Abstract: A process for the treatment of atrial arrhythmia by use of ablation procedures comprising circumferential ablation of vessels, particularly pulmonary veins, associated with the left atrium of the heart. Also medical devices for such process including a pair of balloons secured to a catheter with one balloon located within the other balloon and an ablation catheter located within one of the balloons, which devices are used for the formation of a circumferential ablation lesion in the pulmonary vein.

Abstract: A guiding introducer system for use in the treatment of arrhythmia associated with the left ventricle from the ventricular side comprising an inner guiding introducer and an outer guiding introducer wherein the inner guiding introducer is comprised of a first and second section and the outer guiding introducer is comprised of a first and second sections. The guiding introducer system is for use in sensing, pacing, and ablating procedures in the left ventricle.

Abstract: A device for the mapping of cardiac arrhythmia foci including a catheter body having a distal tip, first and second point electrodes, which are secured to the catheter body and which form a first bipolar pair of electrodes, and third and fourth point electrodes, which are secured to the catheter body and which form a second bipolar pair of electrodes, wherein a line passing between the third and fourth point electrodes is within about 45 degrees of being perpendicular to a line passing through the first and second point electrodes.

Abstract: An ablation system for ablating cardiac tissue within a chamber of the human heart including a guiding introducer system, a rail, one end of which is contained within the guiding introducer system, and an ablation catheter system which is supported by the guiding introducer system. The guiding introducer system may be a single or multiple guiding introducers. The ablation system may include a slotted sheath which passes over the rail which supports the ablation catheter. A process is disclosed for ablation of cardiac tissue to form a linear lesion utilizing a rail catheter ablation and mapping system which includes a guiding introducer, a rail and an ablation catheter system advanced over the rail.

Abstract: A process for the mapping and/or ablation of accessory pathways around the mitral valve using a retrograde approach by use of ablation and/or mapping catheters guided by precurved guiding introducers. Also disclosed are shapes for the guiding introducers to be used for the ablation and/or mapping of the accessory pathways around the mitral valve using a retrograde approach.

Abstract: A process for the treatment of atrial arrhythmia by use of ablation procedures comprising circumferential ablation of vessels, particularly pulmonary veins, associated with the left atrium of the heart. Also medical devices for such process including a pair of balloons secured to a catheter with one balloon located within the other balloon and an ablation catheter located within one of the balloons, which devices are used for the formation of a circumferential ablation lesion in the pulmonary vein.

Abstract: A guiding introducer system for use in the treatment of arrhythmia associated with the left ventricle from the ventricular side comprising an inner guiding introducer and an outer guiding introducer wherein the inner guiding introducer is comprised of a first and second section and the outer guiding introducer is comprised of a first and second sections. The guiding introducer system is for use in sensing, pacing, and ablating procedures in the left ventricle.

Abstract: A process for the treatment of atrial arrhythmia by use of ablation procedures including circumferential ablation of vessels, particularly pulmonary veins, associated with the left atrium of the heart. Also medical devices for such process including a pair of balloons secured to a catheter with one balloon located within the other balloon and an ablation catheter located within one of the balloons, which devices are used for the formation of a circumferential ablation lesion in the pulmonary vein.

Abstract: A process for the mapping and/or ablation of accessory pathways around the mitral valve using a retrograde approach by use of ablation and/or mapping catheters guided by precurved guiding introducers. Also disclosed are shapes for the guiding introducers to be used for the ablation and/or mapping of the accessory pathways around the mitral valve using a retrograde approach.

Abstract: A guiding introducer system for use in the treatment of arrhythmia associated with the left ventricle from the ventricular side comprising an inner guiding introducer and an outer guiding introducer wherein the inner guiding introducer is comprised of a first and second section and the outer guiding introducer is comprised of a first and second sections. The guiding introducer system is for use in sensing, pacing, and ablating procedures in the left ventricle.

Abstract: An ablation system for ablating cardiac tissue within a chamber of the human heart including a guiding introducer system, a rail, one end of which is contained within the guiding introducer system, and an ablation catheter system which is supported by the guiding introducer system. The guiding introducer system may be a single or multiple guiding introducers. The ablation system may include a slotted sheath which passes over the rail which supports the ablation catheter. A process is disclosed for ablation of cardiac tissue to form a linear lesion utilizing a rail catheter ablation and mapping system which includes a guiding introducer, a rail and an ablation catheter system advanced over the rail.

Abstract: A process for the treatment of atrial arrhythmia by use of ablation and/or mapping procedures comprising ablating ablation tracks within the left and right atrium of the heart by use of precurved left and right atrium guiding introducers, including preferably a guiding introducer system for use in the left atrium comprising an inner and an outer guiding introducer. Also disclosed are shapes for the guiding introducers and the guiding introducer system to be used for the ablation and/or mapping of the discrete tracks within the left and right atrium.

Abstract: A process for the treatment of ectopic atrial tachycardia by use of ablation and/or mapping procedures comprising ablating discrete locations within the right atrium of the heart by use of an ablation catheter and a precurved guiding introducer. Also disclosed is a shape for the guiding introducer to be used for the ablation and/or mapping of the discrete locations within the right atrium for the treatment of ectopic atrial tachycardia.

Abstract: A process for the treatment of ventricular tachycardia in the left ventricle using a retrograde approach by use of ablation and/or mapping catheters guided by precurved guiding introducers. Also disclosed are predetermined shapes for the guiding introducers to be used for the treatment of ventricular tachycardia in the left ventricle using a retrograde approach.

Abstract: A process for the mapping and/or ablating of accessory pathways around the mitral valve using a retrograde approach by use of ablating and/or mapping catheters guided by a guiding introducer system. Also disclosed are shapes for an inner and outer guiding introducers which comprise the guiding introducer system.

Abstract: A process for the treatment of atrial flutter and/or atrial fibrillation in the right atrium by use of an ablating and/or mapping catheters guided by a guiding introducer. Also disclosed is a predetermined shape for the guiding introducer for use in the treatment of atrial flutter and/or atrial fibrillation in the right atrium.

Abstract: A guiding introducer system for use in the right atrium comprised of an inner guiding introducer and an outer guiding introducer wherein the inner guiding introducer is comprised of a first and second section and the outer guiding introducer is comprised of a first, second and third section. The guiding introducer system is for use in sensing, pacing, and ablating procedures within the right atrium of the human heart.

Abstract: A process for the treatment of ventricular tachycardia in the left ventricle using a retrograde approach by use of ablating and/or mapping catheters guided by a guiding introducer system. Also disclosed are predetermined shapes for an inner and outer guiding introducers which comprise the guiding introducer system.

Abstract: A process for the mapping and/or ablation of locations within the right ventricle associated with the right ventricular outflow tract for the treatment of ventricular tachycardia by use of ablation and/or mapping catheters guided by guiding introducers. Also disclosed are shapes for the guiding introducer to be used for the ablation and/or mapping of areas within the right ventricle associated with the right ventricular outflow tract for the treatment of ventricular tachycardia.

Abstract: A guiding introducer system for use in the treatment of arrhythmia associated with the left ventricle from the ventricular side comprising an inner guiding introducer and an outer guiding introducer wherein the inner guiding introducer is comprised of a first and second section and the outer guiding introducer is comprised of a first and second sections. The guiding introducer system is for use in sensing, pacing, and ablating procedures in the left ventricle.