EBR Systems, Inc. announced that positive results from the first completely leadless cardiac resynchronization therapy (CRT) in the United States have been published in The Journal of the American College of Cardiology (JACC). The positive results published in JACC are based on a 1-year follow-up of the first-in-human implantation in the US of totally leadless CRT pacing utilizing the Micra leadless pacing system in the right ventricle in conjunction with EBR's investigational WiSE®? CRT Electrode in the left ventricle of the heart.

At 12-months, the patient showed improved heart failure symptoms (NYHA Class III to II), no recurrent heart failure-related hospitalization, a reduction in QRS duration, and an improvement in left ventricle from 30% to 65%. This first use in the US of the WiSE CRT System as a first-line therapy is a future market expansion opportunity for EBR. The initial addressable market of $2.6 billion is focused on treating patients who had previously failed CRT and by treating new CRT patients, the addressable market could increase to $6.8 billion.

Based on the patient's health complications and risks, the implantation of EBR's investigational Wi SE CRT System alongside Medtronic's Micra received requisite approval from the Institutional Review Board (IRB) and U.S. Food and Drug Administration (FDA) on compassionate grounds. The Journal of theAmerican College of Cardiology (J ACC) is a prestigious, peer-reviewed medical journal dedicated to the field of cardiology. As a leading publication in the cardiovascular sciences, JACC provides a platform for the dissemination of research, clinical studies, and breakthroughs in cardiovascular medicine.

The WiSE®? CRT System has the potential to offer a new treatment option for patients including the 3 million heart failure patients worldwide who were previously untreatable by conventional CRT, and potentially, the 64 million heart failure patients across the globe.