electrogram


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electrogram

 [e-lek´tro-gram]
1. any record produced by changes in electric potential.
2. specifically, a cardiogram taken from the chambers of the heart or from a specific position within the chambers.
His bundle electrogram an intracardiac electrogram of potentials in the lower right atrium, atrioventricular node, and His-Purkinje system, obtained by positioning intracardiac electrodes near the tricuspid valve; it is used to pinpoint the site, extent, and mechanisms of arrhythmias and conduction defects.
intracardiac electrogram a record of changes in the electric potentials of specific cardiac loci as measured by electrodes placed within the heart via cardiac catheters; it is used for loci that cannot be assessed by body surface electrodes, such as the bundle of His or other regions within the cardiac conducting system.

e·lec·tro·gram

(ē-lek'trō-gram),
1. Any record on paper or film made by an electrical event.
2. In electrophysiology, a recording taken directly from the surface by unipolar or bipolar leads.

electrogram

Cardiology The recording of the cardiac waveforms as taken at an electrode in the heart; electrogram may be transmitted from an implanted pacemaker by telemetry

e·lec·tro·gram

(ĕ-lek'trō-gram)
1. Any record on paper or film made by an electrical event.
2. electrophysiology A recording taken directly from the surface by unipolar or bipolar leads.
References in periodicals archive ?
Timing of the left ventricular electrogram and acute hemodynamic changes during implant of cardiac resynchronization therapy devices.
The acquisition and processing of atrial electrograms (AEGM) form the usual mapping technique [3], with a vast disparity of models and algorithms used in practice.
Also, the MSE algorithm will be validated with a variety of rotor data for accurate identification of ablation targets using both optical mapping and intracardiac electrograms that can guide patient-specific mapping and ablation.
Caption: Figure 1: Tracings are from ECG lead aVF and intracardiac electrograms recorded from the electrode pairs of the circular mapping catheter positioned at the ostium of the right superior pulmonary vein (RSPV) and coronary sinus (CS).
Comparison of quick optimization of interventricular delay between simple methods: intracardiac electrogram and surface electrocardiogram after cardiac resynchronization therapy.
Typical SBP, ECG, and esophageal electrogram recordings before the transesophageal burst pacing are presented in Figure 1(a).
The heart model is able to perform closed-loop device validation by generating synthetic electrogram signals to the devices and respond to a functional pacing signal from the device through functional interface.
pneumoniae P1 cytadhesin gene, where the positive samples showed amplification products of 375 bp bands on electrogram. This result was supported by other works in which PCR was investigated as a means of diagnosing M.
The electrogram generated from the gel electrophoresis shows that cisplatin treatment resulted in a dramatic oligonucleosome-length degradation of DNA, characterized by mixed smearing and laddering or only smearing of DNA fragments (lane C).
in MADIT, nearly 60% of patients received an ICD shock within two years of ICD implantation but the appropriateness of these shocks could not be assessed due to limitations in electrogram storing capabilities in this generation of devices.