Gan-Xin Yan is an American cardiologist, electrophysiologist and cardiovascular research scientist. His studies of arrhythmias have contributed to an understanding of J wave syndromes, long QT syndrome, and other abnormalities that can lead to sudden cardiac death. Yan is a professor at Lankenau Institute for Medical Research (LIMR) and a practicing cardiologist and electrophysiologist at Lankenau Medical Center, both located in Wynnewood, Pennsylvania.^[1] He also holds positions as professor of medicine at Sidney Kimmel Medical College of Thomas Jefferson University in Philadelphia and Xi'an Jiaotong University in Xi'an, Shaanxi, China.^[1]

Yan earned his MD in 1982 from Hubei Medical College, Xianning School in Xianning, Hubei, China.^[1] In 1986, he earned an MSc in physiology from Henan Medical University (now part of Zhengzhou University) in Henan province, and then completed a one-year residency in the discipline. In 1991, he earned a PhD in physiology from the University of Bern in Switzerland. Yan completed a residency in internal medicine in 1999 and a fellowship in cardiovascular disease in 2003, both at Lankenau Medical Center. He joined the LIMR faculty in 2004 as associate professor and was later named professor.^[1]

He is a member of the editorial boards of Heart Rhythm,^[2] the Journal of Cardiovascular Electrophysiology,^[3] and Cardiology.^[4]

In 2015, Yan served as co-chair of the J-Wave Syndromes Expert Consensus Conference in Shanghai, China,^[5] and edited a medical textbook.^[6]