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The electrocardiogram

Seeing the rhythm from our hearts

Each time our heart muscle cells collectively contract and relax, the electrical field around our body is altered. Here, medical student Philippa Harris explores how we record these changes with an electrocardiogram and how we use this for medical assessments

Philippa Harris

Figure 1 The electrical conduction system in the heart

AQA Mass transport in animals; Control of heart rate

OCR A Transport in animals; Hormonal communication

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Filter-feeding giants

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Killing cancers with CARs

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