Because St. Jude is the only company that carries the abrasion technology and St. Jude has the best quality of its valves. Almost every pace maker runs into a little bit problem with its wires, but it is not unmanageable. St. Jude offers to replace wire not taking out the wire. Patients who insist to have the wire taken out have to sign a legal document of the liability and consequence. So far, no death has been claimed from the patients asked to replace the wire, but only ones who asked to take out the wire.