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Transient Data Stream Dissociation in Computerized Data Acquisition System Masquerading as a Sensing Abnormality
Author(s) -
NAIR LAWRENCE A.,
GREENFIELD RUTH ANN,
YARGER MICHAEL,
NIBLEY CARLETON,
WHARTON J. MARCUS
Publication year - 1997
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1997.tb06093.x
Subject(s) - abnormality , medicine , dissociation (chemistry) , data acquisition , shock (circulatory) , transient (computer programming) , computer science , chemistry , psychiatry , operating system
During testing of a CPI model 1715 ICD, an apparent sensing abnormality was noted following shock delivery for VF. Close inspection of the recording prior to the defib‐rillation attempt revealed that the surface leads spontaneously lost 848 ms of data while the event marker was unaffected. Computer simulations revealed that an inadequate buffer size for the ampHfied (surface ECC) data was the likely source of data loss. It is important to recognize tbat a discordance between surface leads and event marker may represent an abnormality in tlie data acquisition system and simulate an ICD or lead malfunction.