US 10,376,705 B2
Method and apparatus for discriminating tachycardia events in a medical device
Xusheng Zhang, Shoreview, MN (US); and Robert W Stadler, Shoreview, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Apr. 1, 2014, as Appl. No. 14/242,391.
Prior Publication US 2015/0273227 A1, Oct. 1, 2015
Int. Cl. A61N 1/39 (2006.01)
CPC A61N 1/3925 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method of detecting a cardiac event and delivering shock therapy via a medical device, comprising:
sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a first sensing vector and a second sensing vector;
performing a first processing of a first interval sensed along the first sensing vector during a predetermined sensing window and a second interval simultaneously sensed along the second sensing vector;
identifying the cardiac event as being a shockable event based on the first processing of the first interval and the second interval;
performing a second processing of the first interval and the second interval, different from the first processing, in response to the cardiac event being identified as a shockable event;
determining whether to delay a confirmation of the identification of the cardiac event as being shockable based on the second processing of the first interval and the second interval;
initiating charging of a high voltage shocking capacitor of the medical device configured to deliver the shock therapy in response to determining not to delay the confirmation of the identification of the cardiac event as being shockable based on to the second processing; and
discharging the high voltage shocking capacitor to deliver the shock therapy.