polycythaemia


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Related to polycythaemia: Polycythaemia vera, Secondary polycythaemia, Polycythaemia rubra vera

pol·y·cy·the·mi·a

(pol'ē-sī-thē'mē-ă)
An abnormal increase in the number of red blood cells.
Synonym(s): erythrocythemia, polycythaemia.
[poly- + G. kytos, cell, + haima, blood]

polycythaemia

An abnormal increase in the number of red blood cells as a result of increased red cell production by the bone marrow. This occurs naturally in people living at high altitudes (secondary polycythaemia) but may occur for no apparent reason (polycythaemia vera) causing flushed skin, headaches, high blood pressure (HYPERTENSION) and blurred vision. STROKE is a common complication. Treatment is by regular bloodletting (venesection) sometimes supplemented by the use of anticancer drugs or radioactive phosphorus. An American study reports that low-dose aspirin can safely prevent thrombotic complications in people with this disease. A gene for polycythaemia vera was reported in 1998.

polycythaemia

greater than normal number of red blood cells (RBC) per unit volume of blood. A compensatory mechanism in hypoxia (arising either from lung disease or in healthy people at altitude) which leads to stimulation of RBC production in the bone marrow. Improves oxygen transport, but at the expense of increasing blood viscosity, adding to the resistance to blood flow in the circulation. See also erythropoiesis.

pol·y·cy·the·mi·a

(pol'ē-sī-thē'mē-ă)
An abnormal increase in the number of red blood cells.
Synonym(s): erythrocythemia, polycythaemia.
[poly- + G. kytos, cell, + haima, blood]
References in periodicals archive ?
Haematocrit levels revealed no polycythaemia in the 238 patients.
A POLYCYTHAEMIA Vera (PV) is a very rare blood disease in which the body makes too many red blood cells.
Acquired heart post-varicella) disease Polycythaemia Moyamoya disease or Rheumatic HD syndrome Prothrombotic states Vasculitides Infective endocarditis Congenital Meningitis Prosthetic heart valves Protein S, C Childhood primary angiitis deficiency of Factor V Leiden the central nervous system mutation (cPACNS) Metabolic Takayasu's arteritis Homocysteinaemia Cervical arterial dissection Hyperlipidaemia Table V.
Retinal vein thrombosis is a complication of polycythaemia, multiple myeloma and leukaemia.
Unexplained pulmonary hypertension, right heart failure, hypercapnia or polycythaemia may be due to sleep apnoea causing nocturnal hypoxaemia or hypercapnia.
Key Words: systemic capillary leak syndrome, compartment syndrome, rhabdomyolysis, polycythaemia
Serum erythropoietin in the diagnosis of polycythaemia and after phlebotomy treatment.
There are many causes of itch so we looked for signs of anaemia, (too little blood) Polycythaemia, (too much blood) diabetes, kidney failure, liver disease, thyroid disease and some cancers, especially those affecting the lymphatic system.
It is estimated(2) that in Japan 4,000 patients suffer from ET and Polycythaemia Vera (PV), a related disorder which could be a target for treatment with AGRYLIN.
Fischer T, Kirkpatrick The Incidence of Myelofibrosis in Essential Thrombocythaemia, Polycythaemia vera and Chronic Idiopathic Myelofibrosis: A Retrospective Evaluation of Sequential Bone Marrow Biopsies.