LOINCActiveObservation

LOINC Code 17991-1: Left ventricular Cardiac echo volume method

17991-1 is a LOINC code used to identify Left ventricular Cardiac echo volume method 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 Cardiac echo LV volume method. It is commonly used with the system or sample type Heart.ventricle.left.

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 Cardiac echo LV volume method. It is commonly used with the system or sample type Heart.ventricle.left.

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: *

What it does not mean

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

Key facts

  • Left ventricular Cardiac echo volume method
  • Cardiac echo LV volume method
  • See also EJECTION FRACTION
  • CARD.US; Cardiac; Cardiac echo vol method; Cardio; Cardiology; Heart Disease; Hrt; Hrt ventr; Identity or presence; L; LT; LV; Meth; Method of; Nominal; Point in time; Random; Ultrasound; Ventricular; Vol

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

Left ventricular Cardiac echo volume methodLV Cardiac echo vol methodCardiac echo LV volume methodCARD.USPridPtHeart.ventricle.left

Frequently asked questions

Code details

Code17991-1
SystemLOINC
Display nameLeft ventricular Cardiac echo volume method
DescriptionCardiac echo LV volume method
Short nameLV Cardiac echo vol method
ComponentCardiac echo LV volume method
PropertyPrid
TimingPt
System (specimen)Heart.ventricle.left
ScaleNom
Method*
ClassCARD.US
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.27

Part names

Cardiac echo LV volume methodPridPtHeart.ventricle.leftNom*Cardiac echo left ventricular volume methodPresence or IdentityPoint in time (spot)Heart ventricle - left

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 17991-1 | HealthAssure