Electroanatomic imaging using magnetic catheter tracking in the diagnosis and treatment of atrial arrhythmias

Recent data emphasize the importance of structural factors in the pathophys iology of atrial arrhythmias. As a consequence, catheter ablation increasin gly has become an anatomically oriented procedure. A recently developed mag netic catheter tracking system provides spatially precise and realistic thr ee-dimensional reconstructions of endocardial geometry. A variety of electr ophysiologic data can be superimposed on these reconstructions, including a ctivation sequence, electrogram amplitude and morphologic features, respons e to pacing maneuvers, and sites of planned or delivered radiofrequency ene rgy ablation. These features enhance the ability to analyze and visualize a rrhythmia mechanisms, plan and execute appropriate ablation strategies, and provide new opportunities for physiologic research.