Version 2.78

Term Description

The purpose of calculating a corrected QT interval (QTc) is to normalize each individual QT measurement from a given study to a single measurement that would represent the QT interval if the patient had a heart rate of 60 beats per minute. Several formulas are available to calculate QTc, including the Bazett formula and the Fridericia formula. Bazett's formula is used most commonly, but for situations in which the patient's heart rate is significantly elevated, the Fridericia formula may yield a more accurate QTc that reflects the QTc that would have been obtained were the patient in normal sinus rhythm. PMID: 23972343 Use this LOINC code to report a QTc without specifying a method. For QTc by Fridericia use 76634-5, and for QTc by Bazett use 76635-2.
Source: Regenstrief LOINC

Fully-Specified Name

Component
QTC interval
Property
Time
Time
Pt
System
Heart
Scale
Qn
Method

Additional Names

Short Name
Q-T interval corrected

Basic Attributes

Class
EKG.MEAS
Type
Clinical
First Released
Version 1.0h(3)
Last Updated
Version 2.73
Order vs. Observation
Observation
Common Test Rank Get Info
1454

Member of these Panels

LOINC Long Common Name
34534-8 12 lead EKG panel
88677-0 German Interdisciplinary Association of Intensive Care and Emergency Care Medicine - recommended MIND protocol set
75885-4 IEEE 11073 Rosetta panel

Language Variants Get Info

Tag Language Translation
es-AR Spanish (Argentina) QTC INTERVAL:tiempo:punto en el tiempo:corazón:cuantitativo:
es-MX Spanish (Mexico) Intervalo QTC:Tiempo:Punto temporal:Corazón:Cuantitativo:
it-IT Italian (Italy) QTC, intervallo:Tempo:Pt:Cuore:Qn:
Synonyms: Elettrocardiogramma - misurazioni Intervallo Q-T corretto Punto nel tempo (episodio) Tempo (e.g. secondi)
pt-BR Portuguese (Brazil) QTC intervalo:Tempo:Pt:Coração:Qn:
Synonyms: ; Q-T interval corrected; Point in time; Random; Hrt; Cardiac; Quantitative; QNT; Quant; Quan; EKG.MEASUREMENTS; EKG.MEASUREMENTS; Electrocardiogram
ru-RU Russian (Russian Federation) QTC интервал:Время:ТчкВрм:Сердце:Колич:
Synonyms: Время (в т.ч. в секундах) Количественный Корректированный интервал QT Точка во времени;Момент
zh-CN Chinese (China) QTC 间期:时间:时间点:心脏:定量型:
Synonyms: EKG QTC 间期（间隔、时间间隔、间隔时间）;QTC 间隔;QTC 时间间隔;QTC 间隔时间 可用数量表示的;定量性;数值型;数量型;连续数值型标尺 心 心动电流图 心动电流图.检测指标;心动电流图检测指标;心电图检测指标;检测指标 心动电流图描记器 心动电流描记器 心电图（Electrocardiogram，Electrocardiograph，EKG） 心电图仪 心电图描记器 心电图机 心电图机（Electrocardiograph，EKG） 心电图记录仪 心电描记器 心电机 心电记录仪 时刻;随机;随意;瞬间 时间(如秒);时间(如秒数)

Example Units

Unit Source
s Example UCUM Units

LOINC Terminology Service (API) using HL7® FHIR® Get Info

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=8636-3