Dr. Jonathan M. Tobis is the Director of Interventional Cardiology Research at UCLA and Clinical Professor of Medicine in Cardiology at the University of California, Los Angeles. He performed the world’s first digital left ventricular and coronary angiograms and contributed to the advancements of intravascular ultrasound early in his career. His recent work is devoted to understanding the role of PFO closure in relation to several medical conditions including stroke and migraine. He was voted one of the 10 Most Highly Regarded Heart Doctors in the United States.