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Abstract

An electrode catheter is provided for ablation of arrhythmogenic tissue in a malperforming heart and includes an elongated catheter tube having longitudinally spaced apart proximal and distal ends. At least one electrode for ablation of the arrhythmogenic tissue in a targeted region of the patient is carried on the catheter tube, preferable at or proximate the distal end of the catheter tube. One such electrode may be located at the distal tip of the catheter and configured in the shape of a generally flat disk that substantially conforms to the contour of the targeted region and such that the ratio of the surface area of the tissue-contacting end face to that of a side wall portion of the electrode is greater than 1.0. A conductor is arranged through the elongated catheter tribe and is coupled with the electrode at the distal end, while an energy source is electrically coupled to the conductor at the proximal end of the catheter tube for supplying energy to the electrode for ablation of the arrhythmogenic tissue. A temperature sensor is disposed in the electrode for dynamically sensing the temperature of the targeted region and for use in controlling the amount Of energy supplied to the electrode tip to maintain a predetermined temperature at the targeted region.

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First Claim