Implantable cardiac defibrillator employing bipolar sensing and

Details Implantable cardiac defibrillator employing bipolar sensing and Implantable cardiac defibrillator employing bipolar sensing and

1983-03-23

1986-09-30

Kamm, William E.

Surgery

Truss

Pad

128419PG, A61N 136

Patent

active

046141928

ABSTRACT:
An implantable cardioversion system employing a bipolar electrode for R-wave sensing, the system utilizing heart rate averaging and probability density function techniques in determining whether or not the heart of a patient is to be automatically cardioverted. An improved bipolar electrode facilitates acquisition of a highly accurate R-wave. The implantable system is further provided with the capabilities of (1) providing, upon magnet-type interrogation, an audible indication of proper placement of the bipolar electrode in the body of a patient, (2) providing an audible indication to verify the status of the implanted device (activated or deactivated), (3) the capability of providing, upon request, a transmitted signal modulated with stored information corresponding to the number of times cardioversion of the patient has taken place, (4) the capability of preventing external cardioversion shock from being shunted across the electrodes, and (5) the capability of detecting average heart rate.

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