Unipolar Electrogram Morphology to Assess Lesion Formation During Catheter Ablation of Atrial Fibrillation

Characteristics of Cavotricuspid Isthmus Ablation for Atrial Flutter Guided by Novel Parameters Using a Contact Force Catheter

“…Previous studies of left atrial ablation, however, have demonstrated that traditional parameters such as initial impedance measurements, unipolar and bipolar EGM amplitude do not correlate to CF parameters. 4,[13][14][15] This was also demonstrated in our study with no correlation observed between CF parameters (CF, FTI) and EGM amplitude change and a weak correlation with impedance drop. This is not unexpected as decrease in impedance has previously been demonstrated to be a modest predictor of average total CF in the left atrium.…”

Catheter Ablation for Paroxysmal Atrial Fibrillation

“…Indeed, entrance and exit blocks are frequently found before complete anatomic encircling, suggesting that they should not be sufficient end points alone for predicting durable PVI. 16 Whether other intraprocedural markers for exposing ablation line gaps such as waiting time, adenosine, loss of pace capture, and unipolar signal conformation 17 would have improved durable PVI rates even further in the present study remains unknown. The definition of targeted triggers in this study also seems to have also evolved during the study time period where only sustained non-PV triggers (>30 seconds) were targeted for ablation, but starting from 2008, nonsustained drivers including premature atrial contractions from ectopic sites were also considered to be non-PV triggers.…”

Initial Experience with the BioSig PURE EP™ Signal Recording System: An Animal Laboratory Experience

“…The ultimate solution is improved front-end filtering so that acquired and displayed waveforms are visible and clean during the application of RF energy. 17,18,[21][22][23] Unfortunately, in conventional recording systems, unipolar signals referenced to WCT tend to be noisy. The low cut-off frequency for the highpass filter requires an expanded dynamic range to fully capture the recorded signals with baseline drift.…”