Signals and Signal Processing for the Electrophysiologist

Venkatachalam, K; Herbrandson, Joel E.; Asirvatham, Samuel J.

doi:10.1161/circep.111.964973

Cited by 30 publications

(26 citation statements)

References 20 publications

(16 reference statements)

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“…In fact, they represent widely spaced bipolar signals using a reference electrode-the Wilson Central Terminal (WCT). 3 The…”

Section: Discussionmentioning

confidence: 99%

“…The electrical difference of each lead is amplified by an instrumentation amplifier using common-mode rejection ratio (CMRR). 3 Balancing the inputs involves maintaining similar impedances between each input and circuit ground. Any imbalance, such as the high impedance identified in the LL cable, will lead to a significant deleterious effect on CMRR.…”

Section: Discussionmentioning

confidence: 99%

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ST-Segment Elevation Interpretation on Electrocardiogram

2015

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“…In fact, they represent widely spaced bipolar signals using a reference electrode-the Wilson Central Terminal (WCT). 3 The…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

ST-Segment Elevation Interpretation on Electrocardiogram

2015

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“…In the first example, the conventional EP system takes almost 10 s to recover from saturation, while the PURE EPt system (BioSig Technologies, Inc., Minneapolis, MN, USA), with its larger dynamic range, recovers in about 2 s. there could be a smudged view of the entire complex signal owing to clipping. 18 This may hide significant features of the signal and may, in extreme cases, change the way the signal is interpreted. These interactions occur randomly, and cannot be anticipated by the operator.…”

Section: Pitfalls Of Current Recording and Mapping Systems And Possibmentioning

confidence: 99%

“…The ultimate solution is improved front-end filtering so that acquired and displayed waveforms are visible and clean during the application of RF energy. 17,18,[21][22][23] Unfortunately, in conventional recording systems, unipolar signals referenced to WCT tend to be noisy. The low cut-off frequency for the highpass filter requires an expanded dynamic range to fully capture the recorded signals with baseline drift.…”

Section: Pitfalls Of Current Recording and Mapping Systems And Possibmentioning

confidence: 99%

Initial Experience with the BioSig PURE EP™ Signal Recording System: An Animal Laboratory Experience

Padmanabhan

Foxall

Drakulic

et al. 2017

JICRM

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ABSTRACT. Current signal recording and processing systems have come a long way since their initial inception and use. There is, however, still ample scope for improvement, not only in the troubleshooting of their limitations, but also in the expansion of the boundaries in the recording of intracardiac signals. Here, we recount our experience with the use of the PURE EPt signal recording system (BioSig Technologies, Inc., Minneapolis, MN, USA) in the animal laboratory.

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“…An understanding of how recording techniques influence electrograms, including discussion of artifacts is provided by Venkatachalam and coworkers. 8,9 Multicomponent, fractionated electrograms are markers of abnormal conduction and often considered for ablation targets for both ventricular and atrial arrhythmias. De Bakker and Wittkampf discuss the genesis of these signals, how they are influenced by recording techniques, and potential pitfalls related to their use for guiding ablation.…”

Section: Fundamentals Of Electrophysiology Mapping Ablation and Elmentioning

confidence: 99%

Fundamental Concepts in Electrophysiology in Cases and Reviews

Stevenson

Asirvatham²

2013

Circ: Arrhythmia and Electrophysiology

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A ssimilating the increasing body of knowledge required for the treatment of patients with cardiac arrhythmias is a substantial task. The trainee is bombarded with chapters and reviews that are important for providing the frame work from which to develop a detailed and nuanced knowledge acquired from clinical experience and ongoing education. Images and Case Reports provide succinct observations of not only a novel or unusual finding, but often of the fundamentals that must be appreciated to place novel findings in context. The Teaching Points series in Circulation Arrhythmia and Electrophysiology provides a more indepth synthesis of case-based learning building on common and uncommon clinical findings. The purpose of this Casebased Curriculum in Clinical Electrophysiology is to provide the clinician and trainee with an easily accessible body of current reviews, cases and Teaching Points that cover a broad range of the field. Links to the individual articles are provided to facilitate using this article as a spring board for review. Fundamentals of Electrophysiology, Mapping, Ablation, and ElectrocardiographyEmergence of complex behavior: An interactive model of cardiac excitation provides a powerful tool for understanding electric propagation. Spector PS, et al. 1 To facilitate an understanding of the relations between electrophysiologic properties and geometry that govern conduction, block and reentry, Spector and colleagues have developed an interactive model that allows the student to study the effects of varying parameters on conduction, block, reentry and even entrainment (http://circep.ahajournals.org/cgi/content/full/CIRCEP.110.961524/DC1). Munoz F, et al. 4 Teaching points with 3-dimensional mapping of cardiac arrhythmia: Mechanism of arrhythmia and accounting for the cycle length. Del Carpio Munoz F, et al. 5 Accurate activation sequence mapping of cardiac arrhythmias is a fundamental skill in cardiac electrophysiology. For complex arrhythmias an electroanatomic mapping system, which allows the mapping data to be displayed on a representation of the anatomy is often employed, as discussed in a series of articles Del Carpio Munoz and colleagues. [3][4][5][6] Accurate mapping requires selecting an appropriate reference point and mapping window and identification of the electrogram that indicates local activation. In applying a mapping strategy it is important to recognize features of macroreentrant, as compared to focal arrhythmias, and to recognize that seemingly small errors in assigning activation times, reference electrograms, or mapping windows, can render a map uninterpretable or meaningless. These issues are discussed in detail. Munoz F, et al. 6 Endocardial unipolar voltage mapping to detect epicardial ventricular tachycardia substrate in patients with nonischemic left ventricular cardiomyopathy. Hutchinson MD, et al. 7 Substrate mapping is a term that refers to localization of the likely arrhythmia substrate, during sinus or paced rhythm rather than during VT, and is of...

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Signals and Signal Processing for the Electrophysiologist

Cited by 30 publications

References 20 publications

ST-Segment Elevation Interpretation on Electrocardiogram

ST-Segment Elevation Interpretation on Electrocardiogram

Initial Experience with the BioSig PURE EP™ Signal Recording System: An Animal Laboratory Experience

Fundamental Concepts in Electrophysiology in Cases and Reviews

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