- in jugual or
subclavian vein, typical
CVP pattern is observed.
- as catheter is advanced thru tricuspid valve, into Rt ventricle, one will
see a high amplitude, smooth regular wave form representing the
ventricular contraction; Note: there is not dicrotic notch and that at
its lowest, the wave for is near 0;
- as catheter is advanced thru the pulmonary valve: note:
- Dicrotic Wave Pattern - representing the pulmonic valve closure
after the peak of systole;
- baseline no longer comes close to zero, because pulmonary valve serves
to maintain diastolic pressure in the pulmonary arterial tree;
- as catheter is advanced further into the
wedge position:
- one sees low amplitude, irregular, sawtooth wave form representing
wedge tracing; again,
a, c, and v waves can be
discerned on close inspection;
- Mean pressure in this position is the one which best approximates LA
mean pressure;
