What does an EKG measure?
An EKG records the electrical signals that make your heart beat, showing your heart rate (how fast) and rhythm (the pattern). That rhythm trace is what can reveal irregularities such as atrial fibrillation. A simple pulse or fitness-tracker heart rate tells you speed only; an EKG shows the electrical pattern behind it.Single-lead home EKG vs. 12-lead clinical EKG
A clinical 12-lead EKG records your heart from twelve angles at once and is the standard for diagnosing many conditions, including heart attacks. A single-lead home device captures one viewpoint — enough to show rate and rhythm and to flag some irregularities, but not the full diagnostic picture. Home devices shine at catching intermittent symptoms you can then show your doctor.What a home EKG is good for
- Documenting palpitations or skipped beats when they actually happen — see heart palpitations.
- Tracking a known rhythm issue between cardiology visits.
- Screening prompts — some devices flag patterns that may suggest AFib, a cue to seek care.
What it can’t do
It can’t diagnose heart disease, confirm AFib on its own, or replace a clinician’s interpretation. Motion, poor skin contact, and dry or cold hands can also reduce trace quality. Any abnormal or worrying recording should be reviewed by a doctor.Using the EKGraph responsibly
The SonoHealth EKGraph is a personal EKG monitor designed for simple at-home recordings you can save and share with your healthcare provider. Capture a trace during symptoms, keep a log, and bring it to your appointment. See it at SonoHealth.com.Related: Atrial Fibrillation Explained · Heart Palpitations · Normal Heart Rate and Rhythm · Blood Pressure Monitoring