In this issue of Cardiac Electrophysiology Clinics, guest editor Matthew W. Martinez brings his considerable expertise to the topic of Sports Cardiology. Cardiovascular causes account for most sports-related deaths, especially in young athletes. Causes of sudden cardiac arrest are heterogeneous and associated with a spectrum of cardiovascular diseases. Most cases are associated with congenital or acquired cardiac abnormalities, with most events in individuals that had not been previously detected. The field of sports and exercise cardiology continues to evolve to encompass the burgeoning number of people who are physically active, including tactical athletes, and those with cardiovascular diseases or risk factors.