76635-2
ClinicalQ-T interval corrected based on Bazett formula
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.
LOINC 6-Axis Classification
Component
QTc interval
Property
Time
Time Aspect
Pt
System
Heart
Scale Type
Qn
Method Type
Bazett formula
Details
Class
EKG.MEAS
Order/Observation
Both
Short Name
Q-T interval corrected Bazett
Related Names
Frequently Asked Questions
What is LOINC code 76635-2?
LOINC code 76635-2 identifies "Q-T interval corrected based on Bazett formula". 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.
What does 76635-2 measure?
This code measures QTc interval in Heart. It belongs to the EKG.MEAS class in the LOINC classification.
What is LOINC?
LOINC (Logical Observation Identifiers Names and Codes) is a universal standard for identifying laboratory and clinical observations. It is maintained by the Regenstrief Institute and used worldwide for health data exchange.