8636-3

LOINC 2.82

Q-T interval corrected

Definition

  • 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.

Component

  • QTC interval

Specimen / system

  • Heart

Class

  • EKG.MEAS

Property

  • Time

Scale

  • Qn

Related names

  • Cardiac; Cardio; Cardiology; EKG; EKG.MEASUREMENTS; Electrocardiogram; Heart Disease; Hrt; Point in time; QNT; Q-T interval corrected; Quan; Quant; Quantitative; Random

Index terms

  • Cardiac
  • Cardio
  • Cardiology
  • EKG
  • EKG.MEASUREMENTS
  • Electrocardiogram
  • Heart Disease
  • Hrt
  • Point in time
  • Q-T interval corrected
  • QNT
  • QTC interval
  • Quan
  • Quant
  • Quantitative
  • Random