Uploaded March 2026 | Updated September 2026, 2 weeks ago

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Did you know that every electrical current creates a magnetic field? That also includes the electrical signals that control your heartbeat.

Unlike ECG, these magnetic fields travel through the body almost unchanged and can be captured with sensitive sensors.

This technique is called magnetocardiography (MCG), and it lets researchers create images of the heart’s electrical activity without direct electrode contact.

Next: how MCG helps detect heart attacks.

Learn more about how quantum technology is moving from the lab into the real world. Be sure to watch parts 3 and 4 for more!

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