Abstract：
:Implantable cardioverter defibrillators (ICDs) can store intracardiac electrograms (EGMs) in sinus rhythm (SR), at the onset of spontaneous ventricular tachyarrhythmias (VT) or during their course. This allows the investigation of unknown features of the heart electrical activity associated with different cardiac rhythms. In this study we propose a non conventional cardiac electrical activity characterization (CEAC) that extracts quantitative information about the power spectrum wideness and variability of the beat-by-beat morphology. We analyze 293 EGMs from 40 patients who underwent implantation of St Jude Medical-Ventritex ICDs that allow the storage of EGMs with two different modes of recording: bipolar (BIP) and unipolar or far-field (FF). The EGMs are studied with this CEAC by (1) exploring differences between the CEAC measured from FF and BIP EGMs during similar cardiac rhythms, and (2) investigating the mode of recording that allows a better separation between SR and VT rhythms. Results show that, with similar cardiac rhythm, the CEACs from FF or BIP recordings are different (for SR rhythm: sensitivity 81.5%, specificity 93.6%; for VT rhythm: sensitivity and specificity 100%); thus FF and BIP EGMs analyze different aspects of cardiac activity. The CEAC applied to FF EGMs distinguishes better EGMs obtained during SR from VT rhythms (VT vs SR with sensitivity 92.7% and specificity 79.7%) than when it is applied to BIP signals (VT vs SR with sensitivity 60% and specificity 73.3%).
journal_name
Med Biol Eng Computjournal_title
Medical & biological engineering & computingauthors
Casaleggio A,Rossi P,Faini A,Guidotto T,Malavasi V,Musso G,Sartori Gdoi
10.1007/s11517-005-0014-0subject
Has Abstractpub_date
2006-03-01 00:00:00pages
45-53issue
1-2eissn
0140-0118issn
1741-0444journal_volume
44pub_type
杂志文章abstract：:Successful identification of gastric slow waves in canine gastric electrical activity (GEA) data was achieved using a statistical data-processing procedure based on the multiple linear regression (MLR) curve fitting technique. Both distal and proximal waveforms were identified, first by construction of separate orthon...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02345076
更新日期：2002-07-01 00:00:00
abstract：:The clinical efficacy of a microwave (MW) hyperthermia system using an electric-field converging (lens) applicator is evaluated for 42 malignant tumours with a maximum tumour depth of less than 7 cm. The mean of the maximum, average and minimum tumour temperature of the 42 tumours are 44.5, 42.5 and 40.7 C, respective...
journal_title：Medical & biological engineering & computing
pub_type： 临床试验,杂志文章
doi：10.1007/BF02522944
更新日期：1995-01-01 00:00:00
abstract：:Even though the World Health Organization criteria's for classifying the dengue infection have been used for long time, recent studies declare that several difficulties have been faced by the clinicians to apply these criteria. Accordingly, many studies have proposed modified criteria to identify the risk in dengue pa...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-009-0561-x
更新日期：2010-03-01 00:00:00
abstract：:To explore the promising therapeutic applications of short nanosecond electric pulses, in vitro and in vivo experiments are highly required. In this paper, an exposure system based on monopole patch antenna is reported to perform in vivo experiments on newborn mice with both monopolar and bipolar nanosecond signals. A...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-016-1547-0
更新日期：2017-07-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02524237
更新日期：1994-11-01 00:00:00
abstract：:Fetal heart rate (FHR) monitoring is used routinely in labor, but conventional methods have a limited capacity to detect fetal hypoxia/acidosis. An exploratory study was performed on the simultaneous assessment of maternal heart rate (MHR) and FHR variability, to evaluate their evolution during labor and their capacit...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-015-1359-7
更新日期：2016-04-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02534088
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-009-0559-4
更新日期：2010-01-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02513357
更新日期：1999-09-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-017-1620-3
更新日期：2017-09-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02344868
更新日期：2000-11-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02523009
更新日期：1995-11-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-012-0957-x
更新日期：2012-12-01 00:00:00
abstract：:Respiratory sinus arrhythmia (RSA) is the variation of heart rate (or RR interval) in phase with respiration and has been extensively studied. However, the effect of respiration on atrioventricular conduction delay (and hence PR interval length) has not yet received much attention. This work reports on measurements of...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02345298
更新日期：2002-11-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-019-02013-x
更新日期：2019-09-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-007-0224-8
更新日期：2007-10-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02510497
更新日期：1995-05-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-016-1559-9
更新日期：2017-05-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-020-02180-2
更新日期：2020-07-01 00:00:00
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
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更新日期：2016-07-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
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更新日期：2013-12-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
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更新日期：1998-05-01 00:00:00
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journal_title：Medical & biological engineering & computing
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更新日期：2010-08-01 00:00:00
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
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更新日期：2013-02-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
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更新日期：1995-05-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
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更新日期：1995-07-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
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更新日期：2012-09-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
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