System and method for avoiding undersensing of ventricular fibrillation

US9002443B2 · kind B2 · utility

Assignee

• Medtronic, Inc. · US

Inventors

• Xusheng Zhang · Shoreview, US
• Mark L. Brown · North Oaks, US
• Paul J. DeGroot · Brooklyn Park, US
• Saul E. Greenhut · Aurora, US
• Troy E. Jackson · New Brighton, US

Key dates

• Filing date: Mar 15, 2013
• Grant date: Apr 7, 2015
• Expiry date: Mar 21, 2033

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/3621
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A medical device and associated method for detecting and treating tachyarrhythmias acquires a cardiac signal using electrodes coupled to a sensing module. Cardiac events are sensed from the cardiac signal and a processing module computes a first morphology metric for each sensed cardiac event occurring during a time segment of the cardiac signal. The first morphology metrics corresponding to an event originating in a ventricular chamber are counted. The first processing module computes a second morphology metric for the time segment of the cardiac signal in response to the count of the first morphology metrics meeting a threshold number of events. The time segment is classified as a shockable segment in response to the second morphology metric meeting a detection criterion.