The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 1995
Filed:
Jan. 08, 1993
Bruce N Goldreyer, Rancho Palos Verdes, CA (US);
Other;
Abstract
Accurate mapping of electrophysiologic activation within the human heart is achieved for discrete areas within the heart by utilizing a catheter having at least one pair of orthogonal sensors disposed on the catheter. Orthogonal sensors, which are comprised of two or more electrodes generally disposed circumferentially on the catheter at given longitudinal position along the catheter, receive signals which are differenced within a differential amplifier to produce a signal indicative only of the localized or near field biopotential heart activity. The orthogonal sensors are disposed adjacent to the stimulating tip of the catheter to allow sensing of the localized cardiac activity which is adjacent to or in contact with the stimulating tip during pacing procedures or during the delivery of radio frequency energy during ablation. Sensing of the localized cardiac activity occurs simultaneously either with the pacing or the ablation so that detailed and accurate electrocardiograms of the stimulated or ablated tissue region can be recorded. A plurality of such a orthogonal sensors longitudinally disposed along the body of the catheter with spacings between each of them of 1-3 millimeters allows for simultaneous mapping of localized cardiac activation at a corresponding plurality of positions within the heart wall even when physical contact between the sensing electrodes and heart wall does not or cannot occur.