Clinical trial Recruiting at 3 sites Observational Ages 18 and up

Observing heart function recovery after bypass surgery with a wearable defibrillator

Official title: Prospective WCD Post CABG Registry

Run by Zoll Medical Corporation · NCT06570902 · Data updated 2026-11-12

This study is testing if using a wearable defibrillator after heart bypass surgery can help patients with weak heart function recover better than before.

Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment910 (estimated)
SponsorZoll Medical Corporation
Industry-sponsored
Locations4 sites (Bad Nauheim, Hesse and 3 other locations)
StatusRecruiting
StartedSeptember 23, 2024
Main results expectedNovember 2029
Study endsMay 2030
Registry record updatedNovember 4, 2024
Trial IDNCT06570902 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 and older who have undergone their first CABG surgery within the last 10 days and have reduced ejection fraction.

Probably not a fit

Patients with prior CABG surgery, those with active unipolar pacemakers, or those with conditions preventing proper interaction with the WCD 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 observational study aims to assess the recovery rate of ventricular function in patients with ischemic heart failure who have undergone their first coronary artery bypass graft (CABG) surgery. Participants will be monitored while using a wearable cardioverter defibrillator (WCD) post-surgery, with the expectation that the use of guideline-directed medical therapy (GDMT) will enhance recovery outcomes. The study will focus on patients with reduced ejection fraction (EF ≤35%) and will adjust recruitment to ensure 20% female enrollment. The goal is to determine if more patients achieve an EF recovery compared to previous retrospective data.

Why it matters

Potential benefit: If successful, this study could lead to improved recovery rates of heart function in patients after CABG surgery.

How similar studies have gone: Previous studies have shown a recovery rate of 54% in similar patient populations, suggesting that this approach may yield positive results.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria

* Patient underwent first-time CABG surgery \<10 days before enrollment.
* Patient is prescribed WCD for a primary reason of HF with reduced EF \< 35% measured after surgery but before hospital discharge.
* Patient is ≥18 years old

Exclusion Criteria:

* Patients having combination CABG surgery with heart valve repair.
* Patients with prior CABG.
* Patients who have an active unipolar pacemaker.
* Patients with a physical or mental condition that could impair their ability to properly interact with the WCD.

Patients currently participating in an interventional clinical study. Patients with any skin condition that would prevent wearing the device. Patients with an advanced directive prohibiting resuscitation.

Where it's running

  • Medizinische Hochschule Hannover
    Hanover, Lower Saxony, Germany
    Recruiting
  • Sana-Herzzentrum Cottbus GmbH
    Cottbus, Germany
    Recruiting
  • Universitätsklinikum Halle (Saale)
    Halle, Germany
    Recruiting
  • Kerckhoff Klinik
    Bad Nauheim, Hesse, Germany
    Not yet recruiting

Study contacts

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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.