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Can emergency response predict heart restart? a new study investigates

NCT ID NCT07750119

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Aug 06, 2026 · Last updated Aug 07, 2026 · Updated 1 time

Summary

This study reviews records from 240 people who experienced cardiac arrest outside a hospital and were treated by an emergency medical service in Switzerland. The goal is to identify which factors, such as initial heart rhythm, response time, and whether CPR was started by a bystander, are linked to the heart starting to pump blood again on its own. No new treatment is being tested; instead, researchers are analyzing existing data to build and test predictive tools that could help emergency services improve care.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this research could help emergency services identify key factors that improve the chance of restarting a heart after cardiac arrest, potentially guiding future care protocols.
What could go wrong
This is an observational review of past records from one region, so results may not apply elsewhere. It cannot prove cause and effect, and the predictive tools need testing on new patients before use.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

240 people

The number who actually took part.

Started

Jan 2022

Finished

Dec 2025

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

People who had an out-of-hospital cardiac arrest with a resuscitation attempt in the catchment area of the emergency medical service of the Canton of Zug (Rettungsdienst Kanton Zug, RDZ), Switzerland. The service covers the Canton of Zug and adjacent parts of the cantons of Zurich, Lucerne, Aargau and Schwyz and operates a mixed model in which critical care paramedics and emergency physicians both lead resuscitation. Cases were drawn from the internal RDZ resuscitation registry as a full enumeration of all such arrests managed between 1 January 2022 and 31 December 2025 and were linked to dispatch time stamps from the Sanostat data system. Arrests of any etiology, both non-traumatic and traumatic, were included.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Out-of-hospital cardiac arrest with a resuscitation attempt, managed by the emergency medical service of the Canton of Zug during the observation period NACA score of 6 or 7 at the end of the mission * Emergency physician or critical care paramedic response as part of the mission (own service physician, REGA, Alpine Air Ambulance, or external physician response) * Any etiology, including traumatic and non-traumatic causes Exclusion Criteria: * Declaration of death without a resuscitation attempt * Documented dissent to the further use of health-related data for research * Missions without usable dispatch time stamps * Technical duplicate mission records

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Locations

  • Rettungsdienst des Kantons Zug (Emergency Medical Service of the Canton of Zug

    Zug, Canton of Zug, 6300, Switzerland

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