Expandable Lattice Electrode Ablation Catheter

Electrode catheter ablation of refractory focal ventricular tachycardia.

Localized, high energy, direct current intracardiac shocks effectively prevented recurrent ventricular tachycardia in one patient whose arrhythmia originated in the right ventricular outflow tract, and in two patients with ventricular septal tachycardia after myocardial infarction.

Nimbus Electrosurgical RF Multi-tined Expandable Electrode

Catheter Ablation for Tachycardias

T ACHY ARRHYTHMIAS constitute a major cause of mortality and morbidity. The most serious manifestation of cardiac arrhythmia is sudden cardiac death where the underlying rhythm is ventricular tachycardia-ventricular fibrillation (VT VF) in the vast majority of patients. I Other symptoms produced by cardiac arrhythmias are syncope, near syncope, lightheadedness, and palpitations. Although suprav...

The use of the multi-electrode duty-cycled radiofrequency ablation catheter PVAC for the ablation of a left atrial tachycardia.

The multi-electrode ablation catheter PVAC is used to simplify pulmonary vein isolation in patients undergoing ablation of atrial fibrillation. The use of the PVAC in cases of atrial tachycardia has not been reported before. In the present report, we present the use of the PVAC for the ablation of a left atrial tachycardia following pulmonary vein isolation. This case may suggest that the PVAC ...

Implications for Catheter Ablation

Background. The primary mechanism of tissue injury by radiofrequency catheter ablation is presumed to be thermally mediated. However, the myocardial cellular electrophysiological effects of hyperthermia are not well characterized. We used an in vitro model of isolated guinea pig right ventricular papillary muscle to investigate the acute cellular electrophysiological effects of hyperthermia. Me...