Backup: Failure of either heart is akin to an accident on the highway. The traffic will backup on the road segments ahead of the accident. In left heart failure, the lungs are the segment of "road" immediately preceding the failed heart. In right heart failure, the liver is immediately upstream, and the lungs are in fact downstream.
Answered 12/21/2013
5.5k views
Not the only: Pul edema is fluid in the lungs due to a shift of fluid from the veins and capillaries to the sorroundings lung tissues.. This can happen when the pressure in the veins rises as in left heart failure or when the veins become leaky because of infection,inflammation toxic chemicals and drugs,etc. The other conditions include high altitude,sudden chest decompression,drowning.
Answered 5/8/2021
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