Evaluation of Liver Stiffness Performance, by FibroScan®, to Detect Elevated Central Venous Pressure (CVP)

Inclusion Criteria: 1. Have read, understood, and signed the informed consent form (ICF) 2. Be ≥18 years of age at the time of screening 3. Have suspected or diagnosed acute or chronic HF and be scheduled to undergo right-sided cardiac catheterization Exclusion Criteria: 1. Inability to consent 2. Chronic liver disease (self-reported alcohol use \>14 drinks/week in females and \>21 drinks/week in males), positive hepatitis C virus serology, positive hepatitis B surface antigen, autoimmune hepatitis, hemochromatosis, or cholestatic disease) 3. BMI \>40 kg/m2 4. Fontan-type circulation 5. Ascites 6. Heart transplantation 7. Pregnancy, breastfeeding, or intent to become pregnant during the study 8. Intent to donate/bank or retrieve eggs (ova, oocytes) or donate sperm during the study