HEMODYNAMIC STABILITY ASSESSMENT BASED ON HEART SOUNDS
First Claim
1. A system comprising:
- an implantable medical device (IMD) comprising;
an implantable heart sound sensor operable to produce an electrical signal representative of at least one heart sound, the heart sound associated with mechanical activity of a patient'"'"'s heart;
a heart sound sensor interface circuit coupled to the heart sound sensor to produce a heart sound signal;
a tachyarrhythmia detector; and
a controller circuit coupled to the heart sound sensor interface circuit and the tachyarrhythmia detector, wherein the controller circuit includes a hemodynamic stability assessment module configured to;
determine that at least one episode of ventricular tachyarrhythmia is detected in a subject; and
obtain a measurement of hemodynamic stability of the ventricular tachyarrhythmia from the heart sound signal.
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Accused Products
Abstract
A system comprising an implantable medical device (IMD). The IMD includes an implantable sensor operable to produce an electrical signal representative of mechanical activity of a heart of a subject and a controller circuit coupled to the sensor. The IMD also includes a heart sound sensor interface circuit to produce a heart sound signal, a tachyarrhythmia detector, and a controller circuit. The controller circuit includes a hemodynamic stability assessment module configured to determine that at least one episode of ventricular tachyarrhythmia is detected in a subject and obtain a measurement of hemodynamic stability of the ventricular tachyarrhythmia from the heart sound signal.
169 Citations
26 Claims
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1. A system comprising:
an implantable medical device (IMD) comprising;
an implantable heart sound sensor operable to produce an electrical signal representative of at least one heart sound, the heart sound associated with mechanical activity of a patient'"'"'s heart;
a heart sound sensor interface circuit coupled to the heart sound sensor to produce a heart sound signal;
a tachyarrhythmia detector; and
a controller circuit coupled to the heart sound sensor interface circuit and the tachyarrhythmia detector, wherein the controller circuit includes a hemodynamic stability assessment module configured to;
determine that at least one episode of ventricular tachyarrhythmia is detected in a subject; and
obtain a measurement of hemodynamic stability of the ventricular tachyarrhythmia from the heart sound signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising:
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detecting at least one episode of ventricular tachyarrhythmia in a subject;
sensing at least one heart sound signal for the subject using an implantable medical device (IMD), the heart sound signal associated with mechanical vibration of a heart of the subject; and
obtaining a measurement of hemodynamic stability of the ventricular tachyarrhythmia from the heart sound signal. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification