Human Phenotype Ontology entry HP_0003565 (Elevated erythrocyte sedimentation rate) can be described as follows. An increased erythrocyte sedimentation rate (ESR). The ESR is a test that measures the distance that erythrocytes have fallen after one hour in a vertical column of anticoagulated blood under the influence of gravity. The ESR is a nonspecific finding. An elevation may indicate inflammation or may be caused by any condition that elevates fibrinogen. Also known as: Elevated ESR, Elevated sedimentation rate, High ESR, High erythrocyte sedimentation rate, Increased erythrocyte sedimentation rate, Raised erythrocyte sedimentation rate.