05109842 is referenced by 174 patents and cites 2 patents.

An implantable tachyarrhythmia control system includes a patch electrode having a sensor integrated therein, such as a piezoelectric sensor, which is capable of monitoring mechanical heart activity. When the patch electrode is sutured to the cardiac tissue, the piezoelectric sensor will be deformed due to the mechanical activity of the heart muscle, and will generate a corresponding electrical signal. The electrical signal from the sensor will exhibit relatively low-frequency periodicity and relatively low amplitude during normal heart activity. In the event of tachycardia or fibrillation, the signal will exhibit excursions beyond those occurring for normal heart activity, and will consequently have a higher energy content. The signal is thus an indicator for the onset of these cardiac events. The signal can be supplied to an implantable defibrillator and can be used as a primary or secondary trigger for initiating defibrillation therapy, such as one or more defibrillating pulses. The signal may alternatively be supplied to an implantable combination pacemaker/defibrillator, which also undertakes standard R-wave detection via a conventional pacing lead. The signal from the patch electrode sensor can be used as before as a primary or secondary trigger to initiate defibrillation therapy alone or in combination with the detected R-wave signal. The patch sensor signal may also be used, alone or in combination with the R-wave signal, to initiate a change in the pacing mode or to initiate a particular pacing therapy, such as an antitachycardia sequence.

Title
Implantable tachyarrhythmia control system having a patch electrode with an integrated cardiac activity system
Application Number
7/587282
Publication Number
5109842
Application Date
September 24, 1990
Publication Date
May 5, 1992
Inventor
David W Adinolfi
Santa Clarita
CA, US
Agent
Lisa P Weinberg
Leslie S Miller
Assignee
Siemens Pacesetter
CA, US
IPC
A61N 1/39
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