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ensite navxtm  (St Jude Medical)
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St Jude Medical ensite navxtm
Figure 1 Displaying the use of the three different catheter location systems for mapping PSVT, all viewed from the LAO perspective. The top figure demonstrates the four diagnostic catheters positioned under fluoroscopic guidance for conventional mapping. A narrow spaced decapolar catheter is positioned at the His bundle and a wide spaced decapolar catheter in the coronary sinus. In the middle figure, the same four catheters have been posi- tioned under <t>Ensite</t> NavX guidance except that a quadripolar catheter is at the His bundle. In the lower figure, an electro-anatomic (Carto) ablation catheter has been used to delineate the His bundle (orange sphere), tricuspid annulus, and coronary sinus (pink tube) during pacing from the right ventri- cular apex. An endocardial geometry has been created in which the colours represent local atrial activation time after the ventricular pacing spike (the colour key on the right displays the timings). The earliest atrial activation can be seen at the superior tricuspid valve annulus close to the His bundle (fast pathway), consistent with normal retrograde atrial activation. This patient found to have atrioventricular re-entrant nodal tachycardia and a successful ablation (red sphere) was applied at the inferior tricuspid valve annulus (slow pathway). HRA, high right atrium; RVA, right ventricular apex; CS, coronary sinus.
Ensite Navxtm, supplied by St Jude Medical, used in various techniques. Bioz Stars score: 86/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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Figure 1 Displaying the use of the three different catheter location systems for mapping PSVT, all viewed from the LAO perspective. The top figure demonstrates the four diagnostic catheters positioned under fluoroscopic guidance for conventional mapping. A narrow spaced decapolar catheter is positioned at the His bundle and a wide spaced decapolar catheter in the coronary sinus. In the middle figure, the same four catheters have been posi- tioned under Ensite NavX guidance except that a quadripolar catheter is at the His bundle. In the lower figure, an electro-anatomic (Carto) ablation catheter has been used to delineate the His bundle (orange sphere), tricuspid annulus, and coronary sinus (pink tube) during pacing from the right ventri- cular apex. An endocardial geometry has been created in which the colours represent local atrial activation time after the ventricular pacing spike (the colour key on the right displays the timings). The earliest atrial activation can be seen at the superior tricuspid valve annulus close to the His bundle (fast pathway), consistent with normal retrograde atrial activation. This patient found to have atrioventricular re-entrant nodal tachycardia and a successful ablation (red sphere) was applied at the inferior tricuspid valve annulus (slow pathway). HRA, high right atrium; RVA, right ventricular apex; CS, coronary sinus.

Journal: European heart journal

Article Title: Radiofrequency ablation of arrhythmias guided by non-fluoroscopic catheter location: a prospective randomized trial.

doi: 10.1093/eurheartj/ehi834

Figure Lengend Snippet: Figure 1 Displaying the use of the three different catheter location systems for mapping PSVT, all viewed from the LAO perspective. The top figure demonstrates the four diagnostic catheters positioned under fluoroscopic guidance for conventional mapping. A narrow spaced decapolar catheter is positioned at the His bundle and a wide spaced decapolar catheter in the coronary sinus. In the middle figure, the same four catheters have been posi- tioned under Ensite NavX guidance except that a quadripolar catheter is at the His bundle. In the lower figure, an electro-anatomic (Carto) ablation catheter has been used to delineate the His bundle (orange sphere), tricuspid annulus, and coronary sinus (pink tube) during pacing from the right ventri- cular apex. An endocardial geometry has been created in which the colours represent local atrial activation time after the ventricular pacing spike (the colour key on the right displays the timings). The earliest atrial activation can be seen at the superior tricuspid valve annulus close to the His bundle (fast pathway), consistent with normal retrograde atrial activation. This patient found to have atrioventricular re-entrant nodal tachycardia and a successful ablation (red sphere) was applied at the inferior tricuspid valve annulus (slow pathway). HRA, high right atrium; RVA, right ventricular apex; CS, coronary sinus.

Article Snippet: This is possible, however, when the catheters are located by electrical fields (LocaLisaTM, Medtronic Inc., Minneapolis, MN, USA), which has also demonstrated reduced screening times.6,7 A further technology, Ensite NavXTM (St Jude Medical, St Paul, MN, USA), combines the ability to locate all catheters non-fluoroscopically and, if necessary, construct a three-dimensional geometry.

Techniques: Diagnostic Assay, Activation Assay