Page 285 - Hall et al (2015) Principles of Critical Care-McGraw-Hill

CHAPTER 28: Interpretation of Hemodynamic Waveforms 189

II II II
1 mV 1 mV 1 mV
RV PA
Wedge
II
60 60 60
1 mV
RA

30 30 30 30

0 0 0 0
FIGURE 28-5. Waveform transition as catheter is advanced from the right atrium (RA) to the wedge position. Note the increase in diastolic pressure as the catheter passes from the right
ventricle (RV) to the pulmonary artery (PA). Dashed horizontal lines represent mean pressure. Scale in millimeters of mercury.

Ppa with catheter whip

30 –

0 –
FIGURE 28-6. Catheter “whip” in the pulmonary artery pressure (Ppa) tracing. Scale in millimeters of mercury.

A B

RA RA
– 30 –
– 30 – A A
V CV C
A X
X’ Y
x y
– 0 – – 0 –
C

PA PW
– 60 –
S
V
A
n
X Y
– 0 –
FIGURE 28-7. Right atrial (RA), pulmonary artery (PA), and pulmonary artery wedge (PW) waveforms recorded with a simultaneous electrocardiographic lead. See text for discussion.
Scale in millimeters of mercury.

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