A nurse is caring for a patient in the cardiovascular intensive care unit (CVICU) following a coronary artery bypass graft (CABG). Which of the following clinical findings requires immediate intervention by the nurse?
a) CVP reading: 1 mmHg
b) Heart rate: 66 bpm
c) Blood pressure: 110/68 mmHg
d) Pain score: 5/10.
Answer: CVP reading: 1 mmHg