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RecruitingNCT07018648Kardi AiUpdated Jun 12, 2025

Clinical Safety and Efficacy Testing of a Medical Device Kardi Ai, an ECG Telemetry Monitoring System

An interventional study of Medical device in Atrial Fibrillation (AF), Atrial Premature Complexes and Ventricular Premature Complexes, sponsored by KARDI AI Technologies s.r.o.. Recruiting at 2 sites in Czechia. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-06-12.

Sponsored by KARDI AI Technologies s.r.o. · Not applicable, Interventional, and Diagnostic

From the registry’s dates

  • Primary completion was expected by Aug 2025, 1 year 3 months ago, but the record still lists the study as recruiting.
  • Started May 2025; still recruiting 1 year 5 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
115
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

The goal of this clinical trial is to evaluate the safety and efficacy of medical device Kardi Ai, an ECG telemetry monitoring device in adult population.

The main questions it aims to answer are:

  • What is the sensitivity and specificity of Kardi Ai device for all monitored heart rythm disorders (combined)
  • What is the sensitivity and specificity of Kardi Ai device for each of the monitored heart rythm disorders
  • What is the quality of the ECG recordings

Participants will receive Kardi Ai medical device. They will use it to collect ECG recordings from at least 5 different days and in total collect records of at least 10 hours duration.

Read the detailed description

The primary objective of the study is to correctly find the given heart rythm disorders using Kardi Ai across all measurements compared to an experienced cardiologist.

The primary objective will be evaluated across all heart rhythm disorders together, using the statistics used in the evaluation of diagnostic tests (sensitivity, specificity, if applicable, positive predictive values and negative predictive values predictive values of the test).

Study procedure:

  1. Familiarisation of the subject with the clinical trial
  2. Signing the informed consent
  3. Handover of the Kardi Ai medical device (packaging hardware components of the Polar H10 chest strap, including instructions for use and QR codes for installation of the Kardi Ai app), registration of the subject in the physician's electronic Case Report Form.
  4. Installation and commissioning of the mobile pohone application by the subject.
  5. Independent measurement of the subject in the home environment. Measurements should be done at least 3 times per week for the duration of at least two hours each.

    As part of the ECG recording for the purpose of the clinical trial, measurements will be taken on at least five different days; and the total recording time must be at least 10 hours. If bradycardia is suspected, at least one measurement must be taken overnight for at least 6 hours.

  6. Raw data for each measurement in the Kardi Ai mobile app will be transmitted to the Kardi Ai cloud, where it will be analyzed by AI, including evaluation of the following 7 heart rhythm disorders:

    • Atrial Fibrillation
    • Supraventricular tachycardia
    • Wide-complex tachycardia
    • Increased number of supraventricular extrasystoles
    • Increased number of ventricular extrasystoles
    • Tachycardia>220 bpm
    • Bradycardia\<40 bpm
  7. KPIs calculated by AI will be automatically transmitted via API to the EDC system, where the results of each measurement will be stored in a separate form under the specific code of the subject.
  8. Individual ECG recordings will be annotated by the physician. The heart rhythm disorders found in the measurements will be recorded by the physician in the electronic Case Report Form.
  9. Once the data collection is complete, the results obtained by the AI and the results from the physician will be compared by a statistician.

    The accuracy and correctness of the ECG interpretation will be evaluated between the Kardi Ai system vs. the physician-based ECG annotation.

  10. Upon completion of the data collection, a questionnaire related to the individual satisfaction with the Kardi Ai system will be completed by each subject of the trial.
02

Conditions studied

  • Atrial Fibrillation (AF)
  • Atrial Premature Complexes
  • Ventricular Premature Complexes
  • Bradycardia
  • Tachycardia
  • Supraventricular Tachycardia
  • Wide QRS Tachycardia

Keywords

  • AI
  • heart rhythm disorders
  • ECG
  • EKG
  • atrial fibrillation
03

In context

Atrial Fibrillation

4,009 studies on the registry are indexed under Atrial Fibrillation; 961 are open to participants now.

This study's planned enrollment of 115 is below the median of 150 across 2,476 interventional studies indexed under Atrial Fibrillation.

Browse Atrial Fibrillation studies →

Lead sponsor

This is the only study on the registry with KARDI AI Technologies s.r.o. as lead sponsor.

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

04

Who can participate

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

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Age above 18 years
  • Signed /willingness to cooperate
  • Confirmed or suspected heart rhythm disorder of a cardiac rhythm disorder
  • Ability to use a smartphone and mobile app Kardi Ai
  • The subject's mobile phone meets the minimum requirements for the Kardi Ai app to work

Exclusion criteria

Exclusion Criteria:

  • Confirmed pregnancy
  • Allergic reactions to standard substances used in manufacture of clothing or other textiles
  • Superficial wound or skin irritation at the site of the chest belt attachment
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Phase
Not applicable
Primary purpose
Diagnostic
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
115 participants (estimated)

Study arms

  • Experimental
    Group with potential heart rythm disorder

    Device: Medical device

Interventions

  • DeviceMedical device

    Adding Kardi Ai medical device for detection of heart rythm disorders

06

What researchers measure

Primary outcomes

  1. Evaluation of sensitivity and specificity of Kardi Ai across all measurements and heart rythm disorders.

    Evaluation of sensitivity and specificity of Kardi Ai across all measurements and heart rythm disorders.

    Time frame: From enrollment to the end of measurements at 3 weeks

Secondary outcomes

  1. Evaluation of sensitivity and specificity of Kardi Ai across all measurements for each monitored heart rythm disorders.

    Evaluation of sensitivity and specificity of Kardi Ai across all measurements for each monitored heart rythm disorders.

    Time frame: From enrollment to the end of measurements at 3 weeks

Other outcomes

  1. Evaluation of the quality of ECG measurements

    Evaluation of the quality of ECG measurements. ECG will be evaluated by physician annotator, who will adjudicate the quality of the ECG on the three point scale. 1 - excellent(above 90% QRS recognizable), 2- medium(above 70% QRS recognizable), 3 - poor(less than 70% QRS recognizable).

    Time frame: From enrollment to the end of measurements at 3 weeks

07

Study locations

2 of 2 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started May 2025 (actual). Primary completion is estimated for Aug 2025, 2 months after the start.

Of 255 industry-sponsored interventional studies with no phase under Atrial Fibrillation, half reached primary completion within 22 months of starting (the median), counting those still running; a quarter within 12 and three quarters within 36. This study's planned 2 months is below that.

Counting every sponsor, half of 1,051 studies reached it within 33 months; a quarter within 18 and three quarters within 54.

How these figures are worked out, and which studies are left out of them.

Registered
May 17, 2025
First posted
Jun 12, 2025
StartActual
May 19, 2025
Primary completionEst.
Aug 1, 2025
CompletionEst.
Aug 30, 2025
Last update
Jun 12, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jun 12, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT07018648
Lead sponsor
KARDI AI Technologies s.r.o.
Collaborators
Fakultní nemocnice Olomouc, University Hospital Ostrava
Responsible party
Sponsor
First posted
Jun 12, 2025
Start date
May 19, 2025
Primary completion
Aug 1, 2025 (estimated)
Completion
Aug 30, 2025 (estimated)
Last update
Jun 12, 2025

Study contacts

David Skála
Contact
david@kardi.ai
+420 779 998 100
Jiří Plášek, doc. MUDr. PhD. FESC
principal investigator · University Hospital Ostrava

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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