The rhythm is either sinus rhythm or not sinus rhythm. Sinus rhythm refers to the origination of the electrical activity coming from the sinus node — also known as the sinoatrial node, or SA node.

An electrocardiogram (ECG) is a common heart health test, but a normal result doesn't guarantee a healthy heart. The electrical system is measured by ECG, but it cannot detect blockages or structural ...

An electrocardiogram, or ECG, is a standard test that records your heart’s electrical activity – offering a quick and painless way to identify irregular heart rhythms and other potential issues. But ...

Sometimes, an abnormal EKG reading is a normal variation in a person’s heart rhythm. In other cases, it may be due to an underlying heart condition or a reaction to medication. An electrocardiogram ...

Genetic testing is moving from predicting heart attacks years down the line to flagging dangerous heart rhythms before they ever appear on an electrocardiogram. Instead of waiting for symptoms, ...