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.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 1800 (estimated) |
| Sponsor | University of Michigan Academic / other |
| Locations | 77 sites (Birmingham, Alabama and 76 other locations) |
| Trial ID | NCT04217551 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
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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
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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
- Principal investigator: William Meurer — University of Michigan
- Study coordinator: William Meurer
- Email: wmeurer@med.umich.edu
- Phone: 734-232-2142
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
-
Effect of cooling duration on recovery in children after cardiac arrest
This study is testing if cooling children who are in a coma after a cardiac arrest for longer periods can help them recover better.
-
Cardiac Arrest: Using Ultrasound to Find Hidden Blood Flow
This study tests whether patients who have out-of-hospital cardiac arrest but no pulse still show some blood flow on ultrasound and whether that finding relates to survival.
-
Low-dose beta-blocker treatment for adults who survived unexplained ventricular fibrillation
This trial will try low-dose beta-blockers in adults who survived an out-of-hospital cardiac arrest with no clear cause to see if it reduces dangerous heart rhythms and ICD therapies.
-
On-scene ECMO for out-of-hospital cardiac arrest in the Moravian-Silesian Region
This project will try starting ECMO (mechanical heart-lung support) on scene for adults who have a witnessed out-of-hospital cardiac arrest to see if earlier support improves outcomes.
-
ICU clinicians' early judgment of six-month recovery after out-of-hospital cardiac arrest
This project will test whether ICU doctors and nurses can, within the first 24 hours after admission, predict a patient's six-month brain recovery and quality of life after an out-of-hospital cardiac arrest.
-
Measuring S100B Protein Levels in Newborns After Intrauterine Blood Transfusions for Fetal Anemia
This study is testing if measuring a specific protein in the blood of newborns who received blood transfusions before birth can help predict the risk of brain problems later on.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.