AI system
- Model
-
Samsung’s ECG classifier for atrial fibrillation. Samsung does not give a separate model name. [1] [2]
- Role
-
Not assessed
- Configuration
-
Samsung Health Monitor ran on a Galaxy Watch4 Classic. Holycross took an ECG after his wife noticed a possible problem. [1] [2]
- Inputs and outputs
-
Not assessed
- Autonomy
-
Not assessed
- Workflow
-
A Galaxy Watch with the ECG feature enabled through Samsung Health Monitor on a paired Galaxy phone. A symptomatic user prompted to record an ECG. An ER able to confirm the rhythm on a 12-lead ECG.
- Human oversight
-
Not assessed
- Relation to AI
-
The watch classified a user-initiated 30-second ECG as atrial fibrillation. Holycross says that he would not have gone to the ER without that result and that an ER doctor confirmed the rhythm. The recording was prompted by his wife's observation, not by a passive irregular-rhythm notification. CyberGuy's original interview records the couple's account. No clinical document or independent clinical verification is cited. Samsung's instructions distinguish the ECG app from its compatible watch hardware. The interview does not disclose the installed app, operating-system, or classifier version. [1]
- AI contribution
-
The watch classified a 30-second ECG as atrial fibrillation after the patient’s wife prompted him to take a reading. He said that an emergency physician confirmed the rhythm. The original interview provides their testimony without clinical records. [1]
Benefits
- Outcome identifiers
-
Not assessed
- Benefit
-
open-heart surgery followed ten days later
- Category
-
Improved Physical Health
- Status
-
Not assessed
- Beneficiary groups
-
People.
- Beneficiaries
-
Not assessed
- Reach
-
Not assessed
- Distribution and access
-
Not assessed
- Duration
-
Not assessed
- Expected?
-
Yes
- Costs and harms
-
Not assessed
Measurement
- Studies
-
Not assessed
- Study design
-
Not assessed
- Measurement
-
Not assessed
- Setting and sample
-
Not assessed
- Measures
-
open-heart surgery followed ten days later
- Comparison
-
Assumed alternative: no watch ECG reading (Joseph's and his doctors' counterfactual)
- Results
-
Assumed comparison. Reference: He probably would have had a stroke, heart attack, or both. Result: He says an ER doctor reviewed the tracing and confirmed that he was in AFib.
- Additional value from AI
-
Not assessed
- Limitations
-
Not assessed
- Denominators
-
Not assessed
- Materials for replication
-
Not assessed
Money
- Kind of value
-
Not assessed
- Amount
-
Not assessed
- Currency and prices
-
Not assessed
- Period and unit
-
Not assessed
- Realization
-
Not assessed
- Recipients and payers
-
Not assessed
- Gross or net
-
Not assessed
- Included costs
-
Not assessed
- Comparison
-
Not assessed
- Method
-
Not assessed
- Return and payback
-
Not assessed
People and places
- Participants
-
Developer:
Samsung Electronics. - Jurisdictions
-
Benefit: Not stated in the read reports. Developer:
South Korea. - Ownership and control
-
Not assessed
- Dependencies
-
Not assessed
- Cross-border connections
-
Not assessed
- Geopolitical implications
-
Not assessed
Follow-up
- Conditions for replication
-
The single-lead classifier returns AFib rather than inconclusive or poor recording. The user acts on the result instead of dismissing it.
- Replication attempts
-
Not assessed
- Later findings
-
The original interview says that Holycross uses the watch to track walking during recovery. No separately reported later outcome is cited. [1]
- Availability
-
Not assessed
- Institutional decision
-
Not assessed
- Grounds
-
Not assessed
- Action and result
-
Not assessed
- Success criterion
-
Not assessed
Evidence
- Source numbers
-
AIBD-0303-source-0001–0002
- Citations
-
Numbered references below. [1]
- Language
-
Not assessed
- Source relationships
-
Independent, Developer [1]
- Original evidence
-
CyberGuy interviewed Holycross and his wife. Samsung’s instructions explain the ECG app and compatible watches. Neither supplies a clinical record for Holycross or identifies his installed software release. [1] [2]
- Access and versions
-
Samsung’s June 2023 instructions are available. Revision 4.0 identifies the document. The compatibility table on page 4 lists ECG app versions 1.1 and 1.2, without establishing which version Holycross used. [2]
- Supported findings
-
Not assessed
- Evidence links
-
Not assessed
- Evidence strength
-
Not assessed
- Missing evidence
-
Not assessed
Grades
- Assessed benefits
-
People.
- Depth
-
People: 3.
- Reasons
-
People: ER confirmation of AFib, a week of inpatient work-up and open-heart surgery followed the result. The stroke-or-heart-attack counterfactual is the family's report of doctors' warnings in a single news feature.
- Observed or intended
-
Not assessed
- Rubric
-
Not assessed
- Assessor and date
-
Not assessed
- Alternative assessments
-
Not assessed
Entry details
- Kind
-
Not assessed
- Related entries
-
Not assessed
- Field
-
Healthcare (cardiology). Consumer wearables.
- Purpose
-
The Samsung Health Monitor ECG feature is built to record a 30-second single-lead ECG and classify it. It flags a possible AFib result so the user contacts a doctor. This result was that purpose.
- Dates
-
Source published: 1 October 2026. Updated: 24 October 2026.
- Stage
-
Not assessed
- Version
-
SHA-256: ca726c54b393…
References
- Other identifiers
-
Not assessed
- Category mappings
-
Not assessed
- Brief
-
Not assessed
- Revisions
-
15 revisions. Latest: 24 October 2026.
Sources
-
News report Independent author
Knutsson K (2026). Smartwatch AFib alert sends dad to ER before heart surgery. CyberGuy, 1 October 2026.
Original interview with Joseph and Jamie Holycross. Their account is not clinical verification.
It came up and told me immediately at the top in bold letters, atrial fibrillation
-
Other Developer
Samsung Electronics. Samsung ECG Monitor App with Irregular Heart Rhythm Notification: US Instructions for Use. June 2023, document revision 4.0, pp. 2, 4–5. Page 4 distinguishes ECG app versions 1.1 and 1.2 from compatible Galaxy Watch4 hardware.
pp. 2, 4–5; especially the Getting started table on p. 4
Original manufacturer instructions establish the app identity, recording mode, and multiple compatible software versions. They do not verify Holycross's health outcome or installed release.