Catheter location system and method

摘要: A system and method are provided for catheter location mapping, related procedures. Three substantially orthogonal alternating signals applied through the patient, directed toward area of interest to be mapped, such as patient's heart. The currents preferably constant current pulses, a frequency magnitude avoid disruption with ECG recordings. is equipped at least measuring electrode, which cardiac procedures positioned various locations either against heart wall, or within coronary vein artery. voltage sensed between tip reference surface electrode on signal has components corresponding three signals. processing channels used separate out x, y z signals, from calculations made determination three-dimensional body. An easy calibration procedure, can performed separately during calibrate provide correlations respective sense dimensional locations. procedure particularly applicable mapping prior ablation, repositioning precise desired ablations. also other techniques where position must remembered re-found accuracy, in stenosis and/or placing stents. Although invention provides greatest benefit 3-dimensional applications, it useful one two applications.