Apparatus for discrimination of ventricular tachycardia...

Details Apparatus for discrimination of ventricular tachycardia... Apparatus for discrimination of ventricular tachycardia...

A - Human Necessities

61

N

A61N 1/365 (2006.01) A61N 1/362 (2006.01) A61N 1/39 (2006.01)

Patent

CA 2102493

2102493 9320888 PCTABS00027 An implantable cardioverter (100) including apparatus for measuring the width of a patient's R-wave in order to determine whether or not to deliver an antitachycardia therapy. The means for measuring the width of the R-wave comprises a digitizing means for converting electrical signals from the ventricle to digital signals and means for analyzing the digitized signals to determine the end points of sensed R-waves. End points are identified in response to the occurrence of a series of sequential digitized signals which differ from preceeding signals by more than a predetermined amount (T), and the width of the R-wave is defined as the interval between the first such identified end point (A) associated with a detected R-wave and the last such detected end point (G) associated with the same detected R-wave.

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