Medical glossary
ECG (Electrocardiogram)
A tracing of the heart's electrical activity.
Definition
An ECG records voltage changes across the body surface caused by heart muscle contraction. It's fast, painless, and the first-line test for chest pain, palpitations, and suspected arrhythmia. Outputs the familiar P-QRS-T pattern.
See also
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Glossary entries are general reference, not medical advice for any specific person.