Early repolarization and short QT interval in healthy subjects

Comparison of the spatial QRS-T angle derived from digital ECGs recorded using conventional electrode placement with that derived from Mason-Likar electrode position

“…1 Similarly, transmural repolarization heterogeneity resulting in morphological variants of early repolarization has recently been identified as a risk factor for malignant ventricular arrhythmias. 2 Other repolarization abnormalities linked to life-threatening ventricular arrhythmias include microvolt T wave alternans or presence of a wide, notched T wave. 3 Abnormalities of the transmural sequence of repolarization invariably result in alteration of the shape and direction of the repolarization vector loop with change in T wave axis on the surface ECG.…”

Fast, accurate and easy-to-teach QT interval assessment: The triplicate concatenation method

“…Three QTcF values are determined semi-automatically from 3 ECG set, using a superimposed median beat. These 3 QTcF values, each computed from a 10-second ECG, are then averaged [3][4][5][6]. Therefore, QTcF has to be measured three times and this method makes thorough QT studies time consuming and expensive.…”

Clinical correlates of early repolarization and J wave patterns…are they proarrhythmic on their own?

“…In fact, ER and all of its variants are relatively common in healthy young males with slower heart rates. 9 However, given the conflictual and controversial currently available data on this subject, we look forward to seeing the future analysis of Lanza and colleagues on the potential association of ER/J wave and long-term clinical outcome. Currently, we reinforce their suggestions concerning the need for detailed and standardized definitions and methods for measurement of ST elevation and J wave.…”