LV threshold measurement and capture management

US7684863B2 · kind B2 · utility

Assignee

• Medtronic, Inc. · US

Inventors

• Purvee P. Parikh · San Diego, US
• John C. Stroebel · Blaine, US
• Todd J. Sheldon · North Oaks, US
• Karen J. Kleckner · New Brighton, US

Key dates

• Filing date: Dec 20, 2005
• Grant date: Mar 23, 2010
• Expiry date: Dec 25, 2028

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/36843
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The invention provides methods and apparatus for determining in a non-tracking pacing mode (e.g., DDI/R, VVI/R) whether a ventricular pacing stimulus is capturing a paced ventricle, including some or all of the following aspects. For example, increasing a ventricular pacing rate a nominal amount to an overdrive pacing rate higher than a most recent heart rate and evaluating a conduction interval from a first pacing ventricle to a second sensing ventricle and then continuing to monitor the underlying rate to ensure that a threshold testing pacing rate will not exceed a predetermined minimum interval and providing pacing stimulation to the first ventricle and sensing the second ventricle to determine whether the pacing stimulation to the first ventricle was one of sub-threshold and supra-threshold. The methods and apparatus are especially useful in conjunction with ensuring actual delivery of a ventricular pacing regime (e.g., cardiac resynchronization therapy or “CRT”).