- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04181606
Age Comparisons of Exercising Muscle O2 Supply in Healthy Adults: Effects of Esmolol Infusion
February 13, 2024 updated by: David N. Proctor, PhD
This study will test the central hypothesis that postmenopausal women will demonstrate increased oxygen extraction in active leg muscle during leg cycling exercise while receiving an infusion of Esmolol, a fast-acting β1 selective antagonist, when compared to premenopausal women
Study Overview
Status
Completed
Conditions
Detailed Description
This study will test the central hypothesis that postmenopausal women will demonstrate increased oxygen extraction in active leg muscle during leg cycling exercise while receiving an infusion of Esmolol, a fast-acting β1 selective antagonist, when compared to premenopausal women.
β1 selective antagonists (or "β1 blockers") are used to lower heart rate and improve O2 supply-to-demand balance in patients with coronary artery disease.
By using esmolol to attenuate the central sympathetic response to exercise (increased heart rate and cardiac output) we can examine peripheral mechanisms of O2 delivery.
The current project will evaluate how older postmenopausal women adjust active muscle O2 supply to an acute reduction in systemic O2 delivery during large muscle dynamic exercise when compared to younger premenopausal women.
Study Type
Interventional
Enrollment (Actual)
37
Phase
- Early Phase 1
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
-
-
Pennsylvania
-
University Park, Pennsylvania, United States, 16803
- Noll Laboratory
-
-
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
Ages Eligible for Study
21 years to 85 years (Adult, Older Adult)
Accepts Healthy Volunteers
Yes
Description
3.1 Inclusion Criteria
- Capable of giving informed consent
- Premenopausal women ages 18-35 years OR post-menopausal women ages 55-70 years
- Satisfactory medical history and physical exam, as determined by a CRC clinician
- Not currently taking medications affecting heart rate or contractility
- Fluent in written and spoken English
3.2 Exclusion Criteria
Participants who will not be studied are those who:
- Are less than 19 years of age or more than 70 years of age
- Are pregnant or lactating
- Are prisoners or institutionalized individuals or unable to consent
- Diagnosed renal failure (Creatinine >2.0 mg/dl)
- Diagnosed liver disease (ALT and AST 2 times normal)
- Diagnosed Reynaud's disease
- Have uncontrolled diabetes
- Have uncontrolled hypertension
- Have a left ventricular ejection fraction < 40%
- Have a recent history of unstable angina or myocardial infarction (<6 months), unstable angina, or use of nitrate medications within past 2 weeks
10. Severe lung disease (i.e., on supplemental oxygen or frequently use rescue inhalers) 11. Diagnosed bleeding or clotting disorder or recent blood transfusion 12. Have asthma, history of thyroid issues or hyperkalemia 13. Known use of recreational drugs 14. Methylphenidate use
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
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Esmolol Infusion
Drug: Esmolol Hydrochloride Dosage form: Intravenous Infusion Dosage/Frequency: 0.5 mg/(kg Fat Free Mass·min) for 3 min followed by a maintenance infusion of 0.25 mg/(kg Fat Free Mass·min) for remainder of trial, up to a maximum of 1 hour.
|
Subject rests quietly while drug infusion begins (3 min loading dose followed by 10 min of maintenance dose) until heart rate and blood pressure stabilize.
The Esmolol loading dose will be 0.5 mg/kg fat free mass/min administered over the first 3 minutes, followed by a maintenance dose of 0.25 mg/kg fat free mass/min for the remainder of the protocol (maximum of 60 minutes).
Other Names:
The subject will grip at 40% of their maximum and maintain that grip for 90 seconds.
Once at rest and once during heavy intensity cycling.
Subjects will pedal for 2-4 minutes at a very light intensity (20W), followed immediately by 5 minutes at a moderate intensity (at a workload intended to elicit 85% of the oxygen consumption observed at the lactate threshold), and 5 minutes of cycling at a heavy intensity (at a workload estimated to elicit oxygen consumption half way between those observed at the lactate threshold and respiratory compensation point).
Subjects will then continue cycling at the heavy intensity for 90 seconds while performing isometric handgrip exercise.
|
Placebo Comparator: Saline Infusion
Saline infusion volume/rate matched to the calculated dose of esmolol.
|
Subject rests quietly while drug infusion begins (3 min loading dose followed by 10 min of maintenance dose) until heart rate and blood pressure stabilize.
The subject will grip at 40% of their maximum and maintain that grip for 90 seconds.
Once at rest and once during heavy intensity cycling.
Subjects will pedal for 2-4 minutes at a very light intensity (20W), followed immediately by 5 minutes at a moderate intensity (at a workload intended to elicit 85% of the oxygen consumption observed at the lactate threshold), and 5 minutes of cycling at a heavy intensity (at a workload estimated to elicit oxygen consumption half way between those observed at the lactate threshold and respiratory compensation point).
Subjects will then continue cycling at the heavy intensity for 90 seconds while performing isometric handgrip exercise.
Saline will be rate/volume matched to the calculated esmolol dose.
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Tissue Saturation Index - Active leg muscle
Time Frame: Last 60 seconds of Rest, Moderate exercise, and Heavy Exercise.
|
The primary outcome variable is the difference in the change in skeletal muscle oxygenation (TSI%) in the active leg muscle from baseline during recumbent cycling exercise between saline and esmolol (∆∆TSI%) using near-infrared spectroscopy.
|
Last 60 seconds of Rest, Moderate exercise, and Heavy Exercise.
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Tissue Saturation Index - Inactive forearm muscle
Time Frame: Last 60 seconds of Rest, Moderate exercise, and Heavy Exercise.
|
Difference in the change in skeletal muscle oxygenation (TSI%) in the inactive forearm muscle from baseline during recumbent cycling exercise between saline and esmolol (∆∆TSI%) using near-infrared spectroscopy.
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Last 60 seconds of Rest, Moderate exercise, and Heavy Exercise.
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Blood Pressure
Time Frame: At rest and 3 minutes into moderate exercise and heavy exercise.
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Blood Pressure recorded via an automatic sphygmomanometer (SunTech Tango)
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At rest and 3 minutes into moderate exercise and heavy exercise.
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Heart Rate
Time Frame: Last 60 seconds of Rest, Moderate exercise, and Heavy Exercise.
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Heart rate recorded via EKG
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Last 60 seconds of Rest, Moderate exercise, and Heavy Exercise.
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Cardiac Output
Time Frame: Last 60 seconds of Rest, Moderate exercise, and Heavy Exercise.
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Cardiac Output recorded using bioimpedance cardiography
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Last 60 seconds of Rest, Moderate exercise, and Heavy Exercise.
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
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 (Actual)
February 2, 2022
Primary Completion (Actual)
April 12, 2023
Study Completion (Actual)
April 12, 2023
Study Registration Dates
First Submitted
November 26, 2019
First Submitted That Met QC Criteria
November 26, 2019
First Posted (Actual)
November 29, 2019
Study Record Updates
Last Update Posted (Estimated)
February 15, 2024
Last Update Submitted That Met QC Criteria
February 13, 2024
Last Verified
February 1, 2024
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Cardiovascular Diseases
- Vascular Diseases
- Arteriosclerosis
- Arterial Occlusive Diseases
- Atherosclerosis
- Peripheral Arterial Disease
- Peripheral Vascular Diseases
- Physiological Effects of Drugs
- Adrenergic beta-Antagonists
- Adrenergic Antagonists
- Adrenergic Agents
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Adrenergic beta-1 Receptor Antagonists
- Esmolol
Other Study ID Numbers
- 10736
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Yes
Studies a U.S. FDA-regulated device product
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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