Complications of dangerously low hemoglobin level
If hemoglobin falls low enough, the body won’t be able to function with such low oxygen delivery, which will lead to it pushing the heart too hard to pump more blood. This, however, comes with a downside, since the heart fills in between heartbeats. When it beats fast enough, it can no longer fill with blood leading to heart failure and death.
Chronically low hemoglobin in children can also delay their growth and development and is considered a common cause of stunted growth in many developing countries. Constriction of blood vessels can also leave those tissues susceptible to infections leading to their death in severe cases “gangrene”.