Which Information Is Essential for the Nurse to Keep in Mind

Which information is essential for the nurse to keep in mind when monitoring a patient's central venous pressure?

A) It is better to look at current numbers for central venous pressure monitoring rather than trends.
B) Central venous pressure is a direct measurement of systemic vascular resistance.
C) A decreasing trend in central venous pressure may indicate right heart failure.
D) An increasing trend in central venous pressure may result from fluid building in the lungs.