IMPLANTABLE MEDICAL DEVICE SENSING WIRELESS ECG AS SUBSTITUTE FOR INTRACARDIAC ELECTROGRAM
First Claim
Patent Images
1. A cardiac rhythm management (CRM) system, comprising:
- an implantable medical device including;
a primary sensing circuit including an electrogram sensing circuit to sense an intracardiac electrogram;
an auxiliary sensing circuit including a wireless electrocardiogram (ECG) sensing circuit to sense a subcutaneous ECG;
a processing circuit having an input to receive a first signal being one of the intracardiac electrogram and the subcutaneous ECG;
a switch circuit coupled to the input of the processing circuit, the switch circuit configured to receive a selection signal and to connect the input of the processing circuit to one of the primary sensing circuit and the auxiliary sensing circuit according to the selection signal; and
a selection circuit coupled to the switch circuit, the selection circuit adapted to produce the selection signal; and
a plurality of implantable subcutaneous electrodes coupled to the auxiliary sensing circuit.
0 Assignments
0 Petitions
Accused Products
Abstract
A cardiac rhythm management (CRM) system includes an implantable medical device that senses a wireless electrocardiogram (ECG), which is a signal sensed with implantable electrodes and approximating a surface ECG. In one embodiment, the wireless ECG is sensed as a substitute signal for the intracardiac electrogram when the sensing of the intracardiac electrogram becomes unreliable.
148 Citations
20 Claims
-
1. A cardiac rhythm management (CRM) system, comprising:
-
an implantable medical device including;
a primary sensing circuit including an electrogram sensing circuit to sense an intracardiac electrogram;
an auxiliary sensing circuit including a wireless electrocardiogram (ECG) sensing circuit to sense a subcutaneous ECG;
a processing circuit having an input to receive a first signal being one of the intracardiac electrogram and the subcutaneous ECG;
a switch circuit coupled to the input of the processing circuit, the switch circuit configured to receive a selection signal and to connect the input of the processing circuit to one of the primary sensing circuit and the auxiliary sensing circuit according to the selection signal; and
a selection circuit coupled to the switch circuit, the selection circuit adapted to produce the selection signal; and
a plurality of implantable subcutaneous electrodes coupled to the auxiliary sensing circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method, comprising:
-
sensing an intracardiac electrogram through an implantable lead;
detecting a failure signal indicating a failure in sensing the intracardiac electrogram; and
sensing a subcutaneous electrocardiogram (ECG) as a substitute for the intracardiac electrogram if the failure signal is detected. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
Specification