US 2014/0277238 A1 · SYSTEM AND METHODS FOR IMPROVING DEVICE THERAPY USING HEART SOUNDS

Abstract

Devices and methods for improving device therapy such as cardiac resynchronization therapy (CRT) by determining a desired value for a device parameter are described. An ambulatory medical device can be configured to detect a heart sound signal and generate one or more heart sound metrics, detect a characteristic indicative of cannon waves, and determine a desired value for a device parameter, such as a timing parameter which can be used to control the delivery of CRT pacing to various heart chambers. The desired device parameter value can be determined using the heart sound metrics and the characteristic indicative of the cannon waves. The ambulatory medical device can program stimulation using the desired device parameter value, and deliver the programmed stimulations to one or more target sites to achieve desired therapeutic effects.

Claims20

Dependent claims

An ambulatory medical device, comprising:

a stimulation generation circuit configured to generate stimulations for stimulating one or more target sites;
a heart sound detector circuit configured to sense a heart sound signal and generate one or more heart sound metrics including S1 intensity;
a cannon-wave detector circuit configured to detect a cannon wave characteristic indicative of one or more cannon waves;
a therapy adjustment circuit configured to determine a desired value for a device parameter using the one or more heart sound metrics and the cannon wave characteristic;
and
a controller circuit configured to be included with or coupled to the therapy adjustment circuit and the stimulation generation circuit, the controller circuit configured to program the stimulations using the desired value for the device parameter and to schedule the delivery of the stimulations to the one or more target sites.

3 more elements

A method for providing a device therapy, comprising:

sensing one or more physiologic signals including a heart sound signal, and generating one or more signal metrics from the one or more physiologic signals, the one or more signal metrics including S1 intensity;
detecting a cannon wave characteristic indicative of one or more cannon waves;
determining a desired value for a device parameter using the one or more signal metrics and the cannon wave characteristic;
generating stimulations using the desired value for the device parameter;
and
delivering the stimulations to one or more target sites.

3 more elements

Dependencies are inferred from the claim text.

System and methods for improving device therapy using heart sounds

Life of this patent

System and methods for improving device therapy using heart sounds

Life of this patent

Abstract

Claims20