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QTc Correction - Formula for Correction of Q-T Interval for Heart Rate

Purpose:

To correct the Q-T interval for various heart rates using Bazett's formula.

Specialty:

Cardiovascular Diseases

Objective:

other testing

ICD-10:

R00

Description:

The Q-T interval becomes longer in bradycardia and shorter in tachycardia. This is due to the shortening or lengthening of the myocardial refractory period. The corrected Q-T interval (referred to as the "Q-Tc") is an attempt to give the theoretical Q-T interval if the heart rate was 60 beats per minute. Bazett proposed a formula for this purpose in 1920.

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