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

Effects of cooling duration on recovery in cardiac arrest patients

Official title: Influence of Cooling Duration on Efficacy in Cardiac Arrest Patients - A Multicenter, Randomized, Adaptive Clinical Trial to Identify the Optimal Duration of Induced Hypothermia for Neuroprotection in Comatose Survivors of Cardiac Arrest

Run by University of Michigan · NCT04217551 · 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 if cooling patients who have survived a cardiac arrest for different lengths of time can help them recover better and improve their brain function.

More Out-Of-Hospital Cardiac Arrest trials

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment1800 (estimated)
SponsorUniversity of Michigan
Academic / other
Locations77 sites (Birmingham, Alabama and 76 other locations)
Trial IDNCT04217551 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include adults aged 18 and older who are comatose after resuscitation from out-of-hospital cardiac arrest and can be cooled within the specified time frame.

Probably not a fit

Patients with hemodynamic instability, pre-existing neurological disabilities, or those who are unlikely to survive to outcome determination 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 multicenter, randomized clinical trial investigates the impact of varying durations of induced hypothermia on neurological outcomes in comatose survivors of out-of-hospital cardiac arrest. The study aims to determine if longer cooling durations correlate with improved recovery rates and to identify the optimal cooling duration for neuroprotection. Participants will be cooled to below 34 degrees Celsius within 240 minutes of cardiac arrest, with careful monitoring and adaptive allocation of treatment based on outcomes. The trial seeks to enhance strategies for improving neurological recovery in this critical patient population.

Why it matters

Potential benefit: If successful, this study could significantly increase the rate of good neurological outcomes in patients who have suffered cardiac arrest.

How similar studies have gone: Previous studies have shown that therapeutic hypothermia can improve neurological outcomes, but this specific approach to varying cooling durations is novel and has not been extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Coma after resuscitation from out of hospital cardiac arrest
* Cooled to \<34 deg C with 240 minutes of cardiac arrest
* Definitive temperature control applied
* Age ≥ 18 years
* Informed consent from legal authorized representative (LAR) including intent to maintain life support for 96 hours
* Enrollment within 6 hours of initiation of cooling

Exclusion Criteria:

* Hemodynamic instability
* Pre-existing neurological disability or condition that confounds outcome determination
* Pre-existing terminal illness, unlikely to survive to outcome determination
* Planned early withdrawal of life support
* Presumed sepsis as etiology of arrest
* Prisoner

Where it's running

  • Banner University Medical Center
    Tucson, Arizona, United States
    Recruiting
  • Cedars-Sinai Medical Center
    Los Angeles, California, United States
    Recruiting
  • Ronald Regan UCLA Medical Center
    Los Angeles, California, United States
    Recruiting
  • UC Davis Medical Center
    Sacramento, California, United States
    Recruiting
  • UC San Diego Medical Center - Hillcrest
    San Diego, California, United States
    Recruiting
  • Zuckerberg San Francisco General Hospital
    San Francisco, California, United States
    Recruiting
Show 44 more locations
  • Stanford University Medical Center
    Stanford, California, United States
    Recruiting
  • Harbor-UCLA Medical Center
    Torrance, California, United States
    Recruiting
  • Yale New Haven Hospital
    New Haven, Connecticut, United States
    Recruiting
  • Grady Memorial Hospital
    Atlanta, Georgia, United States
    Recruiting
  • The Queen's Medical Center
    Honolulu, Hawaii, United States
    Recruiting
  • Northwestern Memorial Hospital
    Chicago, Illinois, United States
    Recruiting
  • Rush University Medical Center
    Chicago, Illinois, United States
    Recruiting
  • University of Illinois-Chicago Hosptial
    Chicago, Illinois, United States
    Recruiting
  • University of Chicago Medical Center
    Chicago, Illinois, United States
    Recruiting
  • IU Health Methodist Hospital
    Indianapolis, Indiana, United States
    Recruiting
  • University of Kansas Medical Center
    Kansas City, Kansas, United States
    Recruiting
  • University of Kentucky Hospital
    Lexington, Kentucky, United States
    Recruiting
  • Maine Medical Center
    Portland, Maine, United States
    Recruiting
  • University of Maryland Medical Center
    Baltimore, Maryland, United States
    Recruiting
  • Johns Hopkins Hospital
    Baltimore, Maryland, United States
    Recruiting
  • Brigham & Women's Hospital
    Boston, Massachusetts, United States
    Recruiting
  • University of Michigan Hospital
    Ann Arbor, Michigan, United States
    Recruiting
  • Henry Ford Macomb Hospital
    Clinton Township, Michigan, United States
    Recruiting
  • Detroit Receiving Hospital
    Detroit, Michigan, United States
    Recruiting
  • Henry Ford Hospital
    Detroit, Michigan, United States
    Recruiting
  • DMC Sinai Grace Hospital
    Detroit, Michigan, United States
    Recruiting
  • William Beaumont Hospital
    Royal Oak, Michigan, United States
    Recruiting
  • Hennepin County Medical Center
    Minneapolis, Minnesota, United States
    Recruiting
  • University of Nebraska Medical Center
    Omaha, Nebraska, United States
    Recruiting
  • Cooper University Hospital
    Camden, New Jersey, United States
    Recruiting
  • University of New Mexico
    Albuquerque, New Mexico, United States
    Recruiting
  • South Shore University Hospital
    Bay Shore, New York, United States
    Recruiting
  • Montefiore Medical Center
    Bronx, New York, United States
    Recruiting
  • NYU Langone Health - Tisch Hospital
    New York, New York, United States
    Recruiting
  • The Mount Sinai Hospital
    New York, New York, United States
    Recruiting
  • NYP Columbia University Medical Center
    New York, New York, United States
    Recruiting
  • Strong Memorial Hospital
    Rochester, New York, United States
    Recruiting
  • Stony Brook University Hospital
    Stony Brook, New York, United States
    Recruiting
  • SUNY Upstate Medical University
    Syracuse, New York, United States
    Recruiting
  • Duke University Hospital
    Durham, North Carolina, United States
    Recruiting
  • ECU Health Medical Center
    Greenville, North Carolina, United States
    Recruiting
  • Wake Forest Baptist Medical Center
    Winston-Salem, North Carolina, United States
    Recruiting
  • University of Cincinnati
    Cincinnati, Ohio, United States
    Recruiting
  • OSU East Hospital
    Columbus, Ohio, United States
    Recruiting
  • OSU Wexner Medical Center
    Columbus, Ohio, United States
    Recruiting
  • Adventist Health
    Portland, Oregon, United States
    Recruiting
  • Geisinger Medical Center
    Danville, Pennsylvania, United States
    Recruiting
  • UPMC Harrisburg
    Harrisburg, Pennsylvania, United States
    Recruiting
  • Hospital of the University of Pennsylvania
    Philadelphia, Pennsylvania, United States
    Recruiting

+27 more sites. See ClinicalTrials.gov for the full list.

Study contacts

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.
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.