76635-2

LOINC 2.82

Q-T interval corrected based on Bazett formula

Q-T interval corrected Bazett

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] To report a QTc without specifying a method, use LOINC code 8636-3 QT interval corrected. To report QTc calculated using the Fridericia formula, use LOINC code 76634-5.

Component

  • QTc interval

Specimen / system

  • Heart

Class

  • EKG.MEAS

Property

  • Time

Scale

  • Qn

Method

  • Bazett formula

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