What is the pathophysiology aft clubbing of fingers within a child near congenital heart disease?
Answers:
clubbing is a result of the child's lack of O2 to the ends of the at a tangent system. The child does not have sufficient oxygen carrried contained by the blood and the toes and fingers can "club" in the process. The physiological process is a thicking within the area to protect the already fragile capillary and their low oxygen levels.
The deficit of O2 to the distal extremities was the adjectives theory surrounded by the past (the conception being the elaboration of things approaching VEGF in the distal extremities). Now the hot proposition is that it's caused by the performance of platelet clumps and megakaryocytes that get lodged contained by the distal capillary beds. The notion is that normally, circulating platelet clumps and megakaryocytes take lodged in and broken up surrounded by the pulmonary vasculature. In congenital heart defects that include a right-to-left shunt, these can bypass the lungs and remain surrounded by circulation. When they get lodged surrounded by the distal capillary beds they release platelet derived growth factor (PDGF) which stimulates collagen production around the capillary. The theory is also valid for bacterial endocarditis contained by which platelet clumps can come off from the valvular vegetations (or other thrombogenic foci close to aneurysmal plaques).
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