Bedside Ultrasound for Fluid Estimation

Correlation of Internal Jugular and Inferior Vena Cava Diameter Variation on Bedside Ultrasound With Invasive Right Heart Catheterization

The study aims to standardize patient positioning during bedside ultrasound assessment of internal jugular vein (IJV) and correlate the results with invasive hemodynamics obtained immediately after. The study hypothesizes that the respiratory variation in the size of IJV, as estimated through ultrasound at bedside, is an accurate estimation of the patient's actual right atrial pressure estimated through right heart catheterization.

Inclusion Criteria:

• Undergoing right heart catheterization

Exclusion Criteria:

• Superior vena cava obstruction or compression
• Severe tricuspid regurgitation
• Mechanically ventilated patients