It is important to note that you could be having a heart attack without feeling discomfort in your chest, as is common in women. A sudden feeling of fatigue for no reason could be a sign that a heart attack is incoming. The heart has to work harder as arteries begin to close, and can make simple tasks feel exhausting. This can result sleeping longer hours at night or feeling like you need to take multiple naps during the day.
Polycythemia is an increased number of red blood cells in the blood. In polycythemia, the levels of hemoglobin (Hgb), hematocrit (Hct), or the red blood cell (RBC) count may be elevated when measured in the complete blood count (CBC), as compared to normal. Hemoglobin levels greater than 16.5 g/dL (grams per deciliter) in women and greater than 18.5 g/dL in men suggest polycythemia.
Polycythemia is a blood condition in which the bone marrow makes excess blood cells, primarily red blood cells, but also platelets and white blood cells.he extra cells cause a thickening of the blood, which increases the risk of blood clotting, in turn potentially causing strokes, heart attacks, and other complications. While the exact cause of polycythemia is not known, genetic changes are thought to be related to its development.