Judging from the results, it is indeed small cell anemia, and the possibility of iron deficiency should be great, but routine examination of fecal occult blood is needed to rule out the possibility of intestinal blood loss. In addition, menorrhagia in women is the most common cause.

Anemia can cause heart symptoms, but the diagnosis of anemia cardiomyopathy needs stricter indicators. And there is no such diagnosis as iron deficiency heart disease. After most patients corrected anemia, their heart symptoms naturally improved.

(Dr. Duan Minghui solemnly reminds me that because I can't see the patient face to face, I can't fully understand the condition. The above suggestions are for reference only. Please go to the hospital for specific diagnosis and treatment under the guidance of a doctor! )

Duan Minghui of Peking Union Medical College Hospital/