IMPACT-HTN Study of Patients With Hypertension

June 24, 2026 updated by: Vivek Bhalla

Prospective Early Patient Experience Initiative (IMPACT-HTN)

An estimated 120 million people have high blood pressure (hypertension) in the US, of which approximately 10% have resistant hypertension. This study aims to enroll patients who continue to have hypertension while being treated with at least two medications. The study will follow patients for approximately 3 months and collect real-world information on changes in their health to identify an ideal patient profile that would benefit from 4th-line antihypertensive therapies, including, but not limited to, FDA-approved aprocitentan, renal denervation, mineralocorticoid receptor antagonists, etc.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Detailed Description

To date, there is little multi center data on the management of patients in HTN centers. Elevated blood pressure is the leading global risk factor for death and nonfatal cardiovascular events, primarily strokes, myocardial infarctions, heart failure leading to hospitalization, and end-stage renal disease. After a one-year pilot with two sites, this study plans to expand to additional sites to build a national registry for resistant hypertension research.

This collaborative, prospective study will evaluate the effectiveness and safety of resistant hypertension management, including the use of novel drugs with the aim of defining an ideal patient profile that would benefit from various 4th-line antihypertensive therapies, including, but not limited to, aprocitentan, renal denervation, mineralocorticoid receptor antagonists, etc.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
100

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Palo Alto, California, United States, 94304
        • Stanford University Hypertension Center
        • Contact:
    • North Carolina
      • Durham, North Carolina, United States, 27710

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

The study population will include 100 patients with inadequately controlled blood pressure despite the use of two therapies.

Description

Inclusion Criteria:

  • Signed and dated informed consent form
  • Ability to answer survey questions and to report blood pressure reading monthly
  • Male and female participants; 18 years or older
  • Treated with at least 2 antihypertensive therapies of different pharmacological classes for at least 4 weeks before the screening visit
  • Mean Sitting Systolic Blood Pressure (SiSBP) greater or equal to 130 mmHg

Exclusion Criteria:

  • Confirmed severe hypertension (grade 3) defined as SiSBP greater than or equal to 180 mmHg and/or Sitting Diastolic Blood Pressure (SiDBP) greater than or equal to 110 mmHg
  • Clinically significant unstable cardiac disease at screening or in the past in the opinion of the investigator
  • Heart failure NYHA functional class III and IV or NT-proBNP > 500 pg/mL
  • Severe renal insufficiency or eGFR < 15 mL/min/1.73m2
  • Moderate to severe hepatic impairment (Child-Pugh B and C) or elevated aminotransferase (> 3 x ULN)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Difference between exposure groups in change from baseline to Month 3 mean systolic blood pressure
Time Frame: 90 days
90 days

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
Change from baseline to Month 3 in urine albumin-to-creatinine ratio (UACR) in the overall cohort and between exposure groups
Time Frame: 90 days
90 days
Interaction between exposure group and baseline albuminuria category on UACR change from baseline to Month 3
Time Frame: 90 days
90 days

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Time Frame
Change from baseline to Month 3 in routinely collected biomarkers
Time Frame: 90 days
90 days
Difference between exposure groups in change from baseline to Month 3 biomarker results
Time Frame: 90 days
90 days
Incidence of edema through Month 3 for the overall cohort
Time Frame: 90 days
90 days
Comparative incidence of edema; for example, among users of aprocitentan versus unexposed patients
Time Frame: 90 days
90 days
Comparative incidence of hyperkalemia; for example, among users of mineralocorticoid receptor antagonists vs. unexposed patients
Time Frame: 90 days
90 days
Incidence of hospitalization due to heart failure through Month 3 for the overall cohort
Time Frame: 90 days
90 days
Comparative incidence of hospitalizations due to heart failure; for example, among users of aprocitentan versus unexposed patients
Time Frame: 90 days
90 days
Proportion discontinuing any antihypertensive medication by Month 3 for any reason for the overall cohort
Time Frame: 90 days
90 days
Comparison of antihypertensive medication discontinuation between exposure groups
Time Frame: 90 days
90 days
Proportion discontinuing any antihypertensive medication by Month 3 due to edema
Time Frame: 90 days
90 days
Comparison of antihypertensive medication discontinuation due to edema between exposure groups
Time Frame: 90 days
90 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Vivek Bhalla

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Idorsia Pharmaceuticals Ltd.
Duke University Medical Center, Durham, NC

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
July 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 1, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 1, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
May 6, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 6, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 12, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 29, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 24, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
June 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 86433

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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