Causes
Cardiac cause (heart failure, the most common) or non-cardiac cause (electrocution, heatstroke, near-drowning, severe reactions).
Diagnosis
Chest X-ray plus cardiac assessment. Diagnosis must be rapid.
Treatment
EMERGENCY: oxygen, diuretics to remove the fluid, and treatment of the underlying cause. Hospitalisation.
Prevention
Keep heart disease under control, avoid the non-cardiac causes (electrocution, heatstroke).

