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Guide · Heart Check

What a smartwatch EKG can — and can't — tell you

The short answer

A smartwatch EKG is a single-lead rhythm recording. It can flag rhythm irregularities — the reason most people get an alert — but it cannot rule out or diagnose a heart attack, and a clean strip doesn't guarantee a healthy heart. The right response to an alert is clinician review, not panic or dismissal.

Single-lead vs. the real thing

A clinical EKG uses 12 leads looking at the heart from many angles; your watch uses one. One lead is genuinely useful for rhythm — rate, regularity, patterns consistent with atrial fibrillation — and genuinely blind to most structural and blood-flow problems.

What an alert actually means

An irregular-rhythm alert is a prompt for a conversation, not a diagnosis. Context decides everything: symptoms, history, medications, and how often it happens. That's clinician work — GetSeenMD's Heart Check lets you send up to six strips per visit to a clinician with a decade of cardiac-care experience.

When to skip telehealth entirely

Chest pain or pressure, fainting, severe shortness of breath, stroke signs — call 911. No watch, and no telehealth visit, is the right tool for an emergency.

Teresa Slater, CRNP
Reviewed by Teresa Slater, CRNPBoard-certified nurse practitioner · a decade in cardiac care · the same clinician at every visit
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Questions on this topic

Can my watch detect a heart attack?
No. Heart attacks are a blood-flow problem a single-lead strip can't see. Symptoms decide: chest pain means 911, not an app.
My watch says AFib — is that certain?
No — false positives happen, especially with movement. It's a strong reason for clinician review of the actual strips, which is what a Heart Check visit does.
Which devices work with Heart Check?
Most consumer devices that export a strip as a PDF or image — Apple Watch, Samsung, Fitbit, KardiaMobile among them.

More answers in the full FAQ →

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