Abstract
A 54-year-old Chinese woman presented with a 10-year history of repeated paroxysmal palpitations. She was diagnosed with paroxysmal supraventricular tachycardia by 12-lead electrocardiogram and was advised to undergo catheter-based radiofrequency ablation. During the procedure, a rare complication occurred that was diagnosed as a right internal mammary artery penetrating injury. After appropriate emergency treatment with arterial embolization and membrane-covered stent implantation, the patient was out of immediate danger of haemorrhaging. Follow-up computed tomography angiography of the subclavian artery at 3 months after she was discharged from hospital revealed stent-graft patency with no evidence of in-stent thrombosis or stent stenosis. No problems were observed at the 6-month follow-up visit.