초록 ▼

A system for recording trigger events and noise in conjunction with the recording of physiological signals is provided for use in an implantable medical device. In one embodiment, recorded trigger and noise data is provided for display to a physician along with reconstructed ECG data to facilitate i

A system for recording trigger events and noise in conjunction with the recording of physiological signals is provided for use in an implantable medical device. In one embodiment, recorded trigger and noise data is provided for display to a physician along with reconstructed ECG data to facilitate interpretation of the ECG signal. In one embodiment, digitized ECG samples that are outside of a predetermined range are discarded during the sampling process so that one or more ranges of encoded values are available for use in encoding noise and trigger information. This non-physiologic data may be limited in size to individual point values of the ECG signal.

대표청구항 ▼

1. An implantable medical device (IMD) comprising electrodes suitable for chronic contact with internal tissue in a living body so as to receive physiologically originated electrical signals via said contact, said IMD having a hermetically sealed housing and at least one conductor inside said housin

1. An implantable medical device (IMD) comprising electrodes suitable for chronic contact with internal tissue in a living body so as to receive physiologically originated electrical signals via said contact, said IMD having a hermetically sealed housing and at least one conductor inside said housing, and wherein said electrodes are connected to provide said physiologically originated electrical signals to said at least one conductor inside said housing, said IMD further comprising:an ECG sensing circuit inside said housing for receiving said physiologically originated electrical signals from said at least one conductor and for generating ECG sample signals having values representative of a feature in said physiologically originated electrical signals at a sampling rate; an activation triggering circuit inside said housing also in electrical connection to said at least one conductor, for sensing a triggering event and for generating and providing as output, a trigger signal in the presence of triggering events; a memory circuit connected to receive data signals and to store or retrieve said data signals under control of a processor circuit; said processor circuit for reacting to said trigger signal to initiate storage into said memory of a group ECG sample signal in said ECG sample signals and said trigger signal such that said trigger signal replaces at least one of said group of ECG sample signals.