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A patient has a pulmonary artery catheter in place. The dicrotic notch is visible on the PA waveform. The following data is obtained:

PAP 22 torr CVP 10 torr
PCWP 12 torr
C.I. 4.0 L/min/m2
Which of the following is an accurate interpretation of this data?
A. hypovolemia
B. pulmonary hypotension
C. congestive heart failure
D. hypervolemia

User Taldakus
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1 Answer

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Final answer:

The measurement values suggest congestive heart failure due to the elevated central venous pressure and pulmonary capillary wedge pressure, which are indicative of high pressures in the heart that are typically seen in such a condition.

Step-by-step explanation:

You asked about the interpretation of data obtained from a patient with a pulmonary artery catheter in place, displaying a dicrotic notch on the PA waveform. The recorded pulmonary artery pressure (PAP) is 22 torr, central venous pressure (CVP) is 10 torr, pulmonary capillary wedge pressure (PCWP) is 12 torr, and cardiac index (C.I.) is 4.0 L/min/m2. These values suggest possible congestive heart failure (CHF). In CHF, you can expect to see elevated CVP and PCWP as observed in the data provided. The CVP indicates the pressure in the vena cava/right atrium and hence gives an idea of the right ventricular end-diastolic pressure and right atrial pressure, whereas the PCWP is an estimation of left ventricular end-diastolic pressure, giving an indirect measure of left atrial pressure. The PAP is within normal range, ruling out pulmonary hypotension, and the PCWP is also elevated, which is more indicative of CHF than hypovolemia or hypervolemia without the presence of a clinical context suggesting fluid overload or fluid loss.

User John Mike
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