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A personal EKG can be genuinely useful for documenting heart symptoms that come and go — but only if you understand what these devices do and pick one that fits how you’ll use it. This guide covers the decisions that matter.
A personal EKG cannot rule out a heart attack. If you have chest pain, pressure, fainting, or severe shortness of breath, call 911 — do not stop to record a trace.

What can a personal EKG actually do?

A home device records a single-lead electrocardiogram — your heart’s rate and rhythm from one viewpoint. That’s enough to document palpitations and flag some irregularities like atrial fibrillation, but it is not the twelve-angle picture a clinical EKG provides. Its superpower is catching intermittent symptoms you can then show your doctor — see single-lead vs. 12-lead.

Which features matter when buying one?

Look for a device that captures a clean trace quickly (around 30 seconds), stores recordings, and can export or share them — ideally as a PDF for your doctor. Ease of use matters because you’ll often record one-handed during a symptom. Simple, reliable recording beats extra bells and whistles.

Is a dedicated EKG better than a smartwatch?

A purpose-built single-lead EKG records the heart’s actual electrical trace, which is generally more informative for rhythm than a smartwatch’s optical pulse sensor — though some smartwatches now include their own EKG feature. If documenting palpitations clearly is your goal, a dedicated device that exports a clean trace is a strong choice. Neither replaces a clinician. See personal EKG vs. smartwatch.

How do I get good recordings?

Sit still, rest your hands, keep them warm and dry, and don’t talk during the recording. A noisy or “unclassified” trace usually just means a poor signal — wait a moment and try again. Our how to take a good reading guide has the details.

How SonoHealth fits

SonoHealth’s EKGraph is a personal EKG monitor designed for simple at-home recordings you can save and share with your provider. Capture a trace during symptoms, keep a dated log, and bring it to your appointment. See it at SonoHealth.com.
Related: Home EKG Monitoring · Single-Lead vs. 12-Lead · Personal EKG vs. Smartwatch · How to Take a Good EKG Reading