Electrophysiology of Ventricular Tachycardia:

Josephson, Mark E.

doi:10.1046/j.1460-9592.2003.00320.x

Cited by 13 publications

(12 citation statements)

References 155 publications

(240 reference statements)

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“…5 Cardiac electrophysiology underwent developments in electrode techniques similar to those in neuro- 18 In cardiology, the development of endocardial catheter mapping provided localizing information regarding arrhythmogenic foci in the heart for subsequent ablation. 15 Likewise, in neurosurgery, minimally invasive endovascular techniques may become a tool for the evaluation of epileptogenic foci. 5,16,19,22 In cardiology, catheter ablation proved to be efficacious in curing cardiac arrhythmia, 35 and it has been proposed that catheter ablation may be possible in epilepsy surgery.…”

Section: Discussionmentioning

confidence: 99%

The evolution of endovascular electroencephalography: historical perspective and future applications

Sefcik¹,

Opie

John

et al. 2016

FOC

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Current standard practice requires an invasive approach to the recording of electroencephalography (EEG) for epilepsy surgery, deep brain stimulation (DBS), and brain-machine interfaces (BMIs). The development of endovascular techniques offers a minimally invasive route to recording EEG from deep brain structures. This historical perspective aims to describe the technical progress in endovascular EEG by reviewing the first endovascular recordings made using a wire electrode, which was followed by the development of nanowire and catheter recordings and, finally, the most recent progress in stent-electrode recordings. The technical progress in device technology over time and the development of the ability to record chronic intravenous EEG from electrode arrays is described. Future applications for the use of endovascular EEG in the preoperative and operative management of epilepsy surgery are then discussed, followed by the possibility of the technique's future application in minimally invasive operative approaches to DBS and BMI.

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Section: Discussionmentioning

confidence: 99%

The evolution of endovascular electroencephalography: historical perspective and future applications

Sefcik¹,

Opie

John

et al. 2016

FOC

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“…The distribution of unipolar scar areas by multiple wavefronts is shown in Figure 3B. A median difference of 16 cm 2 (7.1-33 cm 2 ) was observed in scar area between different wavefronts in a given patient, representing 14% variability from median area. Discrepancies of >10 cm 2 in low-voltage areas <8.3 mV were observed in 59% (n=17) of patients ( Figure 4) Figure 5).…”

Section: Unipolar Low-voltage Comparisonmentioning

confidence: 98%

“…Using RV pacing as the index wavefront, the median unipolar low-voltage area <8.3 mV was 116 cm 2 (51-151 cm 2 ). The distribution of unipolar scar areas by multiple wavefronts is shown in Figure 3B.…”

Section: Unipolar Low-voltage Comparisonmentioning

confidence: 99%

“…In 6 patients who underwent epicardial mapping (lateral scar=3, inferior scar=3) with multiple wavefronts, the median low-voltage area <1.5 mV was 65 cm 2 (33-88 cm 2 ) with dense scar area of 25 cm 2 (18-32 cm 2 ) during RV pacing. Two patients had comparison of RV with intrinsic sinus rhythm and a median difference of 3.2 cm 2 of low-voltage area <1.5 cm 2 and 6.1 cm 2 of dense scar <0.5 mV, representing 4% and 19% variability in scar area, respectively.…”

Section: Epicardial Mappingmentioning

confidence: 99%

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Directional Influences of Ventricular Activation on Myocardial Scar Characterization

Tung

Josephson

Bradfield

et al. 2016

Circ: Arrhythmia and Electrophysiology

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“…(7,8) In these patients, substrate-based ablation based on sinus (or paced) rhythm maps remains the standard. Ripple mapping does have the potential to provide quick display of substrate map in sinus rhythm (especially identification of areas of slowed conduction, which typically have multi component electrograms).…”

Section: The Present Studymentioning

confidence: 99%

Ripple mapping: Making electroanatomic mapping user-friendly

Tung¹,

Shivkumar²

2009

Heart Rhythm

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With the introduction of electroanatomic mapping systems, electrical voltage maps of the chamber of interest and activation maps of arrhythmias have emerged as invaluable tools for successful ablation of focal and reentrant arrhythmias.(1) In reentrant rhythms that cause hemodynamic instability, substrate modification has been demonstrated to achieve meaningful results.(2,3) In arrhythmias where a scar serves as the substrate for reentry, activation maps and voltage maps must be acquired and displayed separately. During isochronal activation mapping, a fiduciary activation point is chosen and all mapped points are represented in relation to this reference. The inherent limitation in such mapping is in the assignment bias, where the subjective selection of an individual local potential within a multi-component electrogram can drastically alter a propagation map. Depending on whether the first component or last component of a split or multi-component potential is chosen, "early" activation can be made "late" and vice versa. The Present StudyIn this issue of the Journal, Linton and colleagues present a novel form of electroanatomic mapping called "ripple mapping", whereby voltage, timing, and location are simultaneously displayed with continuous display of electrograms that were previously sampled and 'postprocessed'. (4) The goals of this proof-of-concept study were to (i) simplify activation mapping by minimizing operator-dependence, (ii) eliminate interpolation of data between mapped points and (iii) to eliminate assignment bias by developing software to register continuous or fractionated electrograms, thereby removing a single, isolated local value as a representative of an entire coordinate. A large window was sampled, 500 ms before and after the QRS, and electrograms were time-gated and displayed as dynamic bars protruding from the surface changing in length and color depending on the local electrogram voltage-time relationship. With an analysis of sinus rhythm activation, three atrial tachycardias, and two ventricular tachycardias, the authors display ripple maps for arrhythmias due to reentrant mechanisms with successful ablation at sites of continuous activity in four of five patients.The outlined objectives were met and the videos demonstrate a more user friendly display of activation. However, several limitations must be noted. Although demonstrated in common arrhythmias, the application of this software to clinical practice is likely to be necessary only Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. 5,6). However, far field potentials will pose a challenge fo...

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Electrophysiology of Ventricular Tachycardia:

Cited by 13 publications

References 155 publications

The evolution of endovascular electroencephalography: historical perspective and future applications

The evolution of endovascular electroencephalography: historical perspective and future applications

Directional Influences of Ventricular Activation on Myocardial Scar Characterization

Ripple mapping: Making electroanatomic mapping user-friendly

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