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Advanced technology—for difficult to map arrhythmias

The   3000® System provides a global, simultaneous view of arrhythmia activation. Because it offers a complete view of an entire heart chamber, the system allows a physician to rapidly diagnose rhythms that are not easily mapped—or impossible to map—with conventional technology.

Unstable patients
Patients with rapid rhythms, particularly those with hemodynamic compromise, cannot tolerate their arrhythmias during conventional mapping. Non-contact mapping allows the clinician to induce the arrhythmia, record several cycles, and then treat the arrhythmia during normal sinus rhythm.

Physician Observation:
“Applications of RF were delivered during NSR because of difficulties of induction or hemodynamic tolerance. RF applications during NSR at 11 sites rendered 17 previously inducible tachycardias noninducible.” 1

Non-sustained rhythms
Patients may be significantly affected by transient rhythms, but the rhythms themselves may not be sustained long enough for conventional evaluation. The   3000 System gives physicians the ability to effectively map an arrhythmia from just a few beats.

Physician Observations:
“This system provides anatomically accurate endocardial isopotential mapping during a single cardiac cycle.” 2

“Despite its short duration, the tachycardia could be characterized in a single-beat.” 3

Polymorphic rhythms
Arrhythmias with multiple pathway or exit points may be impossible to map with ordinary methods. Noncontact mapping reveals distinctions between multiple tachycardias—such as shared and independent pathways and concealed conduction pathways. And unlike point-to-point mapping with electroanatomic technology, if an arrhythmia changes during a study, the noncontact map does not have to be recreated. Multiple arrhythmias can be recorded from a single geometry.

Physician Observation:
“Noncontact mapping provides a 3D construction of atrial geometry, instant mapping of entire endocardial activation without the need for catheter contact, reconstruction of unipolar electrograms at any site on the endocardial surface, the ability to map multiple arrhythmias without rebuilding chamber geometry, and a locator signal that can be applied to any conventional catheter to determine its position. All of these features contributed to successful mapping of intra-arterial reentry tachycardia in our patients.” 4

References
1. Schilling RJ, Chow, AW, Peters NS, Davies WD. Radiofrequency ablation of ventricular tachycardia during sinus rhythm in patients with coronary heart disease. Circulation. 1998.; 98: I-347.
2. Gornick CC, Adler SW, Pederson B, Hauck J, Budd J, Schweitzer J. Validation of a new noncontact catheter system for electroanatomic mapping of left ventricular endocardium. Circulation. 1999; 99:829-835.
3. Peters NS, Jackman WM, Schilling RJ, Beatty G, Davies W. Human left ventricular endocardial activation mapping using a novel noncontact catheter. Circulation. 1007;95:1658-1660.
4. Betts TR, Roberts PR, Allen SA, Salmon AP, Keeton BR, Haw MP, Morgan JM. Electrophysiological mapping and ablation of intra-atrial reentry tachycardia after fontan surgery with the use of a noncontact mapping system. Circulation. 2000; 102:419-425.


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