Summary

A 70-year-old woman with Wolf-Parkinson-White syndrome developed cardiac tamponade while undergoing radiofrequency catheter ablation for left posterolateral accessory pathway from the ventricular side below the mitral valve, requiring emergency surgery. During surgery, the patient was found to have perforation of the left posterior free wall as well as left atrial dissection. The patient died despite emergency measures. This case was remarkable because radiofrequency catheter ablation resulted in two very rare complications occurring at the same time in a patient.