Telectronics Pacing Systems, Inc.

Stephen G Wilson

Anthony C Stephens

An implantable cardioverting/defibrillating pacemaker and method for treating arrhythmias of a patient's heart are disclosed. Bradycardia support pacing is initially provided at a normal standby rate, in the absence of a tachycardia. Upon detection and confirmation of a tachycardia, antitachycardia therapy in the form of antitachycardia pacing pulse therapy and/or cardioversion or defibrillation therapy is delivered to the heart. Thereafter, upon reversion of the tachycardia, bradycardia support pacing is again delivered to the heart but at a greater rate than the earlier normal standby rate and only for a predetermined time period. At the end of such time period, the bradycardia support pacing rate is returned to the normal standby rate, either directly or in decremental steps.

Implantable pacemaker/cardioverter/defibrillator device and method

A method and apparatus for delivering electrical therapy to the heart are disclosed. The apparatus detects and confirms the arrhythmia. However, during confirmation, if the arrhythmia is present but not too severe, it is allowed to continue in the hope that it will spontaneously revert. The arrhythmia is reconfirmed later and, if it is still present, electrical therapy is delivered to the heart. Thus, for mild arrhythmias, electrical shock therapy is withheld for a specified time period in the hope that the arrhythmia will revert spontaneously. More severe arrhythmias which are not hemodynamically sustaining are immediately electrically shocked in an effort to revert the heart back to normal sinus rhythm.

Apparatus and method for controlling tachyarrhythmia confirmation in

A method and apparatus for treating tachycardias are disclosed which utilize tachycardia cycle lengths in connection with selecting the type of antitachycardia pacing to be used in such treatment. A range of tachycardia cycle lengths is selected for which antitachycardia pacing treatment is indicated. This range is divided into a plurality of sub-ranges of tachycardia cycle lengths, and corresponding storage locations are established for each of the tachycardia cycle length sub-ranges. Antitachycardia pacing parameters which have been successful in reverting previous tachycardias are stored in their corresponding storage locations, and subsequent tachycardias are treated using antitachycardia pacing parameters selected from storage locations that correspond to, or are closest to correspondence with, the storage locations corresponding to the tachycardias to be treated.

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Stanmore, Australia

Stephen G Wilson