Intermedics Inc.

Sulzer Intermedics, Inc.

Chris A Bonnerup

M Zafar Munshi

Edward A Schroeppel

Leo Rubin

John P Rosborough

Methods and apparatus for treating fibrillation utilize biphasic waveforms. A cardiac stimulator includes a defibrillation circuit that uses a pulse width modulated capacitive discharge to generate various biphasic waveforms, one or more of which may be delivered to the heart to treat the fibrillation.

Methods and apparatus for treating fibrillation and creating defibrillation waveforms

An implantable cardiac stimulator delivers a first electrical shock via implantable stimulating electrodes at a time when there is substantially no flow of blood. At least one of the stimulating electrodes is disposed in a blood flow path of the cardiovascular system. The first shock is of insufficient energy level to cause defibrillation. An electrical potential is measured as a function of time between the blood-contacting electrode and a reference electrode following delivery of the first shock to obtain a first potential equilibration function under no-flow conditions. A second therapeutic electrical shock, of sufficient energy level to effect defibrillation, is delivered via the stimulating electrodes. A second potential equilibration function is measured following delivery of the second shock. The first and second potential equilibration functions are compared, and if the two functions are sufficiently different in morphology, it is determined that blood is flowing.

Apparatus and method for discriminating flow of blood in a

The invention relates to an improved stimulation electrode for cardiac pacing and defibrillating, methods of manufacturing same, and methods of using same. Specifically, the electrodes of the invention by virtue of the methods of manufacturing and using, demonstrate improved capabilities of stimulating and sensing neuromuscular tissues. The electrodes have enhanced electrically-accessible surface areas which are coated with oxides of valve metals.

Implantable stimulation electrodes with non-native metal oxide coating

The invention relates to methods of making an improved stimulation electrode for cardiac pacing and defibrillating. Specifically, the electrodes of the invention by virtue of the methods of manufacturing and using, demonstrate improved capabilities of stimulating and sensing neuromuscular tissues. The electrodes have enhanced electrically-accessible surface areas which are coated with oxides of valve and noble metals.

Growing community of inventors

Houston, TX, United States of America

Chris A Bonnerup