia or other non-atherosclerotic renal artery stenosis known to be present prior to randomization. * Pregnancy or unknown pregnancy status in female of childbearing potential. * Kidney size \<7 cm (pole to pole length) supplied by target vessel. * Previous kidney transplant. * Previous PTRA treatment. * Presence of a renal artery stenosis not amenable for treatment with a stent. Patients who are not eligible for randomization but treated with renal artery stenting outside the protocol are followed according to the DAN-PTRAII protocol in order to account for all PTRA treatments performed in Denmark in the study period. Patients treated with renal artery stenting without randomization in the study period include patients with: 1. Treatment-resistant heart failure episodes presumed caused by renovascular disease. 2. Rapidly declining kidney function/acute kidney failure approaching the need for dialysis presumed caused by renovascular disease. 3. At least one of the listed high-risk clinical syndromes AND one or more significant atherosclerotic renal artery stenoses defined as a stenosis of 50-69% by catheter-based angiography with: * a mean translesional gradient of ≥10 mm Hg, or * a systolic translesional gradient of ≥20 mm Hg, or * a renal fractional flow reserve (Pd/Pa) of ≤0.8

Outcomes

Primary Outcomes

Change in 24-hour ambulatory systolic blood pressure

Defined as the between-group difference in the change in 24-hour ambulatory systolic blood pressure from baseline to 6 months.

Time frame: Baseline and 6 months

Secondary Outcomes

Change in estimated glomerular filtration rate (eGFR)

Defined as the between-group difference in the change in estimated glomerular filtration rate (eGFR) from baseline to 6 months.

Time frame: Baseline, Day 1, Day 7, Day 21, 6 weeks, 3 months, 4.5 months, and 6 months

Change in attended automated office systolic blood pressure

Defined as the between-group difference in the change in attended automated office systolic blood pressure from baseline to 6 months.

Time frame: Baseline, 3 months, and 6 months

Change in unattended automated office systolic blood pressure

Defined as the between-group difference in the change in unattended automated office systolic blood pressure from baseline to 6 months.

Time frame: Baseline, 3 months, and 6 months

Change in defined daily dose (DDD) of antihypertensive medications

Defined as the between-group difference in the change in defined daily dose (DDD) of antihypertensive medications from baseline to 6 months.

Time frame: Baseline, 3 months, and 6 months

Change in the number of antihypertensive medications

Defined as the between-group difference in the change in the number of antihypertensive medications from baseline to 6 months.

Time frame: Baseline, 3 months, and 6 months

Change in 24-hour ambulatory systolic blood pressure (statistically adjusted for treatment changes)

Defined as the between-group difference in the change in 24-hour ambulatory systolic blood pressure from baseline to 6 months, adjusted for changes in antihypertensive medication burden (1 DDD = 5 mmHg).

Time frame: Baseline, 3 months, and 6 months

Number of participants with cardiovascular or kidney outcomes

Clinical events from baseline to 6 months after renal artery stenting, compared with clinical events in the sham control group. Clinical events are defined using the same criteria as in the Cardiovascular Outcomes in Renal Atherosclerotic Lesions (CORAL) trial, except for progressive renal insufficiency (defined in CORAL as a reduction from baseline of 30% or more in estimated GFR). Clinical events included in the composite endpoint from baseline to 6-month follow-up are: 1. Death from cardiovascular causes 2. Death from renal causes 3. Stroke 4. Myocardial infarction 5. Hospitalization for congestive heart failure 6. Progressive renal insufficiency (a reduction from baseline of 50% or more in estimated GFR) 7. Permanent renal-replacement therapy Only the first event per participant is included in the composite.

Time frame: From baseline to 6 months after PTRA/sham

Number of deaths from any cause

Death from any cause from baseline to 6 months after renal artery stenting, compared with death from any cause in the sham control group.

Time frame: From baseline to 6 months after PTRA/sham

Change in health status on 12-item Short Form Health Survey (SF-12)

Defined as the between-group difference in the change in 12-item Short Form Health Survey (SF-12) scores from baseline to 6 months. Scores range from 0 to 100, with higher scores indicating better physical and mental health functioning.

Time frame: Baseline, 3 months, and 6 months

Number of serious adverse events (SAEs), procedure-related adverse events (≤24 hours), and postoperative adverse events (>24 hours) occurring within 30 days after the procedure

All SAEs, procedure-related adverse events (≤24 hours), and postoperative adverse events (\>24 hours) occurring within 30 days after the procedure will be systematically recorded. Events include, but are not limited to: 1. Death from any cause 2. Rupture, dissection, occlusion, or perforation of the renal artery 3. Stent thrombosis of the PTRA-treated renal artery 4. Embolic complications affecting the kidney or peripheral circulation (upper or lower extremity depending on access site) 5. Bleeding requiring transfusion 6. Embolization or nephrectomy due to bleeding or other complications 7. Access-related complications requiring treatment: bleeding, thrombosis, or pseudoaneurysm 8. Need for acute dialysis 9. Clinical events as defined above

Time frame: From baseline to 30 days after PTRA/sham

Evaluation of Diagnostic Techniques

As part of the study, the applicability of diagnostic techniques that remain insufficiently described in the context of renal artery stenosis will be evaluated separately according to the protocol. The following examinations will be assessed: (a) Doppler ultrasound, (b) echocardiography, (c) renography, (d) invasive pressure measurements across stenoses, (e) computational fluid dynamics (CFD) simulations, and (f) proteomics analysis.

Time frame: From baseline to 6 months after PTRA/sham

NCT05834803 - Effects of Percutaneous Transluminal Renal Angioplasty of Atherosclerotic Renal Artery Stenosis in High-Risk Patients. | Crick | Crick