Diagnosis and ablation of focal right atrial tachycardia using a new high-resolution, non-contact mapping system

Schmitt, H; Weber, Stefan; Schwab, Joerg O.; Voss, R.; Kneller, Ralf; Tillmanns, Harald; Waldecker, Bernd

doi:10.1016/s0002-9149(01)01453-9

Cited by 33 publications

(16 citation statements)

References 15 publications

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“…Regardless of the underlying mechanism, FAT can be eliminated by catheter ablation in most patients 4–12 . Mapping studies performed in patients with FAT provided insight into the electrophysiological characteristics.…”

Section: Introductionmentioning

confidence: 99%

Fragmented, Long‐Duration, Low‐Amplitude Electrograms Characterize the Origin of Focal Atrial Tachycardia

Groot¹,

Schalij²

2006

Cardiovasc electrophysiol

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Section: Introductionmentioning

confidence: 99%

Fragmented, Long‐Duration, Low‐Amplitude Electrograms Characterize the Origin of Focal Atrial Tachycardia

Groot¹,

Schalij²

2006

Cardiovasc electrophysiol

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“…The EnSite mapping system in this case demonstrated findings compatible to their results ( Figure 2A). Schmitt et al 6) emphasized the feasibility of the EnSite system in ten cases of AT ablation arising from RA. However, they did not apply RF current in two cases to the foci located in the anterosuperior RA which is in sinus node area.…”

Section: Discussionmentioning

confidence: 99%

Noncontact Mapping-Guided Catheter Ablation of Posterosuperior Right Atrial Tachycardia Associated with Sick Sinus Syndrome

et al. 2008

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Focal atrial tachycardia (AT) is sometimes associated with sick sinus syndrome. A 57-yearold female complained of palpitation, fatigue and presyncope. Ambulatory monitoring demonstrated frequent segments of AT and subsequent sinus arrests. P wave morphology of ectopic beats was similar to that of sinus rhythm. After obtaining diagnosis of bradycardia tachycardia syndrome, she underwent electrophysiologic study (EPS) and radiofrequency (RF) catheter ablation to eliminate AT.Conventional EPS could not be performed due to frequent spontaneous ectopic beats. EnSite mapping demonstrated that AT originates from posterosuperior right atrium (RA) and that local electrogram of ectopic focus precedes the onset of P wave in surface ECG by 40 msec. After EnSite-guided RF ablation to the target area, ambulatory monitoring detected no AT or sinus arrest. EPS performed one week after RF ablation showed atropine-induced partial restoration of sinus node dysfunction.Her symptoms were resolved remarkably and permanent pacemaker implantation has not been necessary to date. RF ablation guided by EnSite mapping was useful to eliminate AT arising from limited ectopic focus and this case implies existence of ''pacemaker-avoidable'' bradycardia tachycardia syndrome. (J Arrhythmia 2008; 24: 33-37)

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“…[11][12][13] These devices are of course very helpful in the rapid determination of the tachycardia origin and reduction of fluoroscopic time. On the other hand, these techniques can sometimes be time-consuming.…”

Section: Discussion Main Findingsmentioning

confidence: 99%

Atrial Unipolar Potential in Radiofrequency Catheter Ablation of Atrial Tachycardia

et al. 2007

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SUMMARYWe conducted this study to verify the efficacy of atrial unipolar potentialfor for ablation of atrial tachycardia. The morphology of atrial unipolar potential at the successful and the best unsuccessful ablation sites was analyzed in 35 patients with atrial tachycardia (sino-atrial reentrant tachycardia (SART) 15, adenosine-sensitive atrial reentrant tachycardia near the His bundle (HAT) 10, and non-reentrant ectopic atrial tachycardia (EAT) 10). The usefulness of atrial unipolar potential was compared with the Ao-Po interval. The incidences of QS pattern at the successful and the best unsuccessful sites were (successful versus unsuccessful; P, respectively) 93 versus 55%; P = 0.20 in SART, 90 versus 0%; P = 0.0001 in HAT, and 90 versus 10%; P = 0.001 in EAT. The mean Ao-Po intervals at the successful and the best unsuccessful sites were 35 versus 30 ms; NS in SART, 48 versus 45 ms; NS in HAT, and 58 versus 50 ms; NS in EAT. A significantly higher incidence of transient success at QS pattern sites was observed in SART than in HAT or EAT (n = 2 ± 0.8 versus 0.2 ± 0.1 and 0.1 ± 0.1, P = 0.0005), and each transient site and final success site in SART was distributed linearly. The sensitivity and specificity of QS patterns with regard to the determination of appropriate target sites were 0.91 and 0.45 in SART, 0.9 and 1.0 in HAT, and 0.88 and 0.88 in EAT, respectively. In ablation of HAT and EAT, the QS pattern is very useful and should be given high priority when determining the optimum target site. In SART, the ablation success was often achieved by multiple, linear RF delivery near perinodal tissue, and the QS pattern could be a candidate for the optimum target site. (Int Heart J 2007; 48: 313-322)

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Diagnosis and ablation of focal right atrial tachycardia using a new high-resolution, non-contact mapping system

Cited by 33 publications

References 15 publications

Fragmented, Long‐Duration, Low‐Amplitude Electrograms Characterize the Origin of Focal Atrial Tachycardia

Fragmented, Long‐Duration, Low‐Amplitude Electrograms Characterize the Origin of Focal Atrial Tachycardia

Noncontact Mapping-Guided Catheter Ablation of Posterosuperior Right Atrial Tachycardia Associated with Sick Sinus Syndrome

Atrial Unipolar Potential in Radiofrequency Catheter Ablation of Atrial Tachycardia

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