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CompletedNCT03817372EPICUpdated Oct 8, 2020

Electrode Positions in Cardioverting Atrial Fibrillation

An interventional study of Anterior-posterior electrode position and Anterior-lateral electrode position in Atrial Fibrillation, sponsored by University of Aarhus. Completed at 3 sites in Denmark. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2020-10-08.

Sponsored by University of Aarhus · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
468
Allocation
Randomized
Ages
18 Years and older
Sex
All
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Study summary

Atrial fibrillation is the most common heart rhythm disorder, and the incidence is rapidly increasing. Cardioversion using an electrical shock (DC-cardioversion) is an important treatment to reduce symptoms and improve patient's quality-of-life. The treatment is performed by applying gel electrodes to the chest. Cardioversion is not always successful, and it is unknown which electrode-position provides the optimal efficacy.

This study aims to compare two electrode positions, which are in clinical use: Anterior-posterior (left front and left back) versus anterior-lateral (right front and left side of the chest).

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Conditions studied

  • Atrial Fibrillation

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Keywords

  • Cardioversion
  • Electrode position
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In context

Atrial Fibrillation

3,870 studies on the registry are indexed under Atrial Fibrillation; 924 are open to participants now.

This study's enrollment of 468 is above the median of 144 across 2,380 interventional studies indexed under Atrial Fibrillation.

Browse Atrial Fibrillation studies →

Lead sponsor

University of Aarhus is the lead sponsor of 1,274 studies on the registry; 183 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  1. Atrial fibrillation (documented on an ECG-12)
  2. Able and willing to sign informed consent
  3. Age ≥ 18 years
  4. Anticoagulation according to guidelines (Patients with atrial fibrillation for >48 hours will be required to have a documented weekly international normalized ratio (INR) ≥2.0 (including within 48 hours of cardioversion) or treatment with non-vitamin K oral anticoagulant for three weeks or longer. Alternatively, a transoesophageal echocardiogram documenting the absence of intracardiac thrombi is accepted and cardioversion can be performed on treatment with low molecular weight heparin).

Exclusion criteria

Exclusion Criteria:

  1. Implanted pacemaker and/or cardioverter defibrillator (ICD)
  2. Prior enrollment in the trial
  3. Hemodynamically unstable atrial fibrillation
  4. Untreated hyperthyroidism
  5. Known or suspected pregnancy
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Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
468 participants (actual)

Study arms

  • Active comparator
    Anterior-posterior electrode position

    The anterior electrode is placed in the left parasternal area (precordium). The posterior electrode is placed in the left lower-scapular region with the electrode edge left to the spinal column.

    Device: Anterior-posterior electrode position

  • Active comparator
    Anterior-lateral electrode position

    The anterior electrode is placed in the right parasternal area below the clavicle. The lateral electrode is placed with the center of the electrode in the left mid-axillary line in level with the V6 electrocardiogram electrode.

    Device: Anterior-lateral electrode position

Interventions

  • DeviceAnterior-posterior electrode position

    Escalating energy shocks (100 J, 150 J, 200 J, 360 J) using anterior-posterior electrode position

    Also known as: LIFEPAK 20, Physio-Control/Stryker

  • DeviceAnterior-lateral electrode position

    Escalating energy shocks (100 J, 150 J, 200 J, 360 J) using anterior-lateral electrode position

    Also known as: LIFEPAK 20, Physio-Control/Stryker

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What researchers measure

Primary outcomes

  1. Efficacy: First shock success

    The primary endpoint will be first shock efficacy, i.e. the proportion of patients in sinus rhythm for at least one minute immediately after an initial shock of 100 J.

    Time frame: Immediately after first cardioversion attempt.

Secondary outcomes

  1. Efficacy: Successful cardioversion

    The secondary efficacy endpoint will be cardioversion success, i.e. the proportion of patients in sinus rhythm for at least one minute after end of protocol.

    Time frame: One minute after cardioversion

  2. Safety: Number of participants with arrhythmic events during and after cardioversion

    Secondary safety endpoints will be arrhythmia during and after cardioversion (asystole, transient bradycardia, ventricular arrhythmia, atrioventricular block, recurrence of atrial fibrillation)

    Time frame: Within 2 hours after cardioversion (until discharge)

  3. Safety: Number of participants with skin-discomfort, skin burns or itching

    Patient-reported peri-procedural discomfort when asked at discharge.

    Time frame: Two hours after cardioversion (at discharge)

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Study locations

3 sites
  • Horsens Regional Hospital
    Horsens, 8700, Denmark
  • Randers Regional Hospital
    Randers, 8930, Denmark
  • Viborg Regional Hospital
    Viborg, 8800, Denmark
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References and documents

Publications

  • Schmidt AS, Lauridsen KG, Moller DS, Christensen PD, Dodt KK, Rickers H, Lofgren B, Albertsen AE. Anterior-Lateral Versus Anterior-Posterior Electrode Position for Cardioverting Atrial Fibrillation. Circulation. 2021 Dec 21;144(25):1995-2003. doi: 10.1161/CIRCULATIONAHA.121.056301. Epub 2021 Nov 24. PubMed 34814700 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 8, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT03817372
Lead sponsor
University of Aarhus
Collaborators
Regionshospitalet Viborg, Skive, Randers Regional Hospital, Regionshospitalet Horsens
Responsible party
Sponsor
First posted
Jan 25, 2019
Start date
Feb 19, 2019
Primary completion
Oct 2, 2020
Completion
Oct 2, 2020
Last update
Oct 8, 2020

Study contacts

Anders S Schmidt, MD
principal investigator · Randers Regional Hospital
Consultant cardiologist Andi E Albertsen, MD, PhD
study director · Viborg Regional Hospital
Professor Bo Løfgren, MD, PhD, FESC, FAHA
study chair · University of Aarhus

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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