A 31-year-old male was referred for a stress test due to worsening palpitations and chest pressure. His clinic 12-lead electrocardiogram was normal. At the time of his stress test, his pre-exercise electrocardiogram revealed an intermittent short PR interval with a delta wave. This pattern resolved during exercise, but in recovery he experienced paroxysms of supraventricular tachycardia. Imaging revealed low left ventricular ejection fraction. Given the diagnosis of Wolff-Parkinson-White Syndrome, he underwent radiofrequency ablation. His cardiomyopathy was presumed to be secondary to his Wolff-Parkinson-White, and an echocardiogram a few months later showed normalization of his left ventricular ejection fraction.