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10 Cards in this Set

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  • Back
what vessel gives the fetus the most highly oxygenated blood?
umbilical vein
what conditions are necessary for clossure of Ductus Arteriosus at birth?
normal pH and good oxygenation
What happens if pulmonary vascular resistance does not drop at birth? (lack of aveolar and systemic O2 saturation)
fetal circulation persists, and cyanosis develops
why does it take 6 weeks to reach normal PVR levels?
it takes time for the pulmonary arterioles to thin
ASD
since PVR is less than systemic resistance (and RV is more compliant than LV), blood will flow from L to R
after equalization, blood still flows from L to R (LV less compliant)
Murmur heard in pulmonary area due to increased flow
since pressures stay relatively low, may be assymptomatic til 30
recomendation: surgery or catheter therapy by elementary school
Patent Foramen Ovale
normal: increase in RA pressure closes foramen
if not, valsalva or cough or pulmonary HTN could lead to paradoxical embolism
VSD- large
L to R shunt
CHF
surgical or catheter closure
VSD medium
L to R shunt
assymptomatic for years; eventually causes pulmonary HTN due to Eisenmenger syn.(cyanotic) Eval all kids with systolic murmurs!!

treat pulm. HTN, transplant, cant close VSD
patent ductus arteriosus
prevalent in premature babies
large PDAs produce L to R shunt
Eisenmenger death
high risk of infection to fix
indomethacin is usually successful to close; if not catheter therapies
what are the signs and symptoms of CHF in babies?
tachypnea and hard breathing
poor feeding
low weight
tachycardia S3
hepatomegaly
decreased pulses, cool extremities