late potential


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Related to late potential: ventricular late potential, SAECG

late potential

Cardiology A high-frequency, low-amplitude signal at the tail of a QRS complex, which is attributed to fragmented and delayed electrical conduction through the borders of a myocardial scar; delayed conduction of LPs allows reentry of electrical impulses and ↑ susceptibility to ventricular arrhythmias

late potential

Deflections found on signal-averaged electrocardiograms that follow the QRS complex and point to an increased likelihood of ventricular dysrhythmias. These deflections represent delays in electrical conduction through the ventricles.
See also: potential
References in periodicals archive ?
Conclusion: Ventricular late potentials were strongly associated with left ventricular hypertrophy.
Keywords: Left ventricular hypertrophy, Systemic arterial hypertension, Ventricular late potentials.
Time domain measures of NN variability were significantly higher (subgroup B) while asleep than while awake in ARVC/D patients who had negative late potentials, and were significantly lower in those with positive LP (subgroup A) p<0.
Furthermore, in combination with late potentials they improve recognizing hidden risks for serious arrhythmias.
Ventricular late potentials were detected through analysis of filtered QRS complex which characteristically included duration of the filtered QRS complex (fQRS) >114 ms, low amplitude signals (LAS) under 40 uv in the terminal QRS complex >38 ms and root mean square (RMS) voltage in the terminal 40 ms 114 ms in 20 out of total 27 patients in which signal averaged ECG was found positive for detection of ventricular late potentials (p-value 114 ms in higher number of patients with left ventricular hypertrophy in which signal averaged ECG was found positive as compared to those without it(p-value = 0.
AHA/ACC/ESC Policy Statement: "Standards for the Analysis of Ventricular Late Potentials Using High Resolution or Signal-Averaged Electrocardiography: A Statement by a Task Force Committee of the European Society of Cardiology, the American Heart Association and the American College of Cardiology.
Prognostic value of late potentials in patients with congestive heart failure.
Out of these, 8 (67%) patients had ventricular late potentials on signal averaged ECG.
Signal averaged electrocardiogram of every patient was recorded using computer software for the presence or otherwise of ventricular late potentials.
Zareba, who has used the ART's patented Predictor(R) signal averaging software extensively, commented, "Signal averaged ECG with detailed analysis of QRS duration and late potentials is a very valuable tool in stratifying patients at risk of cardiac death.
MTWA outperformed nine other risk indices including late potentials as measured by signal averaged ECG and non-sustained ventricular tachycardia (NSVT) on Holter monitoring.