A pacemaker to prevent fainting
If your heart rate slows, a device can stop you from dropping.
If you have ever fainted, you know it can be a frightening experience. There are many conditions that can cause fainting, but a nervous system reflex is often responsible. Certain triggers—for example, standing in a hot, crowded area—can cause blood pressure to fall, and with it, blood flow to the brain. The person may or may not feel faint or nauseated before blacking out.