We report an infant with intractable congestive heart failure caused by coarctation of the aorta, patent ductus arteriosus, atrial septal defect, and multiple muscular ventricular septal defects. He had received balloon angioplasty for dilating the aortic coarctation and a Gianturco coil for closing the ductus at a single therapeutic catheterization session at 4 months old. After balloon angioplasty, his heart failure had dramatically resolved. A false aneurysm and mediastinal hematoma were noted on the following day. The hematoma revealed total resolution 10 weeks later. He was asymptomatic throughout 12 months of follow-up.