US 11,701,517 B2
Cardiac resynchronization therapy using accelerometer
Subham Ghosh, Blaine, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Feb. 18, 2020, as Appl. No. 16/793,193.
Claims priority of provisional application 62/816,847, filed on Mar. 11, 2019.
Prior Publication US 2020/0289829 A1, Sep. 17, 2020
Int. Cl. A61N 1/365 (2006.01); A61N 1/362 (2006.01); A61N 1/368 (2006.01); A61N 1/39 (2006.01); A61N 1/37 (2006.01)
CPC A61N 1/36585 (2013.01) [A61N 1/368 (2013.01); A61N 1/3624 (2013.01); A61N 1/36578 (2013.01); A61N 1/3706 (2013.01); A61N 1/3937 (2013.01); A61N 1/3956 (2013.01)] 24 Claims
OG exemplary drawing
 
1. An implantable medical device comprising:
a plurality of electrodes comprising:
a first electrode configured to be implanted in an atrium of a patient's heart to deliver a cardiac therapy or sense atrial electrical activity of the atrium of the patient's heart; and
a second electrode configured to be implanted in a septal wall of the patient's heart distal to the first electrode and to deliver the cardiac therapy to or sense ventricular electrical activity of a ventricle of the patient's heart;
a motion detector to detect mechanical activity of the patient's heart;
a therapy delivery circuit operably coupled to the plurality of electrodes to deliver the cardiac therapy to the patient's heart;
a sensing circuit operably coupled to the plurality of electrodes to sense the atrial electrical activity and the ventricular electrical activity of the patient's heart, and operably coupled to the motion detector to sense the mechanical activity of the patient's heart; and
a controller comprising processing circuitry operably coupled to the therapy delivery circuit and the sensing circuit, the controller configured to:
deliver at least one pacing pulse of the cardiac therapy according to an atrioventricular (AV) pacing interval using the second electrode;
determine at least one electromechanical interval based on one or more of the atrial electrical activity, the ventricular electrical activity, and the mechanical activity in response to delivering the at least one pacing pulse, wherein the at least one electromechanical interval is based on at least the mechanical activity in response to delivering the at least one pacing pulse, and wherein the at least one electromechanical interval comprises an interval from the ventricular electrical activity indicating ventricular pacing to the mechanical activity indicating mitral valve closure; and
adjust the AV pacing interval based on the at least one electromechanical interval.