An example of right ventricular scar in a highly trained triathlete presenting with sustained ventricular tachycardia. Images are presented from a 40-yr-old ultraendurance triathlete who had competed for 20 yr prior to developing potentially life-threatening sustained ventricular tachycardia originating from the basal portion of the RV. Gradient-echo inversion recovery cardiac magnetic resonance images are presented following administration of gadolinium contrast.Arrowheads highlight the signal enhancement signifying fibrosis of the basal free wall of the RV. The question that cannot be addressed in such anecdotes is whether exercise contributes to, or causes, fibrosis such as this.