Keyword Analysis & Research: squatting tof

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Why does squatting help in tetralogy of Fallot?

Why does squatting help in tetralogy of Fallot? Squatting is a compensatory mechanism, of diagnostic significance, and highly typical of infants with tetralogy of Fallot. Squatting increases peripheral vascular resistance (PVR) and thus decreases the magnitude of the right-to-left shunt across the ventricular septal defect (VSD).

What is the purpose of squatting?

Squatting serves to increase peripheral  vascular  resistance,  thereby  increasing  the  pressure  in  the  left  heart,  and subsequently forcing blood back into the pulmonary circulation.

Why does squatting increase TPR?

Squatting will increase TPR, and as a result increase pressure in the venous system, which will therefore increase venous return to the right ventricle. This will therefore increase the amount of blood going to the lungs, which will help counteract a "cyanotic spell". Can someone confirm that my reasoning is right here?

What are the benefits of sustained squatting for children?

Sustained squatting for 1-2 minutes result in steady increase in venous return, raised systemic vascular resistance. Both these effects help the children with TOF. The initial trapping of highly desaturated blood in the lower extremity gives a quick relief as soon as the child assumes this posture.

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