ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,231, issued on March 18, was assigned to Medtronic Inc. (Minneapolis).

"Method and apparatus for atrial arrhythmia episode detection" was invented by Shantanu Sarkar (Roseville, Minn.), Daniel L. Hansen (Castle Rock, Colo.), Grant A. Neitzell (Plymouth, Minn.), Jerry D. Reiland (Coon Rapids, Minn.) and Ryan D. Wyszynski (Oak Grove, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Techniques and devices for implementing the techniques for adjusting atrial arrhythmia detection based on analysis of one or more P-wave sensing windows associated with one or more R-waves. An implantable medical device may determine signal characteristics of the cardi...