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02/01/2009
Inside your lungs are millions of very small blood vessels called capillaries...
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Learning About PPH

Inside your lungs are millions of very small blood vessels called capillaries. Each one is about as wide as a hair, large enough for blood cells to barely pass through. The inside of the vessel is lined with endothelial cells. The outside is lined with smooth muscle cells. The endothelial cells keep blood from leaking out. The smooth muscle cells allow the capillary to get a bit narrower or wider, depending on how much blood is surging back and forth between the heart and lungs.
Learning About PPH
   
With PPH, for unknown reasons, some of the endothelial cell lining of the lung's capillaries get peeled off. As blood leaks into the smooth muscle cells they continuously constrict as a reaction. Multiplied thousands of times this chokes off the flow of blood between the heart and lungs, causing dizziness exhaustion, fainting and finally heart failure. The Spiral Effect - Click to Enlarge
 
   
With PPH, for unknown reasons, some of the endothelial cell lining of the lung's capillaries get peeled off. As blood leaks into the smooth muscle cells they continuously constrict as a reaction. Multiplied thousands of times this chokes off the flow of blood between the heart and lungs, causing dizziness exhaustion, fainting and finally heart failure. PPH Managemen Algorithm - Click to Enlarge