Pulmonary capillary wedge pressure (PCWP) normally falls in which range?

Pulmonary capillary wedge pressure (PCWP) normally falls in which range?

• A. 2-6 mmHg
• B. 4-12 mmHg
• C. 8-16 mmHg
• D. 12-20 mmHg

Answer: (B)

Pulmonary capillary wedge pressure is a surrogate for the left atrial pressure and thus reflects left-sided preload. It’s measured by occluding a small branch of the pulmonary artery with a balloon-tipped catheter, so the pressure read comes from the filling pressure on the left side of the heart. In healthy individuals, this left atrial pressure—and the corresponding wedge pressure—typically falls in about 4 to 12 mmHg. Therefore, the normal range is four to twelve. Values within this range indicate normal left-sided filling pressures; higher values point to conditions like left heart failure or volume overload causing elevated left atrial pressure, while lower values suggest hypovolemia or reduced venous return.

Pulmonary capillary wedge pressure is a surrogate for the left atrial pressure and thus reflects left-sided preload. It’s measured by occluding a small branch of the pulmonary artery with a balloon-tipped catheter, so the pressure read comes from the filling pressure on the left side of the heart. In healthy individuals, this left atrial pressure—and the corresponding wedge pressure—typically falls in about 4 to 12 mmHg. Therefore, the normal range is four to twelve. Values within this range indicate normal left-sided filling pressures; higher values point to conditions like left heart failure or volume overload causing elevated left atrial pressure, while lower values suggest hypovolemia or reduced venous return.