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Can a common blood pressure drug better protect the heart?

NCT ID NCT05593055

Disease control Sponsor: Brigham and Women's Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study compares two blood pressure medications, eplerenone and chlorthalidone, in 75 adults with high blood pressure and thickened heart muscle. Researchers want to see if eplerenone improves blood flow to the heart and how efficiently the heart uses oxygen. Participants will take one of the two drugs for several weeks, and heart function will be measured using imaging tests.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Eplerenone and Chlorthalidone (with potassium)
What this could lead to
If eplerenone works better, it could point to a more effective way to protect the heart in people with high blood pressure and thickened heart muscle.
What could go wrong
This is a small, early-phase study (75 people) comparing two existing drugs, so results may not apply to everyone. The study looks at heart function measures, not long-term outcomes like heart attacks.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 4

Runs after approval, following long-term safety and how well the treatment works in everyday use.

Participants

About 75 people

The number the study aims to enrol. It can still change while the study runs.

Started

Aug 2023

Expected to finish

Dec 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 75 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. History of hypertension 1. Seated systolic BP \< 180 mmHg and diastolic \< 110 mmHg if on antihypertensives 2. Seated systolic BP 141-200 mmHg and/or diastolic BP 90-114 mmHg if not on antihypertensives 2. LVH by echocardiogram 1. For men: interventricular septum thickness ≥ 12mm 2. For women: interventricular septum thickness ≥ 11mm 3. We will also allow inclusion of people with treated hypothyroidism, pre-diabetes and diabetes controlled by diet, exercise, and/or metformin. Exclusion Criteria: * Use of MR antagonist (eplerenone, spironolactone, or finerenone) or amiloride (amiloride inhibits ENaC, which is a key mediator of MR's actions) within the past year * Orthostatic hypotension * Major medical illness, including uncontrolled diabetes mellitus (Hemoglobin A1c \>7.5) * LV ejection fraction \< 40% * New York Heart Association class III to IV congestive heart failure or unstable angina * A history in the prior 6 months of Q-wave myocardial infarction, stroke, transient ischemic attack, percutaneous transluminal coronary angioplasty, or coronary artery bypass graft * History of secondary hypertension * Known genetic cardiomyopathy * Renal disease (seum creatinine \>1.5 mg/dL for men and \>1.3 mg/dL for women) * Hepatic disease * Bronchospastic lung disease * Alcohol or substance abuse * Hormone replacement therapy * Abnormal values for electrolytes, liver enzymes or TSH * Pregnancy or lactation * All individuals \<18 and \>75 years will be excluded due to safety concerns of administering an angiotensin-II infusion in these patient groups.

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Conditions

The condition(s) this trial relates to.

hypertensive disorder Hypertrophy, Left Ventricular

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Hypertension Left ventricular hypertrophy

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Brigham and Women's Hospital

    RECRUITING

    Boston, Massachusetts, 02115, United States

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