The Heart Axis


The cardiac axis is the main direction of electrical flow. As described in the article on the ECG, the squiggly line which makes up the ECG is squiggly because the direction of electrical flow through the heart changes through the heart beat. However, the flow is predominantly in one main direction - usually from top right to bottom left, or from the sino-atrial node towards the apex (pointy end) of the heart.

The Heart Axis

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