Fusion pacing enhancements

US8046065B2 · kind B2 · utility

Assignee

• Medtronic, Inc. · US

Inventors

• John E. Burnes · Andover, US
• Karen J. Kleckner · New Brighton, US
• Thomas J. Mullen · Andover, US

Key dates

• Filing date: Feb 5, 2007
• Grant date: Oct 25, 2011
• Expiry date: Dec 27, 2029

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/36842
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The disclosure provides methods and apparatus of left ventricular pacing including automated adjustment of a atrio-ventricular (AV) pacing delay interval and intrinsic AV nodal conduction testing. It includes—upon expiration or reset of a programmable AV Evaluation Interval (AVEI)—performing the following: temporarily increasing a paced AV interval and a sensed AV interval and testing for adequate AV conduction and measuring an intrinsic atrio-ventricular (PR) interval for a right ventricular (RV) chamber. Thus, in the event that the AV conduction test reveals a physiologically acceptable intrinsic PR interval then storing the physiologically acceptable PR interval in a memory structure (e.g., a median P-R from one or more cardiac cycles). In the event that the AV conduction test reveals an AV conduction block condition or if unacceptably long PR intervals are revealed then a pacing mode-switch to a bi-ventricular (Bi-V) pacing mode occurs and the magnitude of the AVEI is increased.