Patent Number: 7,787,942

Title: Mechanical ventricular pacing non-capture detection for a refractory period stimulation (RPS) pacing therapy using at least one lead-based accelerometer

Abstract: A system and method for monitoring at least one chamber of a heart (e.g., a left ventricular chamber) during delivery of a refractory period stimulation (RPS) therapy to determine if the desired non-capture (i.e., lack of ventricular mechanical capture due to refractory period stimulation) occurs. The system includes an implantable or external cardiac stimulation device in association with a set of leads such as epicardial, endocardial, and/or coronary sinus leads equipped with motion sensor(s). The device receives and processes acceleration sensor signals to determine a signal characteristic indicative of chamber capture due to pacing stimulus delivery, non-capture due to RPS therapy delivery, and/or contractile status based on the qualities of evoked response to pacing stimulation.

Inventors: Chinchoy; Edward (Golden Valley, MN), Hess; Michael F. (Minneapolis, MN)

Assignee: Medtronic, Inc.

International Classification: A61B 5/04 (20060101)

Expiration Date: 8/31/12018