Implantable cardiac device having event recording capability wit

Details Implantable cardiac device having event recording capability wit Implantable cardiac device having event recording capability wit

1999-02-22

2000-12-12

Getzow, Scott M.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A01B 50452

Patent

active

061610437

ABSTRACT:
An implantable cardiac device is disclosed having a converter that provides a digital electrocardiogram signal to a controller which is stored in memory or transmitted via the telemetry circuit in an improved compressed fashion. The improved compression scheme comprises sampling the electrogram signal, transmitting the starting value in an uncompressed format followed by a plurality of delta signals in a compressed format. The delta signals may be determined by subtracting successive signals or by subtracting a predicted value from the current value. In either case, the delta signal is then transmitted in a truncated number of bits, e.g., 2 or 4 bits. When the delta signal is too large to be represented in the compressed number of bits, the controller then provides an indicator signal followed by the delta signal in the uncompressed format. In addition, whenever successive delta signals are below a minimum threshold (e.g., zero), they may be compressed into a count.

REFERENCES:
patent: 4449536 (1984-05-01), Weaver
patent: 4567883 (1986-02-01), Langer
patent: 4633884 (1987-01-01), Imai
patent: 4716903 (1988-01-01), Hansen et al.
patent: 4802222 (1989-01-01), Weaver
patent: 4882754 (1989-11-01), Weaver et al.
patent: 4947858 (1990-08-01), Smith
patent: 5215098 (1993-06-01), Steinhaus et al.
patent: 5217021 (1993-06-01), Steinhaus et al.
patent: 5263486 (1993-11-01), Jeffreys

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