What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 99688-4: Pacemaker Post-ventricular atrial refractory period setting

Name: LOINC Code 99688-4: Pacemaker Post-ventricular atrial refractory period setting
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:33.066Z

99688-4 is a LOINC code used to identify Pacemaker Post-ventricular atrial refractory period setting 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 Post-ventricular atrial refractory period setting. It is commonly used with the system or sample type Pacemaker.

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 Post-ventricular atrial refractory period setting. It is commonly used with the system or sample type Pacemaker.

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

What it does not mean

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

Key facts

Pacemaker Post-ventricular atrial refractory period setting
Post-ventricular atrial refractory period setting
After; Cardiac pacemaker; Device, Heart-Assist; Point in time; Prosthetic; PST; PVARP setting; QNT; Quan; Quant; Quantitative; Random

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

Pacemaker Post-ventricular atrial refractory period settingPacemaker PVARP settingPost-ventricular atrial refractory period settingDEVICESTimePtPacemaker

Frequently asked questions

Code details

Code99688-4

SystemLOINC

Display namePacemaker Post-ventricular atrial refractory period setting

DescriptionPost-ventricular atrial refractory period setting

Short namePacemaker PVARP setting

ComponentPost-ventricular atrial refractory period setting

PropertyTime

TimingPt

System (specimen)Pacemaker

ScaleQn

ClassDEVICES

Example unitsms

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Part names

Post-ventricular atrial refractory period settingTimePtPacemakerQnTime (e.g. seconds)Point in time (spot)

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.