What is the role of pulmonary arterial pressure in pulmonary artery catheterization (PAC)?

Updated: Dec 22, 2017
  • Author: Bojan Paunovic, MD; Chief Editor: Karlheinz Peter, MD, PhD  more...
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In the pulmonary artery pressure (Ppa) tracing, an initial positive upstroke secondary to RV systole occurs, and a dicrotic notch is formed on the downstroke when the pulmonary valve closes. A normal PA systolic pressure ranges from 20 to 30 mm Hg and is equal to the RV systolic pressure. Ppa is elevated in some high-flow states (eg, hypervolemia), left ventricular failure, and high-resistance states (eg, pulmonary hypertension, mitral valve disease) (see image below).

Pulmonary arterial pressure (Ppa) waveform. Pulmonary arterial pressure (Ppa) waveform.

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