Can central venous pressure help identify acute right ventricular dysfunction in mechanically ventilated critically...

Area of Science:

• Critical Care Medicine
• Cardiology
• Pulmonology

Background:

• Acute right ventricular (RV) dysfunction is common in critically ill patients on mechanical ventilation.
• Central venous pressure (CVP) is a commonly monitored parameter, but its utility in assessing RV function is debated.

Purpose of the Study:

• To investigate the relationship between CVP and acute RV dysfunction in mechanically ventilated critically ill patients.
• To determine the accuracy of CVP in identifying RV dysfunction with and without systemic venous congestion.

Main Methods:

• Retrospective study of 518 mechanically ventilated critically ill patients.
• Echocardiographic assessment of RV function (TAPSE, FAC, S') and systemic venous congestion (IVCD, HV Doppler).
• Classification of patients into normal RV function, isolated RV dysfunction, and RV dysfunction with congestion groups.

Main Results:

• CVP showed good discriminative ability for RV dysfunction with congestion (AUC 0.839), with an optimal cutoff of 10 mm Hg.
• CVP had limited accuracy for identifying all patients with RV dysfunction (AUC 0.616).
• Significant "gray zones" were observed for CVP in both analyses, limiting its precise interpretation.

Conclusions:

• CVP may be a useful indicator for RV dysfunction with systemic venous congestion in mechanically ventilated patients, but its accuracy is limited.
• A CVP below 10 mm Hg can help rule out RV dysfunction with congestion.
• CVP should not be solely relied upon to identify general RV dysfunction.