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Sine Wave
(redirected from sinusoid)

   Also found in: Dictionary/thesaurus, Medical, Encyclopedia, Wikipedia 0.01 sec.
Sine Wave
Any curve plotted along an axis where the y-value moves above and below zero at a rate of y = sin(x). The Composite Index of Lagging Indicators is thought to be roughly a sine wave because interest rates and inflation, which make up the index, move in relation to each other in a way resembling the sine.


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This sign may stem from diverse pathophysiologic mechanisms, including dilated hepatic sinusoids (in heart failure), persistently high venous pressure leading to liver congestion (in chronic constrictive pericarditis), dysfunction and engorgement of hepatocytes (in hepatitis), fatty infiltration of parenchymal cells causing fibrous tissue (in cirrhosis), distention of liver cells with glycogen (in diabetes), and infiltration of amyloid (in amyloidosis).
The sinusoids become dilated and hepatocytes become necrotic when collagen accumulates in the sinusoids and venules.
The hepatic parenchyma is made of hepatocytes spread out as anastomotic cords arranged in two cellular layers surrounding the sinusoids (Figure 1B).
 
 
 
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