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Related to late potential: ventricular late potential, SAECG
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CardioScan premium luxury software was used for analysis of ventricular late potentials.
Fisher exact test was used for comparison of proportions of late potentials between groups (Table 2).
Detection of ventricular late potentials in patients with left ventricular hypertrophy provides a practical and cost effective method to identify the possible electrophysiological substrate underlying the life threatening ventricular arrhythmias which may result in sudden cardiac death9.
Time-domain averaging is a computer-driven sequential digital process based on the vector analysis of three orthogonal ECG leads (X, Y, and Z) that separates and extracts high-frequency late potentials from lower frequency ST segments by the use of directional filters, enabling filter output to correspond in time to signal input.
It is known that late potentials are seen more frequently in post MI patients that have spontaneous or induced sustained ventricular tachycardia.
Signal averaged ECG (SAECG): Signal-averaged ECG has shown a significant correlation between presence of late potentials and occurrence of sustained VT (73,74).
In comparison, about one-third of the patients whose vessels remained partly blocked showed late potentials on their electrocardiograms.
Signal Averaged ECG of every patient was recorded using 1200 EPX High Resolution Electrocardiograph and was analyzed for the presence or otherwise of ventricular late potentials.
A positive microvolt TWA test, nonsustained ventricular tachycardia, and ventricular late potentials were predictors of events, and percutaneous coronary intervention decreased the risk rate.
Objectives: To determine frequency of ventricular late potentials in healthy individuals and in patients with mitral valve prolapse and to identify patients with Mitral Valve Prolapse at high risk of sudden death based upon ventricular late potentials.
ART's patented signal averaging electrocardiogram ("SAECG") analysis software will be used to assess the presence of cardiac late potentials in patients enrolled in the study in conjunction with other non-invasive cardiac tests.