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ECG PQRST Wave Complex

P wave (atrial depolarization), QRS (ventricular depolarization), T (repolarization) - the electrical heartbeat.

A free, animated ecg pqrst wave complex you can read here or embed on any website, from Scrollchart.

ECG PQRST Wave Complex

Annotated single cardiac cycle on ECG paper grid: P wave with atrial depolarization label, PR interval bracket, QRS complex with R peak highlighted, ST segment, T wave. Normal interval values annotated.

Good for

  • Articles in the medicine category
  • Editorial pages where a quick visual replaces a wall of text
  • Content-marketing posts that need a clean, branded illustration

Source & accuracy

This ecg pqrst wave complex 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 letter of PQRST stands for

The PQRST complex names the deflections of a single heartbeat on the ECG. The P wave is atrial depolarization. The QRS complex is ventricular depolarization, with Q the first downward deflection, R the tall upward spike, and S the downward deflection after it. The T wave is ventricular repolarization.

Atrial repolarization also occurs but is normally hidden within the much larger QRS complex.

Why the QRS dwarfs the P wave

The ventricles carry far more muscle mass than the atria, so their depolarization generates a much larger electrical signal, which is why the QRS is the tallest part of a normal trace. The brief flat segments and intervals between waves reflect conduction delays and recovery periods that allow the chambers to fill and contract in sequence.

Reading deviations in these waves is part of clinical diagnosis and should be done by a qualified professional. This is general educational information, not medical advice.

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Reference

What this is
A free, embeddable, animated ecg pqrst wave complex for any website.
Who uses it
Medical educators, Patient-info sites, Health blogs.
How to embed
Copy one line of HTML. No signup. No watermark. Works in WordPress, Webflow, Ghost, Substack, plain HTML.
File size
iframe embed, ~80 KB gzipped (loads on demand, does not block your page paint).
License
Free forever. Editorial explainer text included; updated centrally over time.
URL
scrollchart.com/diagram/ecg-pqrst

Embed format options

Copy the universal HTML snippet, the WordPress shortcode, or an iframe fallback - see the WordPress plugin page for details. Any format keeps the same Core Web Vitals profile and the same explainer text.

Embed snippet 
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By embedding, you acknowledge the diagram and explainer text are served from scrollchart.com and may be updated from time to time to reflect new research or to link to relevant sources within the explainer.

Frequently asked questions

Where can I get a free animated "ECG PQRST Wave Complex" for my website?
Scrollchart provides "ECG PQRST Wave Complex" 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.
How do I embed a ecg pqrst wave complex diagram in a health or wellness blog?
Copy the HTML snippet from the Scrollchart diagram page and paste it into any post or page in your CMS. It works in WordPress, Webflow, Ghost, Substack, and plain HTML without any plugin or account. The diagram renders as animated SVG directly in your page, so search engines can index the accompanying explainer text.
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