Congestive hepatopathy in right ventricular heart failure and Fontan circulation: liver stiffness as a diagnostic pitfall
Pathophysiology of congestion and increased liver stiffness
Right ventricular heart failure leads to elevation of central and hepatic venous pressure. Liver injury develops through reduced blood flow, decreased arterial oxygenation, and increased hepatic venous pressure, ultimately resulting in fibrosis and cirrhosis (Diagnostic Ultrasound: Abdomen & Pelvis, 2022). Typical conditions include tricuspid regurgitation or stenosis, cardiomyopathy, constrictive pericarditis, cor pulmonale, left ventricular heart failure, and surgical palliation of congenital heart defects, including post-Fontan procedure.
The key pitfall for elastography: in Fontan circulation, increased liver stiffness results from high hepatic afterload rather than fibrosis alone (Kutty et al., as referenced in WFUMB Guideline Part 1, 2024). Thus, elevated liver stiffness in the setting of congestion cannot be unequivocally interpreted as fibrosis/cirrhosis.
Ultrasound and Doppler findings of congestive hepatopathy
According to Diagnostic Ultrasound: Abdomen & Pelvis (2022), characteristic features include:
- Dilation of hepatic veins and inferior vena cava (IVC);
- "Venous star" pattern at the junction of IVC and hepatic veins (rather than "rabbit ears");
- Hepatic venous flow: turbulent appearance and pulsatile waveform on Doppler interrogation.
Why elastography is a pitfall in congestion
In the working protocol for liver elastography (point SWE/ElastPQ, Medtrain, 2026), heart failure is directly listed among causes of unacceptable study quality—alongside obesity, ascites, cholestasis, and inflammatory episodes. In congestive hepatopathy, stiffness values may be overestimated due to venous pressure, requiring separate notation in the report.
Practical reference thresholds (not for congestive liver)
Reference thresholds for point SWE (ElastPQ) are provided for reference and validated for chronic diffuse liver diseases but not for congestive hepatopathy:
| Stage | Threshold (ElastPQ, kPa) |
|---|---|
| F0–F1 | < 7.0 |
| F ≥ 2 | ≥ 7.0 |
| F ≥ 3 | ≥ 9.0–9.5 |
| F4 (cirrhosis) | ≥ 12.0–13.0 |
Exact thresholds vary by etiology (EFSUMB, ElastPQ data). Specific validated stiffness thresholds for congestive liver are not provided in the available materials [requires clarification].
Recommendations for interpretation
When suspecting congestive hepatopathy, assess stiffness only in conjunction with Doppler pattern of hepatic veins and IVC and clinical status. Note in the report the presence of heart failure as a factor affecting measurement reliability. Dynamic assessment following hemodynamic correction may help distinguish reversible venous component from true fibrosis [requires clarification].
Frequently asked questions
Can elevated liver stiffness in Fontan circulation be interpreted as fibrosis?
No. Increased stiffness in Fontan circulation results from high hepatic afterload rather than fibrosis alone (Kutty et al., WFUMB Part 1, 2024).
What Doppler findings indicate congestive hepatopathy?
Dilation of hepatic veins and IVC, "venous star" pattern at the IVC-hepatic vein junction, turbulent and pulsatile hepatic venous flow (Diagnostic Ultrasound, 2022).
Is heart failure a cause of unacceptable study quality?
Yes, in the liver elastography protocol, heart failure is listed among causes of unacceptable quality/unreliable measurement (Medtrain, 2026).
Which stiffness thresholds apply to congestive liver?
The presented ElastPQ thresholds (EFSUMB) are validated for chronic diffuse liver diseases but not for congestion. Specific thresholds for congestive hepatopathy are not available in the sources [requires clarification].
What is the mechanism of liver injury in right ventricular heart failure?
Reduced blood flow, decreased arterial oxygenation, and elevated hepatic venous pressure, leading to fibrosis and cirrhosis (Diagnostic Ultrasound, 2022).