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How blood pressure medicines change heart and blood flow measures in early pregnancy

Looks at labetalol, atenolol and nifedipine effects on circulation in early pregnancy.

Key facts

Who runs it
Marshall University
Where
Huntington, United StatesSee the site
Trial code
Registry title
Effect of Labetalol, Atenolol, and Nifedipine on Maternal Hemodynamics Measured by ICG in Early Pregnancy
Status
Recruiting
People taking part
60 people, planned
Started
3 Mar 2021
Planned end
Dec 2025
Type of study
Observational, 2 groups
Treatments tested
  • Labetalol
  • Atenolol
  • Nifedipine
Record updated
13 May 2025

Who can take part

AI summary

From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.

The trial is looking for women in early pregnancy (before 15 weeks) who attend the Maternal Hypertension Center at Cabell Huntington Hospital. It studies how three blood pressure drugs affect the heart and blood flow.

Age
18 to 45 years old
Sex
Women only
Disease stage
Early pregnancy, before 15 weeks of gestation. The record lists high blood pressure and cardiac output problems as conditions.

Main reasons for not taking part

  • Does not speak English
  • Younger than 18 or older than 45 years
  • Not willing or able to give consent
  • Pregnancy longer than 15 weeks

This trial only enrols pregnant participants. The registry sentence this rests on: Gestational age prior to 15 weeks gestation

The registry criteria, word for word

Show all 9 criteriaShow less

Who can take part

  • Patients presenting to Maternal Hypertension Center at Cabell Huntington Hospital
  • English speaking
  • 18-45 years old
  • Willing to provide informed consent
  • Gestational age prior to 15 weeks gestation

Who cannot take part

  • <18 years old or >45 years old
  • Gestational age >15 weeks
  • Non-English speaking patients, patients
  • Not willing or able to provide consent

Check if you might fit

Answer for yourself. This is not a decision: only the study team can say whether you can take part.

  • Are you between 18 and 45 years old?

Where in United States

  • Maternal Hypertension Center at Cabell Huntington HospitalHuntington, United StatesContact: Jesse Cottrell, MDTaking people

About the trial

What the trial wants to find out

The purpose of the research is to characterize the effect of labetalol, atenolol, and nifedipine on maternal hemodynamics early in pregnancy. Patients will be given medication based on their hemodynamics and asked to return for a repeat measurement.

The 2 groups in the trial

  • Beta blockade

    Beta blocker (labetalol or atenolol) will be given for a cardiac output \>8 l/min.

    Treatment: Labetalol and Atenolol

  • Nifedipine

    Nifedipine will be given for a mean arterial pressure \>100.

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

Print a page for my doctor

Data and sources

Registry record
Listed on ClinicalTrials.gov.
Official title
The Effect of Labetalol, Atenolol, and Nifedipine on Maternal Hemodynamics Measured by Impedance Cardiography in Early Pregnancy
Plain-language title
How blood pressure medicines change heart and blood flow measures in early pregnancyGenerated from the registry record. The registry title is the official one.
AI summary
From the trial's eligibility criteria. Read by machine on 12 November 2026.
Fit questions
Built from NCT04755764, who can take part
Record updated
13 May 2025