 Dr. Tajik holds several U.S. patents on ultrasound catheter-based technology.He presented the prestigious Edler Lecture at the American Society of Echocardiography in 2000 and the Herrick Lecture at the American Heart Association meeting in Illinois in 2000.He presented the Euro Echo Lecture in 2001, the Bishop Lecture at the American College of Cardiology meeting in 2003, the Population Sciences Lecture at the annual European Society of Cardiology meeting in 2004, Modena Lecture and Morgagni Lecture at the Italian International Congress in 2005 at the Italian Cardiac Society, the Hagege Lecture at the French Society of Cardiology in 2006, the William Harvey Lecture at the University of Padova, Italy in 2007, the State-of-the-Art lecture at the Annual Japanese Circulation Society meeting in 2009 and the Hans Hecht Lecture at the University of Chicago in 2010.