If anemia has developed rapidly—hypotension is secondary to loss of blood volume.

Tissue and organ hypoxia (fatigue, shortness of breath, ± pica, etc.) are seen in either chronic or acute anemia.

Pallor, hypotension, tachycardia are seen on physical examination.

Mild anemia in a young, healthy patient may not be noticed until hemoglobin <A onclick="get_content(event,'AB1-M12'); return false;" onmouseover="window.status=this.title; return true;" onmouseout="window.status=''; return true;" title="<8 g per dL.

♀: 30 of 1,000 of all ages

♂: 6 of 1,000 for younger than 45 years; 18.5 of 1,000 for older than 75 years

First, look at hemoglobin

Second, look at reticulocyte count