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Polycythaemia is the high concentration of red blood cells in the blood. This is caused by the over-stimulation of red blood cell production or a relative increase in red blood cells in the circulating blood. The haematocrit value can be up to 60-80%, increasing the blood's viscosity. There will be extra load upon the heart and it may lead to heart hypertrophies.

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7y ago
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12y ago

an abnormally increased concentration of hemoglobin in the blood

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16y ago

An irregularly high red blood cell count.

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Q: What is polychythemia?
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