In most patients, symptoms of fainting can be easily recognized before a person faints. If your fainting episodes are severe, unpredictable, and frequent, then most generic advice will probably not work for you.
A study presented at ESC Congress 2020 showed that using a pacemaker can quickly treat unpredictable fainting. The study was carried out among 128 patients over the age of 40 who had fainted at least twice without any warning signs in the past year. All the patients were given a pacemaker. One group of patients, called the pacing group, had the pacemaker switched on, and the other group, called the control group, had it switched off.
After 11.2 months, 53% of the control group patients fainted compared to 16% of the pacing group patients. The study concluded that a pacemaker is an effective treatment for preventing fainting. If 11 patients are given a pacemaker, five patients can prevent fainting episodes.