Polycythaemia increases the viscosity of the blood, thus increasing the total peripheral resistance.

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Polycythaemia is a condition where there is an increase in the number of red blood cells in circulation. This increase in red blood cells leads to an increase in blood viscosity, which in turn increases the total peripheral resistance. This can put a strain on the heart and lead to various cardiovascular problems.

Polycythaemia Increases the Viscosity of the Blood, Thus Increasing the Total