ALEXANDRIA, Va., March 17 -- United States Patent no. 12,576,261, issued on March 17, was assigned to Boston Scientific Scimed Inc. (Maple Grove, Minn.).

"Account for preload changes in the left ventricle" was invented by Neethu Lekshmi Vasudevan Jalaja (Austin, Texas) and Carlos Reyes (Davie, Fla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of estimating a patient's cardiac preload in a patient having an implantable blood pump. The method includes generating a current waveform from operation of the implanted blood pump. A beat-to-beat pump filling index (PFI) is calculated, the PFI is calculated by dividing a current amplitude component by a time component, the amplitude component being calculat...