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- Conference Proceeding (1) (remove)
Keywords
- Signal averaging ECG, Spectral-temporal mapping, Fractionated ventricular signals, Fractionated atrial signals, Atrial fibrillation, Ventricular tachycardia (1) (remove)
Targeting complex fractionated atrial electrocardiograms
detected by automated algorithms during ablation of
persistent atrial fibrillation has produced conflicting
outcomes in previous electrophysiological studies and
catheter ablation of atrial fibrillation and ventricular
tachycardia. The aim of the investigation was to evaluate
atrial and ventricular high frequency fractionated electrical
signals with signal averaging technique. Methods:
Signal averaging electrocardigraphy allows high resolution
ECG technique to eliminate interference noise signals
in the recorded ECG. The algorithm use automatic ECG
trigger function for signal averaged transthoracic, transesophageal
and intra-cardiac ECG signals with novel
LabVIEW software. Results: The analysis in the time
domain evaluated fractionated atrial signals at the end of
the signal averaged P-wave and fractionated ventricular
signals at the end of the QRS complex. We evaluated
atrial flutter in the time domain with two-to-one atrioventricular
conduction, 212.0 ± 4.1 ms atrial cycle length,
426.0 ± 8.2 ms ventricular cycle length, 58.2 ± 1.8 ms
P-wave duration, 119.6 ± 6.4 ms PQ duration,
103.0 ± 2.4 ms QRS duration and 296.4 ± 6.8 ms QT
duration. The analysis in the frequency domain evaluated
high frequency fractionated atrial signals during the
P-wave and high frequency fractionated ventricular
signals during QRS complex. Conclusions: Spectral
analysis of signal averaging electrocardiography with
novel LabVIEW software can be utilized to evaluate atrial
and ventricular conduction delays in patients with atrial
fibrillation and ventricular tachycardia. Complex fractionated
atrial and ventricular electrocardiograms may be
useful parameters to evaluate electrical cardiac bradycardia
and tachycardia signals in atrial fibrillation and
ventricular tachycardia ablation.