The reference line was set as the summit of QRS for the surface ECG, and electrical delay was measured in milliseconds between the reference line on the surface ECG and the onset on the bipolar intracardiac electrogram
. We collected the activation potential (reflected by the activation time) point by point when pulling back the lead and determined that the purple area was the latest activated region while the white one was the earliest.
Caption: Figure 1: AEGM signals of each group of the database: noncomplex fractionated atrial electrogram
(NC AEGM) and complex fractionated atrial electrogram
In the clinical setting, electrogram
recordings are frequently limited to 2.5-5-second segments due to the need for frequent catheter repositioning during the procedure, challenging conventional mapping approaches to precisely identifying substrates in AF and other arrhythmias.
Berte et al., "Bipolar electrograms
characteristics at the left atrial-pulmonary vein junction: toward a new algorithm for automated verification of pulmonary vein isolation," Heart Rhythm, vol.
Cardiac resynchronization therapy optimization using intracardiac electrogram
If the patient presented in atrial fibrillation, complex fractional atrial electrograms
are also mapped during the anatomical mapping of the left atrium.
His preoperative electrogram
revealed LQTS with a 0.47 ms [QT.sub.c] interval, and propranolol medication was started preoperatively after consulting a pediatric cardiologist.
As shown in Figure 6(a), the compressed waveform of the epicardial electrogram
recordings changed dramatically after the second train of electrical stimulation pulses (indicated in green), compared with the previous one.
In the study conducted by Douglas, Berger, Nezo, Shinnichi, Iga, Tomie, Hosaka, Takashi, Nakamura and Seiro  on schizophrenic patients and normal persons by Electrogram
, two results were found after measuring mutation reaction speed: A: there is a reaction shortage to information processing in schizophrenic patients.
With event-triggered intracardiac electrogram
(IEGM) transmissions, the new Biotronik pacemaker series innovates advanced patient monitoring and allows physicians to receive an IEGM along with a notification if atrial fibrillation (AF) occurs.
A 5-French catheter electrode (Japan Lifeline, Tokyo, Japan) was inserted into the esophagus under the monitoring of an esophageal electrogram
and placed to ensure constant atrial capture with the lowest threshold.