Peds CV exam 2 Flashcards
What influences shunting in ASDs/PFO
ventricular compliance
AV valve function
What influences shunts in VSDs/PDAs
Pulmonary vascular resistance
Systemic vascular resistance
What are the consequences of a low PVR with a left to right shunt
- volume overload of lungs
- increased workload for LV maintaining cardiac output
What are some defects that are associated with a right to left shunt (4)
Truncus
Transposition
TOF
HLHS
What are the hemodynamic goals of a patient with a right to left shunt
- Avoid decrease in SVR
- Decrease PVR
- increase FiO2
- hyperventilate
oxygen pulmonary vasodilator
CO2 causes pulmonary vasoconstriction
What effect does a right to left shunt have on an inhaled induction
prolonged
R -> L shunt will ____ the speed on an IV induction
increase
emboli are a serious concern with what shunt physiology
right to left
Hemodynamic goals of a left to right shunt
- Avoid increase in SVR
- avoid decrease in PVR
- use low FiO2 / subatmospheric
- avoid hyperventilation
Blood flow in mixing lesions is dependent on ________
vascular resistance
In obstructive lesions the ____ provides systemic flow
PDA
Primum ASD is in the ____ part of the atrial septum and is near the ____ valve
inferior; AV
Secundum ASD is near ______ _____ .
similar to PFO
fossa ovalis
Sinus venosus is ____ in the atrial septum and is close to ____
high; superior vena cava
ASDs are often closed via
percutaneous catheter device
