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AI Biotech/Diagnostics: Cardio
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Patent US10624551
Issued 2020-04-21
Insertable Cardiac Monitor For Use In Performing Long Term Electrocardiographic Monitoring
Long-term electrocardiographic and physiological monitoring over a period lasting up to several years in duration can be provided through a continuously-recording subcutaneous insertable cardiac monitor (ICM). The sensing circuitry and the physical layout of the electrodes are specifically optimized to capture electrical signals from the propagation of low amplitude, relatively low frequency content cardiac action potentials, particularly the P-waves that are generated during atrial activation and storing samples of captured signals. In general, the ICM is intended to be implanted centrally and positioned axially and either over the sternum or slightly to either the left or right of the sternal midline in the parasternal region of the chest.
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- 1. An insertable cardiac monitor (ICM) for use in performing long term electrocardiographic (ECG) monitoring, comprising:
an implantable housing comprised of a biocompatible material that is suitable for implantation within a living body; at least one pair of ECG sensing electrodes provided on a ventral surface and on opposite ends of the implantable housing; and electronic circuitry provided within the housing, comprising:
an ECG front end circuit interfaced to a low-power microcontroller and configured to capture cardiac action potentials sensed by the at least one pair of ECG sensing electrodes which are output as ECG signals;
the low power microcontroller configured to execute under modular micro program control as specified in firmware, the microcontroller configured to read samples of the ECG signals, buffer the samples of the ECG signals, compress the buffered samples of the ECG signals, buffer the compressed samples of the ECG signals, and write the compressed buffered samples into a non-volatile flash memory; and
the non-volatile memory electrically interfaced with the microcontroller and configured to store the written samples of the ECG signals.
- 10. A subcutaneous implantable loop recorder for long term electrocardiographic (ECG) monitoring, comprising:
a hermetically sealed implantable housing defining a rectangular shape with rounded edges and comprised of a biocompatible material that is suitable for implantation within a living body of a patient; at least one pair of ECG sensing electrodes provided on a ventral surface and on opposite ends of the implantable housing; electronic circuitry provided within the housing, the electronic circuitry comprising:
an ECG front end circuit interfaced to a low-power microcontroller and configured to capture cardiac action potentials sensed by the at least one pair of ECG sensing electrodes which are output as ECG signals;
the low power microcontroller configured to execute under modular micro program control as specified in firmware, the microcontroller configured to read samples of the ECG signals, buffer the samples of the ECG signals, compress the buffered samples of the ECG signals, buffer the compressed samples of the ECG signals, and write the compressed buffered samples into a non-volatile flash memory; and
the non-volatile memory electrically interfaced with the microcontroller and configured to store the written samples of the ECG signals.
