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- Title
Recording Techniques for Clinical Electrophysiology.
- Authors
STEVENSON, WILLIAM G.; SOEJIMA, KYOKO
- Abstract
The precise techniques employed in the electrophysiology laboratory influence the nature of the electrograms that are recorded during mapping procedures. Unipolar recordings that are minimally filtered can be useful for mapping focal arrhythmia sources, but have substantial far-field signal that can obscure low-amplitude signals of interest in abnormal regions. Bipolar recordings are standard in most laboratories because rejection of far-field signal facilitates identification of local potentials in abnormal areas, but the signal of interest can be beneath either recording electrode and far-field signals do occur. Simultaneously obtained unipolar recordings are a useful adjunct to bipolar recordings in some situations. High pass filtering and digital sampling also influence electrogram characteristics. High pass filtering of unipolar recordings can be useful to reduce far-field components, but limits inferences from electrogram morphology.
- Subjects
ARRHYTHMIA; HEART diseases; ELECTROPHYSIOLOGY; DIAGNOSIS; ELECTRONICS in cardiology; CARDIOLOGY
- Publication
Journal of Cardiovascular Electrophysiology, 2005, Vol 16, Issue 9, p1017
- ISSN
1045-3873
- Publication type
Article
- DOI
10.1111/j.1540-8167.2005.50155.x