Question

How does heart failure affect the lungs?

o Carbon dioxide enters the lungs.
Too much oxygen enters the lungs.
Blood leaves the lungs.
o Fluid can build up in the lungs.

Answer 1

Pulmonary oedema can be caused by lung disease, but when heart failure is more serious, the pressure of blood in the lungs builds-up, pushing fluid into the air sacs. This is how heart failure can lead to respiratory failure. People with pulmonary oedema will feel breathless, weak and unwell.