An interventional study of Test Algorithm and Test Device in Atrial Fibrillation (AF), Tachycardia and Bradycardia, sponsored by Zywie, Inc.. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-09-23.
Sponsored by Zywie, Inc. · Not applicable, Interventional, and Diagnostic
The purpose of this study is to demonstrate that the ZywieAI analysis algorithm can be used to analyze ECG data collected from ZywieZ3 devices with non-traditional lead placement over a 24-hour simulated use period by human subjects.
At least 150 subjects will participate in this study over a 24-hour test period. The subjects must have been diagnosed with a known condition such as Atrial Fibrillation (AF), Tachycardia, Bradycardia, Premature Ventricular Contractions (PVC/VEB), and/or Premature Atrial Contractions (PAC), etc.
A Testing Facility analyst will conduct an initial visual evaluation of the level of skin adhesion for the Test Device. The Testing Facility analyst will apply the Test device adhesive on the subject and initiate ECG data collection. Subjects will observe a 5-minute stabilization period to ensure the device is connected appropriately and has a stable input signal. Subjects will be allowed to leave the Testing Facility for the next 24 hours. During this period, subjects will follow the instructions for use provided by the Sponsor and engage in normal routine activities. After the 24-hour recording, subjects will return to the Testing Facility, and an analyst will then remove the Test Device.
Two cardiologists will review the collected ECG data from the 24-hour wear time to identify episodes of arrhythmia. A third cardiologist will be used to review the ECG data collected if the first two do not agree with their assessment. The Sponsor will download the ECG data for the Test Device from a cloud-based data repository to complete the data analysis according to the Sponsor's statistical analysis plan. The cardiologist's assessment will be compared with the analysis by the ZywieAI algorithm. A summary of the ECG statistical analysis comparing the agreement of the cardiologists will be included as an appendix to the final report for the study.
4,009 studies on the registry are indexed under Atrial Fibrillation; 961 are open to participants now.
This study's enrollment of 153 is close to the median of 150 across 2,476 interventional studies indexed under Atrial Fibrillation.
Browse Atrial Fibrillation studies →Zywie, Inc. is the lead sponsor of 2 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
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.
Exclusion Criteria:
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.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis C tests
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ECG data will be collected from subjects with previously diagnosed heart arrhythmias by a test algorithm. ECG data collected using a Test Device with non-traditional lead placement worn for a 24-hour period. The Test Algorithm analysis will be compared to assessments of the ECG data by 2 cardiologists with a 3rd cardiologist employed when there is no agreement by the 2 cardiologists.
Device: Test Algorithm and Test Device
Test Algorithm analysis of 24-hour ECG Data collected with a Test Device
Demonstration that the ZywieAI analysis algorithm can be used to analyze ECG data collected from ZywieZ3 devices with non-traditional lead placement over a 24-hour simulated use period by human subjects
Two cardiologists will review the collected ECG data from the 24-hour wear time to identify episodes of arrhythmia. A third cardiologist will be used to review the ECG data collected if the first two do not agree with their assessment. The Sponsor will download the ECG data for the Test Device from a cloud-based data repository to complete the data analysis by ZywieAI algorithm identifying cardiac anomalies. The cardiologist's assessment will be compared with the analysis by the ZywieAI.
Time frame: 24 Hours after Application of Test Device
Plan to share: No — There are no plans for publishing the data from this trial.
No publications or documents are linked to this record.
Ran from Jan 2025 to primary completion in May 2025, 3 months.
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 3 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.
This study is completed, as verified in Sep 2025. You cannot join it, but the record below documents what was studied.
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Zywie, Inc.