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ECG Waves: P-QRS-T

P (atrial depolarization), QRS (ventricular depolarization), T (ventricular repolarization).

A free, animated ecg waves: p-qrs-t you can read here or embed on any website, from Scrollchart.

ECG Waves: P-QRS-T

ECG Waves: P-QRS-TNormal sinus rhythm: electrical events of one cardiac cycle with interval reference rangesNormal values

Available in: Italiano日本語

A normal sinus rhythm with each wave aligned to its electrical event in the heart cross-section. Intervals (PR, QRS, QT) labeled with normal ranges.

Good for

  • Cardiology and ECG interpretation teaching aids
  • Patient education on heart rhythm monitoring
  • Medical board review and preclinical physiology resources

Source & accuracy

This ecg waves: p-qrs-t is an editorial illustration built to represent the concept accurately. Where it shows figures, they are typical or representative values chosen to make the relationship clear, not a single underlying dataset. The diagram and its explainer are reviewed and maintained centrally, and updated over time as understanding improves.

What each ECG wave represents

A standard electrocardiogram (ECG or EKG) records the heart's electrical activity as a repeating pattern of waves labeled P, QRS, and T. The P wave represents atrial depolarization, the electrical activation that triggers the atria to contract. The QRS complex represents ventricular depolarization, which activates the much larger ventricular muscle and is the tallest deflection on the trace. The T wave represents ventricular repolarization, the electrical recovery of the ventricles.

Atrial repolarization also occurs but is normally hidden within the larger QRS complex, which is why a distinct wave for it is not usually seen.

Reading the intervals between waves

The spacing between waves carries clinical meaning. The PR interval reflects conduction time from the atria through the atrioventricular node to the ventricles. The QRS duration reflects how quickly the ventricles depolarize, and a widened QRS can indicate a conduction problem. The QT interval spans ventricular depolarization and repolarization together.

Clinicians interpret wave shapes, durations, and intervals across multiple leads to assess rhythm and conduction. ECG interpretation is a medical task, and abnormal findings require evaluation by a qualified healthcare professional.

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Reference

What this is
A free, embeddable, animated ecg waves: p-qrs-t for any website.
Who uses it
Medical educators, Patient-info sites, Biology educators.
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Copy one line of HTML. No signup. No watermark. Works in WordPress, Webflow, Ghost, Substack, plain HTML.
File size
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License
Free forever. Editorial explainer text included; updated centrally over time.
URL
scrollchart.com/diagram/ecg-waves-pqrst

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Frequently asked questions

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Scrollchart provides "ECG Waves: P-QRS-T" as a free, embeddable animated diagram you can add to any website with one line of HTML. No signup is required and there is no watermark. The diagram and its explainer text are served from scrollchart.com, so the embed stays current without any maintenance on your end.
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