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:
Nov. 17, 1981
Filed:
Feb. 11, 1980
Steve Kolenik, Leechburg, PA (US);
Alois A Langer, Pittsburgh, PA (US);
Other;
Abstract
A method and apparatus for effecting automatic ventricular defibrillation and/or demand cardioversion comprises an implanted automatic defibrillator having a normal (ventricular defibrillation) mode of operation and a cardioverting (demand cardioversion) mode of operation. One embodiment of the invention includes a simulated fibrillation source, externally located, for applying a simulated fibrillation signal to the patient via corresponding electrodes, the internal automatic defibrillator detecting the simulated fibrillation signal and responding thereto so as to apply a defibrillating voltage (in the normal mode) or a cardioverting voltage (in the cardioverting mode) to the heart of the patient. Another embodiment of the invention also includes an external command system, by means of which the implanted automatic defibrillator is actuated from the normal mode to the cardioverting mode, to reduce the discharge energy level, to cardiovert in synchronization with the QRS complex, or both.