Povidone-iodine solution, sterile gloves, gown, sterile drapes, a safety-engineered 22- or 24-gauge 1-inch catheter-over-needle assembly, extension tubing, 10-mL syringe, 3-way stopcock, lidocaine, and underwater seal if the catheter is to be left indwelling, transillumination device for pneumopericardium, transthoracic echocardiogram/ultrasound device.