Multi-threshold sensing of cardiac electrical signals in an extracardiovascular implantable cardioverter defibrillator

US11413469B2 · kind B2 · utility

Assignee

• Medtronic, Inc. · US

Inventors

• Jian Cao · Shoreview, US
• Timothy A. Ebeling · Circle Pines, US
• Saul E. Greenhut · Aurora, US
• Michael W. Heinks · New Brighton, US
• Irving J. SANCHEZ · Blaine, US
• Paul R. Solheim · Blaine, US
• Xusheng Zhang · Shoreview, US
• Gerald P. Arne · Orr, US

Key dates

• Filing date: Nov 26, 2019
• Grant date: Aug 16, 2022
• Expiry date: Aug 21, 2040

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/39
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An implantable medical device system capable of sensing cardiac electrical signals includes a sensing circuit, a therapy delivery circuit and a control circuit. The sensing circuit is configured to receive a cardiac electrical signal and sense a cardiac event in response to the signal crossing a cardiac event sensing threshold. The therapy delivery circuit is configured to deliver an electrical stimulation therapy to a patient's heart via the electrodes coupled to the implantable medical device. The control circuit is configured to control the sensing circuit to set a starting value of the cardiac event sensing threshold and hold the starting value constant for a sense delay interval. The control circuit is further configured to detect an arrhythmia based on cardiac events sensed by the sensing circuit and control the therapy delivery circuit to deliver the electrical stimulation therapy in response to detecting the arrhythmia.