Cardiac Pacemakers, Inc.

Laura Mepham

Qingsheng Zhu

Jesse W Hartley

Geng Zhang

Michael J Lyden

Scott M Freeberg

Oingsheng Zhu

A method and apparatus for automatically adjusting the sensing threshold of cardiac rhythm management devices. The invention is particularly suited for implementation in devices such as implantable cardiac pacemakers and implantable cardioverter/defibrillators. A method and apparatus are provided in which a noise level and signal level for a sensing channel are determined for each cardiac cycle with the sensing threshold of the channel being adjusted in accordance therewith.

Method and apparatus for adjusting the sensing threshold of a cardiac rhythm management device

An implantable cardiac rhythm management device operable in an autothreshold or autocapture verification mode, wherein the rhythm management device is capable of detecting noise that affects signal characteristics of a sensed intracardial evoked response electrogram signal. The device includes a noise detection circuit that determines whether a minimum peak timing occurs during a predetermined time following delivery of a stimulation pulse. If a minimum peak timing occurs during the predetermined time following delivery of the stimulation pulse, then significant amounts of noise affecting the signal characteristics of the electrocardiogram signal is assumed.

Cardiac management device with capability of noise detection in automatic capture verification

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Shoreview, MN, United States of America

Laura Mepham