Other etiologies of T-wave oversensing may include changes in QT duration (long and short QT syndromes), electrolyte imbalances such as hyperkalemia and hyperglycemia, histamine-2 receptor blockers, low amplitude R waves, exercise, Brugada syndrome, changes in sympathetic tone, an injury current-related increase in the T-wave voltage, alterations in morphology of the intracardiac electrogram
, and hyperacute T-wave changes observed during device implantation (2-5).
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.
Figure 2 shows the electrogram
from the atrial and ventricular leads while performing pacing in the cath-lab.
These devices can deliver critical high-quality information, such as temperature, mechanical force, blood flow and electrogram
, to the surgeon in real time.
The investigators analyzed medical records from 1,658 patients at the center who received an implantable cardioverter defibrillator (ICD) system equipped with intracardiac electrogram
storage between 1996 and 2006.
The topics are: from generator to pulmonary vein isolation, fluoroscopic anatomy of the left atrium, PVAC management in practice, the electrode and the electrogram
, assessing pulmonary vein isolation using the PVAC and the coronary sinus catheter, differential pacing beyond the coronary sinus to validate isolation of the pulmonary vein, additional maneuvers to ensure pulmonary vein isolation, and unusual tracings during ablation using the PVAC.
In the presence of atrial pacing leads, accurate diagnostic information can be obtained by obtaining a multi-lead atrial electrogram
Hazardous incidents included: ventilation rate changes and total switch-offs of mechanical ventilators; complete stoppage of syringe pumps; external pacemaker malfunctions; complete stoppage of renal replacement devices; and, electrocardiogram interference in atrial and ventricular electrogram
curves read by the pacemaker programmer.
Moreover, segments 5 and 7 of isolate 02VN178b and segments 8 and 11 of isolate 02VN009b showed a mixed electrogram
pattern of clusters V and IV or III.
The intermediate electrode was positioned in the process of localization of maximal unipolar atrial electrogram
For each ICD-recorded episode of tachyarrhythmia, the date, time, beat-to-beat intervals, and intracardiac electrogram
before, during, and after episodes were recovered from the ICD.
Dr Kelly's doctor will explain the electrogram
pads, found on the scientist's body, and the physical strain placed on the Nobel Prize nominee.