Wednesday, May 8, 2013

Shunts

 Shunts

response to exercise = increased stroke volume = increased pulse pressure (Sys - Dia)BP

Qp/Qs  is the ratio of Fick principle calculations for pulmonary flow and systemic flow.
Qp = VO2/(PVO2 -  PAO2)

Qs = VO2/(CaO2 - CvO2)

when algebra is done and sats are used instead of content 
Qp/Qs = (AoSat - MVSat)/(PVsat - PAsat)



Coarctation of the Aorta


Pulses are difference between systolic and diastolic.   with collateral flow through parallel circuits; e.g., intercostal arteries, MAP can be normal but pulses are weak.







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