Heart device showdown: which pacing pattern saves more lives?
NCT ID NCT07354347
First seen Jun 27, 2026 · Last updated Sep 04, 2026 · Updated 1 time
Summary
This study tests two different ways to program an implantable defibrillator (ICD) to stop dangerous fast heartbeats. About 4,000 people with heart disease who need an ICD will be assigned to one of two pacing patterns (burst or ramp) and followed for up to 10 years. The goal is to see which pattern stops the abnormal rhythm more effectively and reduces the need for a shock.
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.
- Phase
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
-
About 3,980 people
The number the study aims to enrol. It can still change while the study runs.
- Started
-
Feb 2026
- Expected to finish
-
Jul 2041
An estimate. End dates often move.
- Lead sponsor
-
Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
18 years and older
- 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 Hide 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: \- ICD implantation for primary or secondary prophylactic indication Exclusion Criteria: * None * Patients can actively opt out of participation in the study
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for Heart disease are added.
Genom att skicka in godkänner du våra Användarvillkor
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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
-
The places running it
1 site. The list below names each one and where it is.
-
The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
-
A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
-
The Heart Center, Rigshospitalet
RECRUITINGCopenhagen, Dr., 2100, Denmark
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can deeper anesthesia shield the heart during bypass surgery?
- Can we make heart procedures safer by tracking X-Ray doses?
- Can a Blood-Vessel drug shield weak hearts during surgery?
- Can a daily pill keep a rare heart disease in check for the long haul?
- Can a new heart valve offer lasting relief for pulmonary stenosis?
- Heart surgery recovery gets a wireless watchdog