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ArrhythmiaHELP-ANCT06250712

Hativ® ELectrocardiogram Monitoring on Patients With Suspected Arrhythmia

A study testing Memo Patch continuous ECG and Hativ handheld ECG in people with Arrhythmia, run by Wonju Severance Christian Hospital at 4 sites in South Korea.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

HELP-A is a prospective, randomized, open-label, multicenter comparative-effectiveness trial comparing two ambulatory electrocardiographic monitoring strategies in adults with palpitations or dizziness and a nondiagnostic 12-lead ECG. Read more about this study

Who is it for?
Ages 19 years and older
Conditions the study is for
Arrhythmia
What is being tested?
Memo Patch continuous ECG and Hativ handheld ECG
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
588 participants
Where
4 sitesSouth Korea
Study dates
22 Feb 2024to 30 Jun 2027
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 19 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age 19 years or older.
  • Palpitations or dizziness not explained by the presenting 12-lead ECG.
  • A clinical indication for additional ambulatory ECG monitoring.
  • Ownership of and ability to use a compatible smartphone.
  • Ability to provide written informed consent and comply with study procedures

Who cannot join

  • Physical disability or another condition that prevents appropriate use of the handheld ECG device.
  • Presence of a cardiac implantable electronic device or ventricular assist device.
  • Inability to read or understand the informed consent document.
  • Any other condition that, in the investigator's judgment, makes participation in the study inappropriate.

Trial locations and contacts

4 sites in 1 country. Contact the study team or a site near you to ask about taking part.

South Korea4 sites, 4 recruiting
  • Chonnam National University Hospital

    Gwangju, Dong-gu Jaebongro 42, 61469

    Ki hong Lee, MD, 82 01-9962-5830, drgood2@naver.com

    Recruiting
  • Hallym University Dongtan Sacred Heart Hospital

    Gyeonggi-do, Hwaseong-si Keunjaebong-gil 7, 18450

    Seong Woo Han Professor, MD, 82 01-2630-6489, hansw29@hallym.or.kr

    Recruiting
  • Korea University Anam Hospital

    Seoul, Seongbuk-gu, 73 Goryeodae-ro, 02841

    Young Jun Park, 82-2-920-5445, yjparkcardio@gmail.com

    Recruiting
  • Wonju Severance Christian Hospital

    Wŏnju, Gangwon-do, 26426

    Min-Soo Ahn, heartsaver@yonsei.ac.kr

    Recruiting

Other trials in South Korea

About this study

HELP-A is a prospective, randomized, open-label, multicenter comparative-effectiveness trial comparing two ambulatory electrocardiographic monitoring strategies in adults with palpitations or dizziness and a nondiagnostic 12-lead ECG. A total of 588 participants are randomized 1:1 to 30-day intermittent handheld 6-lead ECG monitoring (Hativ) or up to 7 days of continuous single-lead patch ECG monitoring (Memo Patch). The primary endpoint is clinically informative symptom-rhythm correlation established with the initially assigned device by the 1-month follow-up visit. Participants without a symptom-rhythm correlation who remain symptomatic may undergo optional sequential monitoring with the alternative device after primary endpoint ascertainment. Clinical outcomes, arrhythmia-directed interventions, healthcare resource utilization, costs, and adverse events are assessed through 3 months.

Read the detailed description

HELP-A is an investigator-initiated, prospective, randomized, open-label, multicenter comparative-effectiveness trial conducted at four tertiary hospitals in South Korea. The study evaluates two ambulatory ECG monitoring strategies in adults with palpitations or dizziness that are not explained by a presenting 12-lead ECG and for whom additional ambulatory rhythm monitoring is clinically indicated.

Participants are randomized in a 1:1 ratio, stratified by participating center, to one of two monitoring strategies. Participants assigned to Hativ use a handheld ECG device that provides 10-second 6-lead ECG recordings. They are instructed to record at least twice daily and whenever symptoms occur for 30 days. Participants assigned to Memo Patch undergo continuous single-lead ECG monitoring for up to 7 consecutive days and report symptom onset using a mobile messaging chatbot or paper diary. For each reported symptom, a 20-minute ECG segment from 10 minutes before to 10 minutes after the reported onset is available for review.

The primary endpoint is clinically informative symptom-rhythm correlation established with the initially assigned device by the 1-month follow-up visit. A positive correlation requires an interpretable ECG obtained during a participant-confirmed typical symptomatic episode with a rhythm finding judged to be temporally and clinically concordant with that episode. A negative-only correlation requires at least one qualifying symptomatic episode with an interpretable ECG showing no concordant rhythm finding and no positive correlation by the 1-month visit. Both positive and negative-only correlations count as primary-endpoint success.

Because the assigned monitoring durations differ, a prespecified key secondary analysis re-ascertains the primary endpoint using only data from the first 7 days after randomization, representing the common planned 7-day monitoring window. Clinically significant arrhythmia is evaluated separately from symptom-rhythm correlation and is adjudicated centrally using prespecified device-specific operational definitions.

After completion of the 1-month primary endpoint assessment, participants with persistent symptoms and no clinically informative symptom-rhythm correlation may undergo optional sequential monitoring with the alternative device if further monitoring remains clinically appropriate and the participant agrees. Data obtained during sequential monitoring do not contribute to the primary randomized comparison and are analyzed as exploratory outcomes.

All randomized participants are followed through 3 months. Follow-up includes arrhythmia-directed therapeutic interventions, clinical events, healthcare resource utilization and costs, adverse events, and selected patient-reported outcomes.

Conditions
Arrhythmia
Being tested
Memo Patch continuous ECG, Hativ handheld ECG
Keywords
Palpitation, Dizziness, Arrhythmia
Medical subject headings
Arrhythmias, Cardiac, Dizziness

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Memo Patch continuous ECGDevice

    Continuous single-lead ECG monitoring for up to 7 consecutive days. Participants report the onset of symptoms using a mobile messaging chatbot or paper diary. For each reported symptomatic episode, a 20-minute ECG segment extending from 10 minutes before to 10 minutes after the reported onset is available for review.

  • Hativ handheld ECGDevice

    Handheld ECG monitoring using 10-second 6-lead recordings obtained at least twice daily and additionally whenever symptoms occur for 30 days. Recordings are transmitted through the companion smartphone application to a secure study server.

Study groups in NCT06250712
Study groupRoleWhat they receive
Memo Patch continuous ECG strategyExperimentalParticipants undergo continuous single-lead ECG monitoring with Memo Patch for up to 7 consecutive days and report symptom onset using a mobile messaging chatbot or paper diary.
Receives: Device: Memo Patch continuous ECG
Hativ handheld ECG strategyActive comparatorParticipants use Hativ for 30 days and perform 10-second 6-lead ECG recordings at least twice daily and whenever symptoms occur.
Receives: Device: Hativ handheld ECG

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Clinically informative symptom-rhythm correlation with the initially assigned device by 1 month

    Proportion of randomized participants with at least one participant-confirmed typical symptomatic episode documented with an interpretable ECG using the initially assigned device by the 1-month follow-up visit and before optional sequential monitoring. Primary-endpoint success comprises either a positive symptom-rhythm correlation or a negative-only symptom-rhythm correlation. A positive correlation is a qualifying symptomatic episode with an interpretable ECG showing a rhythm finding judged by central adjudication to be temporally and clinically concordant with that episode. A negative-only correlation requires at least one qualifying symptomatic episode with an interpretable ECG showing no concordant rhythm finding and no positive correlation by the 1-month visit.

    Measured: From randomization through the 1-month follow-up visit

Secondary outcomes (9)
  1. Positive symptom-rhythm correlation

    Proportion of participants with at least one qualifying participant-confirmed typical symptomatic episode documented with an interpretable ECG showing a rhythm finding judged by central adjudication to be temporally and clinically concordant with that episode.

    Measured: By the 1-month follow-up visit

  2. Negative-only symptom-rhythm correlation

    Proportion of participants with at least one qualifying participant-confirmed typical symptomatic episode documented with an interpretable ECG showing no temporally and clinically concordant rhythm finding and with no positive correlation by the 1-month follow-up visit.

    Measured: By the 1-month follow-up visit

  3. Both positive and negative episodes

    Proportion of participants with at least one qualifying positive symptom-rhythm correlation and at least one qualifying negative symptom-rhythm correlation. This measure is descriptive.

    Measured: By the 1-month follow-up visit

  4. Clinically significant arrhythmia detected during assigned-device monitoring

    Proportion of participants with at least one centrally adjudicated clinically significant arrhythmia detected during initially assigned-device monitoring, irrespective of symptom association. Clinically significant arrhythmias are classified using prespecified device-specific operational definitions. Findings are additionally classified as symptom-associated or not temporally associated with a qualifying typical symptomatic episode.

    Measured: By the 1-month follow-up visit

  5. Arrhythmia-directed therapeutic intervention

    Rate and timing of arrhythmia-directed therapeutic interventions, including medication, catheter ablation, or cardiac device implantation.

    Measured: Through 3 months after randomization

  6. Overall satisfaction

    Overall satisfaction with the initially assigned device is assessed using the Study-Specific Overall Device Satisfaction Rating, a single-item, five-point ordinal scale in the 1-month participant questionnaire. Responses are scored as 1 = very dissatisfied, 2 = dissatisfied, 3 = neither satisfied nor dissatisfied, 4 = satisfied, and 5 = very satisfied. The minimum possible score is 1 and the maximum is 5, with higher scores indicating greater satisfaction, a more favorable outcome. The item is assessed separately from device-specific usability questions and willingness to recommend the device.

    Measured: 1-month follow-up visit

  7. EQ-5D-5L

    Change in the EQ-5D-5L index score from enrollment to the 1-month follow-up visit.

    Measured: Baseline to 1 month

  8. Healthcare resource utilization and costs

    Arrhythmia-related healthcare resource use through 3 months, including additional diagnostic tests, arrhythmia-related medications, emergency department visits, and hospitalizations. Costs are derived from institutional billing records at participating centers and expressed in Korean won. The base-case analysis excludes acquisition cost of the study devices because the devices were supplied in kind.

    Measured: Through 3 months after randomization

  9. Number and Percentage of Participants With Device-Related Adverse Events or Serious Adverse Events

    Number and percentage of participants who experience at least one device-related adverse event or at least one serious adverse event through 3 months after randomization. Expected device-related adverse events include skin irritation or contact dermatitis associated with the adhesive patch and discomfort associated with device use. Serious adverse events are included regardless of their relationship to the study device. Each participant is counted once for this outcome, irrespective of the number of qualifying events experienced

    Measured: Through 3 months after randomization

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted9 Feb 2024
  2. Study start22 Feb 2024
  3. Primary completion30 Jun 2027 (estimated)
  4. Study completion30 Jun 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Diagnosis
Allocation
Randomised
Intervention model
Parallel groups
Model description
Two-group parallel randomized comparative-effectiveness trial. Optional sequential monitoring with the alternative device may occur only after ascertainment of the 1-month primary endpoint and is not part of the primary randomized comparison.
Masking
None (open label)
Enrolment
588 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06250712
Sponsor's protocol ID
CR223024
Acronym
HELP-A
Status last verified
Sep 2026
First submitted
31 Jan 2024
Last updated
5 Oct 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: De-identified individual participant data underlying the primary publication, together with a data dictionary, will be available from the corresponding investigator on reasonable request after completion of the study and publication of the primary results, subject to ethics approval and execution of an appropriate data-use agreement.

Publications

  • Raviele A, Giada F, Bergfeldt L, Blanc JJ, Blomstrom-Lundqvist C, Mont L, Morgan JM, Raatikainen MJ, Steinbeck G, Viskin S, Kirchhof P, Braunschweig F, Borggrefe M, Hocini M, Della Bella P, Shah DC; European Heart Rhythm Association. Management of patients with palpitations: a position paper from the European Heart Rhythm Association. Europace. 2011 Jul;13(7):920-34. doi: 10.1093/europace/eur130. No abstract available.

    PubMed 21697315
  • Turnbull S, Garikapati K, Bennett RG, Campbell TG, Kotake Y, Mahajan R, Marschner S, Byth K, Chow CK, Kumar S. Utility of a Handheld, Single-Lead ECG Device for Diagnosis of Cardiac Arrhythmias. J Am Coll Cardiol. 2023 Jun 13;81(23):2292-2294. doi: 10.1016/j.jacc.2023.03.428. No abstract available.

    PubMed 37286259
  • Schreiber D, Sattar A, Drigalla D, Higgins S. Ambulatory cardiac monitoring for discharged emergency department patients with possible cardiac arrhythmias. West J Emerg Med. 2014 Mar;15(2):194-8. doi: 10.5811/westjem.2013.11.18973.

    PubMed 24672611

Questions about this trial

What is this clinical trial studying?

A study testing Memo Patch continuous ECG and Hativ handheld ECG in people with Arrhythmia, run by Wonju Severance Christian Hospital at 4 sites in South Korea.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 5 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 4 sites in South Korea. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Young Park, MD (82-2-920-5445, yjparkcardio@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Clinically informative symptom-rhythm correlation with the initially assigned device by 1 month (time frame: From randomization through the 1-month follow-up visit). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06250712, which also lists 3 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 Oct 2026.

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