The AHA reports that he received a stent and is doing well.

The attack occurred while the AHA’s annual scientific sessions meeting was being held in Anaheim, California. Warner, an interventional cardiologist, has been the CEO of UT Southwestern Hospital in Dallas since 2012.

Warner has an MD from Vanderbilt University and a MBA from the University of Tennessee. He completed his residency training in internal medicine at UT Southwestern and his cardiology fellowship at Duke University.

The president of the American Heart Association, John Warner, had a “mild heart attack” on Monday morning, according to the AHA. Warner received a stent at an undisclosed hospital. The AHA said he is “doing well.” Warner is 52.

Upon hearing the news Sek Kathiresan (Broad Institute) tweeted: “Unbelievable. He just spoke last night about the many males in his family being affected by coronary disease. Our thoughts and prayers for a speedy recovery.