Written by Andrea Fields MHA, RDCS

Hepatic Veins & Right Heart Abnormalities

In Hepatic Veins 101,  we discussed the structure, function and waveforms of the hepatic veins, in regards to the cardiac cycle. This blog will cover how the hepatic veins play a role with the right heart. We tend to forget about the importance and useful information the hepatic veins provide us.  Lets review, how the hepatic veins play a role in:

  • Tricuspid regurgitation (TR)
  • Right heart failure

Tricuspid Regurgitation

The hepatic vein waveform can be reflective on the severity of TR present. The more severe the regurgitation, the more pulsatile the waveform becomes.

Waveform Criteria:

  • Pulsatile waveform
  • Tall A-wave & V-wave
  • Decreased or Reversed S-Wave
  • D-Wave < S-Wave

Let’s breakdown the waveform process during the cardiac cycle when tricuspid regurgitation is present….

Hepatic Vein TR Cardiac Cycle

Hepatic Vein TR Cardiac Cycle

A scale was developed based upon the waveform pattern of the hepatic veins to help with adding more data to assess the severity of TR:

TR Hepatic Vein Type

Right Heart Failure

The hepatic vein waveform can also show indications of right heart failure! The change in waveforms are similar to tricuspid regurgitation…

Right Heart Failure Criteria:

  • Pulsatile waveform
  • Tall A-wave & V-wave
  • Normal relationship between S-wave & D-wave (S > D)
  • S-wave will never become retrograde (in absence of TR)

Hepatic Vein Right Heart Failure

Combined Tricuspid Regurgitation & Right Heart Failure

In some cases, where the patient has both TR and right heart failure, the hepatic waveforms can become biphasic.

  • Single retrograde wave per cardiac cycle
  • Single antegrade wave per cardiac cycle

 

TR & Right Hear Failure Hepatic Vein Fused Biphasic

 

 

In severe cases, the waveforms can fused into one retrograde wave with an antegrade D-wave.

 

 

 

 

 

Items to Note:

  • Hepatic vein waveforms look the same for both Mild TR and for right heart failure (both can have type 1 or 2 waveform patterns)
  • Retrograde S-wave present = some degree of TR is present

Hepatic Vein Systolic Filling Fraction

A ratio of the velocity-time integrals (VTI’s) of the S-wave and sum of both S-wave and D-wave (the ratio excludes the A-wave).

Systolic Filling Fraction

<55% =RAP > 8 mmHg

  • Sensitivity and specificity of 90%
  • Tested with patients on ventilators & proved useful when averaging 5 or more beats!
  • Higher the RAP = Decrease in Systolic Filling Fraction

Hepatic Vein Waveform

Vs/Vd Hepatic Vein Ratio

By measuring the velocity of the S-wave and D-wave, we can obtain a simple ratio to help indicate if an elevated RAP is present.

Vs/Vd < 1 = Elevated RAP

  • Higher the right atrial pressure (RAP), the lower the pressure gradient (PG) between hepatic veins/IVC and right atrium
  • S-wave diminishes due to decrease of systolic flow
  • D-Wave (Vd) Dominant

Let’s take a look at this image below:

  • On the left, a normal waveform pattern is demonstrated showing S/D >1
  • One the right, an abnormal waveform pattern is demonstrated showing S/D <1
    • Indication of elevated RAP

Hepatic Vein Doppler

Conclusion

Now that we have learned both the basics of hepatic veins and the relativity in regards to the heart, we can now implement evaluation of these veins when indicated during our echocardiograms! Here are a few helpful tips to take away…..

  1. Hepatic veins are useful for determining RAP when the IVC is unable to assess for collapsibility
  2. Hepatic vein waveform can help determine severity of TR and presence of right heart failure
  3. Pulsed Doppler the hepatic vein at close proximity to IVC
  4. Dilated hepatic veins (>10mm) can indicate right heart failure and TR
  5. Hepatic veins can be useful in diagnoising additional pathology, in additional to TR and right heart failure
  6. If >moderate TR present, evaluate the hepatic veins

We hope you enjoyed our right heart blog series!

Want a CME for reading this blog? Click below to access CardioServ’s online CME platform offering Cat. 1 AMA CMEs!

Access CMEs

 

 

 

Andrea Fields MHA, RDCS

Stay Connected: LinkedIn, Facebook, Twitter, Instagram

 

 

 

References:

Scheinfield, M. H., MD, Bilali, A., ARDMS, & Koenigsberg, M., MD. (2009). Understanding the Spectral Doppler Waveform of the Hepatic Veins in Health and Disease. RadioGraphics,29, 2081-2098. Retrieved May 31, 2017, from http://pubs.rsna.org/doi/pdf/10.1148/rg.297095715

Rudski, L. G., MD. (2010). Guidelines for Echocardiographic Assessment of the Right Heart in Adults: A Report from the American Society of Echocardiography. JASE, 23, 685-713.

 

 

cmeHepatic VeinsIVCright atriumRight Heartright heart failureright ventricletricuspid regurgitation

LET US KNOW WHAT YOU THINK...

david benedict
Nice presentation of Hepatic Veins & Right Heart Abnormalities. One suggestion (for people like me) please include an ECG tracing on the animated HV waveforms. I think this would assist in a true understanding thus leading to an organic conceptualization.
Cardioserv
Thanks for the feedback! You may enjoy our Hepatic Veins: 101 blog. All the images, in that blog, include the ECG tracings.

Your email will not be displayed.

Required *

Blog
Sign Up

Accreditation
services

Full Service Accreditation
Online
CME
Accreditation Software
Free
Consultation

Search
for

Blog
Categories

Blog
Archive

Tags
Used

Show tags
Sign Up Share