Report of the American Heart Association (AHA) Scientific Session 2017, Anaheim, California.

On November 11-15, the American Heart Association (AHA) Scientific Sessions 2017 were held in Anaheim, California, for the first time in 16 years. The annual sessions attracted nearly 18,000 attendees, with a global presence from more than 100 countries, and featured 5 days of programming for cardiovascular basic scientists, clinicians, and researchers. As usual, activities of participants from Japan were prominent. From the exciting sessions, I report the topics and key presentations including the late-breaking clinical trials.