We are in the office of Dr. Lawrence H. Cohn, MD, a pioneering cardiac surgeon, a researcher and medical educator. Dr. Lawrence H. Cohn, MD has been on surgical staff at Harvard Medical School since 1971. Dr. Lawrence H. Cohn, MD has been a professor of surgery at Harvard Medical School since 1980. In 2000 Dr. Cohn was awarded the first endowed chair in cardiac surgery at Harvard Medical School. Dr. Cohn is a graduate of University of California at Berkeley and Stanford University, where he received Doctor of Medicine degree with distinction He did his graduate medical training at Boston City Hospital, at the National Heart Institute in Bethesda, Maryland and at University of California in San Francisco. Dr. Lawrence H. Cohn, MD. also worked at Stanford University with renowned cardiac surgeon, Dr. Norman Shumway. Dr. Lawrence H. Cohn, MD, performed more than 12,000 heart operations over 40 years of his surgical practice. Dr. Cohn focused his attention on heart valve surgery and minimally invasive heart surgery. Dr. Cohn has published over 500 peer reviewed scientific articles, he wrote 105 chapters in cardiac surgery books. Dr. Cohn is author of 12 books on cardiac surgery, including "Cardiac Surgery in the Adult”. Dr. Anton Titov, MD. It is the most referenced (cited, respected) textbook about cardiac surgery today. Professor Cohn trained more than 200 cardiac surgeons, many of whom are in leadership cardiac surgery positions around the world. Dr. Cohn has given more than 750 lectures around the world. Dr. Anton Titov, MD. Professor Cohn, thank you and welcome! 1234 Pleasure to be here. Dr. Cohn is a pioneering cardiac surgeon, researcher, and medical educator. He is Professor of Cardiac Surgery at Harvard Medical School. Dr. Cohn received MD from Stanford University, where he worked with renowned cardiac surgeon Dr. Norman Shumway. Dr. Cohn focused his attention on heart valve surgery and minimally invasive heart surgery. He performed more than 12,000 heart operations over 40 years of surgical practice. Dr. Cohn has published over 500 peer-reviewed scientific articles, he wrote 105 chapters in cardiac surgery books. He authored 12 books on cardiac surgery. Books include “Cardiac Surgery in the Adult”. It is the most referenced textbook about cardiac surgery.