LOINCActive

LOINC Code 59105-7: A-wave duration by US

59105-7 is a LOINC code used to identify A-wave duration by US in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component A wave duration. It is commonly used with the system or sample type Circulatory system.XXX.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

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 duration. It is commonly used with the system or sample type Circulatory system.XXX.

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
  • Method: US

What it does not mean

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

Key facts

  • A-wave duration by US
  • A wave duration
  • The time duration of the A-Wave
  • Atrial wave; A-wave; A-wave duration; CARD.US; Cardio; Cardiology; Circ; Circ sys; Durat; Echography; Heart Disease; Misc; Miscellaneous; Other; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; Spec; To be specified in another part of the message; ULS; Ultrasound; Unspecified

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

A-wave duration by USA-wave duration USA wave durationCARD.USTimePtCirculatory system.XXX

Frequently asked questions

Code details

Code59105-7
SystemLOINC
Display nameA-wave duration by US
DescriptionA wave duration
Short nameA-wave duration US
ComponentA wave duration
PropertyTime
TimingPt
System (specimen)Circulatory system.XXX
ScaleQn
MethodUS
ClassCARD.US
Example unitsms
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.32
Last changed2.54

Part names

A wave durationTimePtCirculatory system.XXXQnUSA-wave durationTime (e.g. seconds)Point in time (spot)Circulatory system XXXUltrasound

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 59105-7 | HealthAssure