There are two kinds of heart replacement valves, one is a biological valve and the other is a metal valve, but they are all metal frames, a mechanical structure that opens and closes under the impact of the blood flow and is used for the regulation of blood flow in the heart.
They are both mechanical devices with little electrical activity at all. They move under the impact of blood flow and are not affected by the electromagnetic environment. (But be careful with NMR*** vibration, metal objects can shift during magnetic **** vibration, always listen to your physician.)
Electronic pulse massage instrument is through the electric pulse to simulate the Chinese medicine massage techniques, that is, electricity is transformed into kinetic energy, it is only a very slight local current, as long as the state allows the use of the human body, this point of the current is safe, the activity of the heart valves, the life of the cardiac valve have no effect.