Determining the rhythm of the spontaneous depolarization of the

Details Determining the rhythm of the spontaneous depolarization of the Determining the rhythm of the spontaneous depolarization of the

1998-10-06

2000-11-21

Kamm, William E.

Surgery

Diagnostic testing

Cardiovascular

A61N 50402

Patent

active

061496014

ABSTRACT:
An active implantable medical device, particularly a cardiac pacemaker, defibrillator and/or cardiovertor capable of detecting the spontaneous depolarisation of the myocardium and determining the instant of its occurrence, which device detects the spontaneous depolarisation (10) of the myocardium through processing of a cardiac signal (E), delivers an information (t) of occurrence of a depolarisation and conditionally discriminates, preferably during consecutive limited time intervals ([t-50, t+200]), a unique characteristic of the cardiac signal giving a temporal information (T.sub.1, T.sub.2, T.sub.3) on the instant of occurrence of the depolarisation. The unique characteristic can particularly be a predetermined singularity of the cardiac signal such as an extreme, particularly the extreme negative, of the first derivative (dE/dt) of the cardiac signal.

REFERENCES:
patent: 5273049 (1993-12-01), Steinhaus et al.
Edward V. Simpson et al., "An Automatic Activation Detector for Bipolar Cardiac Electrograms", Cardiology and Imaging, New Orleans, LA, Nov. 4-7, 1988, pp. 113-114.
M. Kirhner et al., "Real-Time Interval Measruement During Invasive Cardiac Electrophysiologic Testing", Proceedings of the Computers In cardiology Meeting, Leuven, Belgium, Sep. 12-15, 1987, pp. 93-96.

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