RCIS Practice Test 2026 – All-in-One Exam Prep

Pulmonary capillary wedge pressure (PCWP) is a measurement that reflects left atrial pressure. When there is an increase in left atrial pressure, the pressure transmitted to the pulmonary circulation also rises, leading to an elevation in PCWP. This is particularly important because elevated PCWP can indicate the presence of heart failure and pulmonary congestion, as it signifies increased filling pressures in the left side of the heart.

Understanding that the PCWP is a result of pressures in the left atrium helps clarify why an increase in left atrial pressure directly correlates with an increase in PCWP. The relationship between these pressures is a crucial concept in assessing left heart function and managing patients with cardiovascular issues. The ability to monitor and interpret PCWP measurements allows healthcare providers to make informed decisions about treatment plans, especially in cases of pulmonary edema or congestive heart failure.