Variation in late potentials and the reproducibility of their measurement

American Heart Association/American College of Cardiology Foundation/Heart Rhythm Society Scientific Statement on Noninvasive Risk Stratification Techniques for Identifying Patients at Risk for Sudden Cardiac Death

“…Low-amplitude signal duration and root mean square measures were not associated with arrhythmic events in a large post-MI study (70). The SAECG is moderately reproducible (75), although its reproducibility is impaired by the presence of late potentials and low residual noise (76). The SAECG is either not useful or less useful in patients with right and left bundlebranch blocks.…”

“…If one focuses on men with risk factors, the absolute risk increases to 7%, which corresponds to a relative risk of Ϸ1. 75. However, this only accounts for 32% of all MIs that occur.…”

American Heart Association/American College of Cardiology Foundation/Heart Rhythm Society Scientific Statement on Noninvasive Risk Stratification Techniques for Identifying Patients at Risk for Sudden Cardiac Death

“…70,[72][73][74] Low-amplitude signal duration and root mean square measures were not associated with arrhythmic events in a large post-MI study. 70 The SAECG is moderately reproducible, 75 although its reproducibility is impaired by the presence of late potentials and low residual noise. 76 The SAECG is either not useful or less useful in patients with right and left bundle-branch blocks.…”

Limitations and Possibilities of Noninvasive Risk Stratification for Sudden Cardiac Death

“…Total enrollment (N) is indicated for each trial (with kind permission from [7] Leider ist das SAECG nur mäßig reproduzierbar [17] und bei Patienten mit Links-oder Rechtsschenkelblock nicht sinnvoll anwendbar, da die Spätpotentiale verdeckt werden können. Damit können niedrigamplitudige elektrische Potentiale im terminalen Anteil des QRS-Komplexes nachgewiesen werden.…”