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CTA multiphasic study of the haemorrhagic spot in the ascendant colon of a patient with heart failure. In the arterial phase of study (a), no signs of bleeding are evident. The venous phase (b) shows a hyperdense endoluminal blush of contrast media (discontinuous arrow) that is more evident in the successive phase ((c) arrow). CT multiphasic findings are suggestive of low-flow active bleeding in a patient with heart failure: note the inferior cava vein dilatation ((c) arrowheads).
