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Clinical trial No longer in our active list Interventional Ages 18 and up

Using ultrasound to reduce radiation during pacemaker implantation

Official title: Reduction Or Elimination Of Radiation During Implantation of Cardiac Devices Using Ultrasound (RADICAl USe)

Run by London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's · NCT04858698 · Data updated 2026-05-14

This study is no longer in our active list. It may have stopped recruiting or finished. The details below are as of 2026-05-14 and are kept for reference. Check ClinicalTrials.gov for its current status, or see similar studies below.

This study is testing whether using ultrasound instead of x-rays during pacemaker implantation can make the procedure safer for patients and doctors.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment66 (estimated)
SponsorLondon Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's
Academic / other
Drugs / interventionsradiation
Locations1 site (London, Ontario)
Trial IDNCT04858698 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are adults over 18 years old who require a single chamber pacemaker or cardioverter-defibrillator.

Probably not a fit

Patients with a BMI over 30, those who are pregnant, or individuals requiring dual-chamber or CRT devices may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study investigates the use of ultrasound as a guiding tool for the implantation of cardiac devices, specifically pacemakers, to minimize or eliminate the need for radiation. The approach aims to enhance safety for both patients and healthcare providers by utilizing a handheld ultrasound probe instead of traditional x-ray equipment. The study will assess the effectiveness of ultrasound in visualizing leads during the procedure, potentially making pacemaker implantation more accessible in smaller medical centers. By leveraging advancements in imaging technology, the study seeks to establish a safer and cost-effective method for cardiac device implantation.

Why it matters

Potential benefit: If successful, this approach could significantly reduce radiation exposure for patients and healthcare providers during pacemaker implantation.

How similar studies have gone: While there have been experimental studies using ultrasound for similar purposes, this specific approach is novel and has not been widely tested in clinical settings.

Who can join: the full rules

Show full inclusion / exclusion criteria 
Inclusion Criteria:

1. Age \>18 years old.
2. Suitable to have either a single chamber pacemaker or single chamber cardioverter-defibrillator.

Exclusion Criteria:

1. BMI \>30.
2. Pregnancy.
3. Implantation of dual-chamber and CRT devices.
4. Claustrophobia.
5. Tender chest wall or history of trauma to the chest wall.
6. Higher signal interference using ultrasound due to the presence of other medical devices or tools used in previous surgical procedures such as sternal wires, mechanical valves, breast implants.
7. History of radiation to the chest wall for oncology treatments.
8. Active malignancy

Where it's running

  • London Health Sciences Centre Res. Inc. (Ont.)
    London, Ontario, Canada     Recruiting

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
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Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.