LOINC Code 29474-4: Hepatic vein Maximum A wave reversal by US.doppler

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component A wave reversal.max. It is commonly used with the system or sample type Hepatic vein.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Observation
• Method: US.doppler

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• Hepatic vein Maximum A wave reversal by US.doppler
• A wave reversal.max
• Atrial wave; A-wave; A-wave reversal; A-wave reversal.max; CARD.US; Cardio; Cardiology; DOP; DUPLEX; Echography; Heart Disease; Hep v; Hep vein; Hepar; Largest; Liver; Liver vein; Max V; Maximal; Maximum; Peak; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; V max; Velocity; Ven; Venous; Vmax

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions