LOINC Code 79949-4: Aortic valve Maximum regurgitant blood flow velocity during diastole by US.doppler continuous wave

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 Regurgitant blood flow velocity.diastole.max. It is commonly used with the system or sample type Aortic valve.

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.CW

What it does not mean

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

Key facts

• Aortic valve Maximum regurgitant blood flow velocity during diastole by US.doppler continuous wave
• Regurgitant blood flow velocity.diastole.max
• AO; AoV; AV; Bld flow; Bld flow vel; Bld flow.velocity; CARD.US; CARD.US.DICOM; Cardio; Cardiology; Continuous wave; Dias; Dias.max; Diast; Diastoli; DOP; DOP.CW; DUPLEX; Dynamic; Echography; Heart Disease; Largest; Max regurg vel dias; Max V; Maximal; Maximum; Peak; Point in time; QNT; Quan; Quant; Quantitative; Random; Regurg bld flow vel; Sonogram; Sonograph; Sonography; ULS; Ultrasound; V max; Vel; VEL max; Velocity; Vmax; Vmax dias

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