Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1993-11-23
1995-04-04
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607 14, 128705, A61N 137, A61N 139
Patent
active
054033527
ABSTRACT:
An automatic implantable device for detecting and differentiating between tachyarrhythmias in order to therapeutically stimulate the heart in response thereto, particularly for distinguishing fibrillation from tachycardia and to provide appropriate therapies for each condition. The event intervals between successive heart depolarizations are measured, stored and classified as within fibrillation or tachycardia interval ranges. The numbers of intervals falling within the fibrillation and tachycardia interval ranges are employed to distinguish fibrillation from tachycardia. The number of intervals required to detect and discriminate between tachycardia and fibrillation in situations where the tachyarrhythmia includes intervals in both interval ranges is reduced by adjusting the interval ranges as a function of the relative distribution of measured intervals within the interval ranges.
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Duthler Reed A.
Kamm William E.
Medtronic Inc.
Patton Harold R.
Schaetzle Kennedy J.
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