There are EKG changes present in<unk>  deficiency anemia depending on the severity of the anemia.
Iron deficiency anemia electrocardiogram
Aplastic anemia electrocardiogram
Anemia of chronic disease electrocardiogram
Folate deficiency electrocardiogram
Paroxysmal nocturnal hemoglobinuria echocardiography or ultrasound
Methemoglobinemia physical examination
Thalassemia physical examination
Hemochromatosis electrocardiogram