A Study to Investigate if Early Atrial Fibrillation (AF) Diagnosis Reduces Risk of Events Like Stroke in the Real-World

July 17, 2025 updated by: Janssen Scientific Affairs, LLC

HEARTLINE - A Heart Health Study Using Digital Technology to Investigate if Early AF Diagnosis Reduces the Risk of Thromboembolic Events Like Stroke IN the Real-world Environment

The primary objectives of this study are to identify and diagnose Atrial Fibrillation (AF), evaluate improvement in cardiovascular (CV) outcomes, improve direct oral anti-coagulant (DOAC) adherence and persistence, and better characterize participants and identify predictors of disease.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
34244

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • San Mateo, California, United States, 94401
        • Evidation Health

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

65 years and older (Older Adult)

Accepts Healthy Volunteers

Yes

Sampling Method

Probability Sample

Study Population

The study population includes an older age group in whom the risk of developing Atrial Fibrillation (AF) is increased and who may benefit from a broad, health-focused Engagement Program paired with the irregular rhythm notification (IRN) alert (photoplethysmogram [PPG] sensor based) and electrocardiogram (ECG) sensor of the Apple Watch Series 5 or later.

Description

Inclusion Criteria:

  • Medicare beneficiary either with Original or Medicare advantage
  • Authorize electronic access to their healthcare claims data
  • Authorize sharing of device sensor, health, and Heartline app data from their iPhone and Apple Watch (if applicable). This includes Apple Watch and iPhone sensor data that is not publicly available
  • Willing and able to provide informed consent by electronically signing the remote e-consent directly in the Heartline app prior to any study-related activities. Electronically signing the remote e-consent indicates that he/she understands the purpose of, and activities required for the study and is willing to participate for the 2-year Active Engagement Phase, with continued passive collection of their device and healthcare claims data for an additional 1 year in the Post-Engagement Follow-Up Phase
  • Current resident of the US at the time of eligibility screening, defined by self-reported state of residence within the 50 states or the US or District of Columbia
  • Own an iPhone 6s or later with iOS Version 12.2 or later

Exclusion Criteria:

  • Limited life expectancy and/or current diagnosis of terminal cancer
  • Unable to confirm meeting inclusion criteria, including ability to consent and participate in human participant's research
  • Own an Apple Watch Series 0 paired with an iPhone at the time of screening eligibility (these participants are not eligible for any study cohorts [randomized or observational])
  • Have a confirmed diagnosis of Atrial Fibrillation (AF) at study entry and currently taking a direct oral anti-coagulant (DOAC) for less than (<) 30 days, currently taking other anti-coagulant medication(s) for AF other than a DOAC, or currently not taking medication for AF

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Non- Atrial Fibrillation (AF) Cohort
Participants without a history of AF will be randomly assigned into the study to either an Apple Watch/iPhone group or an iPhone group only.
Device: Heart healthy Engagement Program with the Apple Watch Series 5 or later
No drug will be given as part of this study. Participants without a diagnosis of AF will be enrolled and a heart healthy Engagement Program delivered via the Heartline app on the iPhone with the Apple Watch Series 5 or later.
Atrial Fibrillation (AF) Cohort
Participants with a diagnosis of AF taking a direct oral anti-coagulant (DOAC) for at least 30 days will be randomly assigned to Apple Watch/iPhone group or iPhone group only.
Device: Anti-Coagulation Adherence Module with the Apple Watch Series 5 or later
No drug will be given as part of this study. Participants with a diagnosis of AF (taking a DOAC for at least 30 days) will be enrolled and an Anti-Coagulation Adherence Module delivered via the Heartline app on the iPhone with an Apple Watch Series 5 or later.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Time from Randomization to Clinical Diagnosis of Atrial Fibrillation (AF)
Time Frame: Up to 3 years
Time to a clinical diagnosis of AF obtained from healthcare claims database.
Up to 3 years
Percent Days Covered (PDC) by Direct Oral Anti-Coagulant (DOAC) Prescription Fills
Time Frame: Up to 3 years
Percent days of covered prescription DOAC use minus any evidence of no prescription use/refills over the time interval chosen.
Up to 3 years

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Time to Composite of 6-component Events (Ischemic Stroke/TIA, MI, Non-CNS Embolism or Thrombosis, Hospitalization or ED Visit for HF, CV Hospitalization and ACM)
Time Frame: Up to 3 years
Time to composite of 6-component events (ischemic stroke/transient ischemic attack [TIA], myocardial infarction [MI], non-central nervous system [CNS] embolism or thrombosis, hospitalization or emergency department [ED] visit due to heart failure [HF], cardiovascular [CV] hospitalization, and all-cause mortality [ACM]), obtained from randomization in the healthcare claims database, will be reported.
Up to 3 years
Summary of Total Cost of Care Delivery, Total Health Resource Utilization (HRU), and Cost Effectiveness
Time Frame: Up to 3 years
Summary of total cost of care delivery, total HRU, and cost effectiveness will be reported. Total costs of care reported as number of HRU events times the unit cost for each event. HRU reported as counts of HRU events. Cost effectiveness to be assessed by including the cost to diagnosis, treatment and reported clinical outcome.
Up to 3 years
Time to Ischemic stroke/TIA
Time Frame: Up to 3 years
Ischemic stroke/TIA is defined as a hospitalization/diagnosis for Ischemic stroke/TIA.
Up to 3 years
Time to MI
Time Frame: Up to 3 years
MI is defined as a hospitalization/diagnosis for MI.
Up to 3 years
Time to non-CNS Embolism or Thrombosis
Time Frame: Up to 3 years
Non-CNS embolism or thrombosis is defined as hospitalization for non-CNS thromboembolic events.
Up to 3 years
Time to Hospitalization or ED for HF
Time Frame: Up to 3 years
Hospitalization or ED visit for HF is defined as an in-patient stay or an outpatient ED visit for HF.
Up to 3 years
Time to CV Hospitalization
Time Frame: Up to 3 years
Hospitalization for CV is defined as an in-patient stay for CV disease.
Up to 3 years
Time to all-Cause Mortality
Time Frame: Up to 3 years
All-cause mortality (ACM) is defined as deaths from all (reported) causes.
Up to 3 years
Time to Composite Bleeding Events Resulting in Hospitalization
Time Frame: Up to 3 years
Hospitalization for composite bleeding events (such as intracranial hemorrhage, gastrointestinal [GI], respiratory, intraocular) is defined as in-patient stay for bleeding events, as reported in the healthcare claims database.
Up to 3 years
Time to Hospitalization for Hemorrhagic Stroke
Time Frame: Up to 3 years
Hospitalization for hemorrhagic stroke is defined as an in-patient stay for a hemorrhagic stroke.
Up to 3 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Janssen Scientific Affairs, LLC

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Apple Inc.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Janssen Scientific Affairs, LLC Clinical Trial, Janssen Scientific Affairs, LLC

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
February 25, 2020

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
January 23, 2025

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 23, 2025

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
February 18, 2020

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 18, 2020

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
February 19, 2020

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 18, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 17, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • CR108633
  • NOPRODAFL0002 (Other Identifier: Janssen Research & Development, LLC)

Drug and device information, study documents

Studies a U.S. FDA-regulated device product

Yes

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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