What is the normal pressure in the PCWP/Left Atrium (LA)?

What is the normal pressure in the PCWP/Left Atrium (LA)?

• A. 2-6 mmHg
• B. 4-12 mmHg
• C. 6-14 mmHg
• D. 8-16 mmHg

Answer: (B)

Pulmonary capillary wedge pressure mirrors left atrial pressure, so it reflects left-sided filling pressures. In a healthy person at rest, this pressure is typically in the 4–12 mmHg range. The wedge measurement is obtained by wedging a catheter in a small pulmonary artery branch, which equilibrates with the left atrium when there’s no obstruction. Therefore, the normal range for PCWP/LA pressure is about 4–12 mmHg. Values below this suggest low preload, while values above indicate elevated left-sided pressures, such as in left ventricular dysfunction or volume overload.

Pulmonary capillary wedge pressure mirrors left atrial pressure, so it reflects left-sided filling pressures. In a healthy person at rest, this pressure is typically in the 4–12 mmHg range. The wedge measurement is obtained by wedging a catheter in a small pulmonary artery branch, which equilibrates with the left atrium when there’s no obstruction. Therefore, the normal range for PCWP/LA pressure is about 4–12 mmHg. Values below this suggest low preload, while values above indicate elevated left-sided pressures, such as in left ventricular dysfunction or volume overload.