Sunday, September 30, 2007

NCLEX 3 CV DEFECTS






Congenital heart defects


Classification:


1.Acyanotic heart defects
Oxygenated blood is shunted from the systemic to pulmonary circulation (left-to-right shunt) and blood leaving the aorta is completely oxygenated.
Increased blood volume on right side of heart results in hypertrophy of right ventricle.
Eventually, most acyanotic heart defects will result in CHF.

2.Cyanotic heart defects
Unoxygenated blood is shunted from the right to the left side of the heart where it mixes with oxygenated blood.
The blood pumped to the peripheral tissues has a much lower oxygen content than normal, causing the bluish color called cyanosis.


1. Infant in CHF- highest priority is maintaining adequate fluid balance.

2. Difference of cyanotic and acyanotic defects: pulse oximeter does not read over 93% ( n =95 and above)

3. Tetralogy of fallot- cyanotic-tet spell- most important set up on bed side= oxygen set-up.

4. infants BP is very hight- initial action of nurse?= measure the cuff , should be 2/3 of the humerus.

5. 10 yr old with VSD for cardiac cath= highest priority for assessment is : pedal pulses. Breath sounds are

priority but pedal pulses is more a priority since the procedure is invasive(circulation).

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