DCM is a condition where the heart chambers become enlarged, which affects its ability to pump. The left ventricle of the heart becomes enlarged (dilated) and the muscle wall becomes thinner. This gives the heart a more rounded (rather than the normal cone) shape. The left ventricle becomes weaker and not able to pump as effectively as normal.

In DCM, the left ventricle becomes stretched and enlarged. The walls of the ventricle become thinner and can appear ‘baggy’. This gives the heart a rounded or spherical shape, rather than its usual ‘cone’ shape. The thinner walls are weakened, and so are not able to contract or ‘squeeze’ as normal. This makes the heart less effective at pumping blood out.

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