Fridericia Formula for calculating the QT interval on an (ECG) according to heart rate, described in 1920. Louis Sigurd Fridericia (1881-1947)
Bazett formula 'corrects' the measured QT interval to a value (QTc) attributable to a heart rate of 60 bpm. Thus providing a QT interval value that a particular patient would theoretically have if their heart rate was 60 beats/min
Henry Cuthbert Bazett (1885 – 1950) was an English physiologist. Eponym: Bazett's formula to calculate QTc interval for varying heart rates
QT interval is the time from the start of the Q wave to the end of the T wave, time taken for ventricular depolarisation and repolarisation
Louis Sigurd Fridericia (1881-1947) was a Danish physician. Eponymous term - Fridericia's formula: QT interval duration related to the cube root of the RR
This ECG is from a 40 yr old male who presented following a large overdose of an anti-spasmodic agent.