According to St. Jude Medical Inc. its Riata defibrillator leads have a higher failure rate than was disclosed when it stopped selling the product.
Riata has an insulation failure rate of 0.63 percent, more than the 0.47 percent disclosed last December, according to a recent warning letter to doctors.
Extractions of Riata leads were linked to two patient deaths and a serious injury. Devices with the flaw, caused when the insulation surrounding the wires is penetrated, may also fail to deliver electric shocks when needed, the company said.