Liver Stiffness in Congestive Hepatopathy and Right Ventricular Failure: Interpretation of Elastography
The Issue of Congestive Hepatopathy in Elastography
According to available materials, congestive phenomena are among the conditions affecting the measurement of liver stiffness, along with inflammation (ALT control) and fasting status. Right ventricular failure creates venous congestion, which increases the measured stiffness of the parenchyma unrelated to true fibrosis, which must be considered when interpreting values in kPa and m/s.
Reflection in the Study Protocol
In the working structure of the elastography protocol (point SWE / ElastPQ), heart failure is directly indicated as a possible cause of unacceptable study quality — in the “Study Quality” section, the reason should be specified (obesity, ascites, cholestasis, heart failure, inflammatory episode, etc.).
Indicative Thresholds (for Reference)
The thresholds below relate to the assessment of fibrosis and are not calibrated for conditions of venous congestion, where values may be elevated. According to fragment data, exact thresholds vary by etiology.
| Stage | ElastPQ (EFSUMB), kPa |
|---|---|
| F0–F1 | < 7.0 |
| F ≥ 2 | ≥ 7.0 |
| F ≥ 3 | ≥ 9.0–9.5 |
| F4 (cirrhosis) | ≥ 12.0–13.0 |
For pSWE/2D-SWE according to literature data (not specific to any manufacturer): normal (F0) is usually < 5.5–6.0 kPa; cirrhosis (F4) > 10–12 kPa (according to several consensuses — > 11–13 kPa). In m/s for pSWE: normal is usually < 1.34–1.40 m/s, cirrhosis — > 1.8–2.0 m/s.
Conditions and Reservations When Suspecting Congestion
The result is influenced by fasting status (≥2–3 hours of fasting recommended, per protocol — fasting ≥4 hours), absence of inflammation (ALT control), and absence of congestive phenomena. In identified or suspected right ventricular failure, increased stiffness cannot be unequivocally interpreted as fibrosis, and it is advisable to note the congestion factor as a limitation in the conclusion. Specific adjustment values or separate thresholds for congestive hepatopathy are not provided in the materials [specify].
Frequently asked questions
Why is liver stiffness elevated in right ventricular failure?
Venous congestion is among the factors affecting the measurement result; it increases the stiffness of the parenchyma independently of true fibrosis, so values may be falsely elevated.
How to reflect congestion in the elastography protocol?
In the “Study Quality” section, heart failure is indicated as a possible cause of unacceptable quality — it should be recorded as a study limitation.
Can standard fibrosis thresholds be used in congestion?
The provided thresholds (EFSUMB for ElastPQ, literature for pSWE/2D-SWE) are calibrated for fibrosis; specific thresholds for venous congestion conditions are not available in the materials [specify], so values should be interpreted with caution.
What preparation conditions reduce the influence of distorting factors?
Fasting (≥4 hours per protocol, ≥2–3 hours per general data), inflammation control (ALT), and absence of congestive phenomena.
What values are considered normal and cirrhosis for pSWE?
Normal (F0) is usually < 5.5–6.0 kPa or < 1.34–1.40 m/s; cirrhosis (F4) — > 10–12 kPa (according to several consensuses > 11–13 kPa) or > 1.8–2.0 m/s.