5 things to know about fainting: The heart's role and when it may signal serious condition
Mayo ClinicYou may have heard that people who feel faint should sit with their heads between their knees, but is that true? And how can you tell whether you or someone else who has fainted should go to the emergency department or perhaps even see a cardiologist? Elijah Behr, M.D., a cardiologist at Mayo Clinic Healthcare in London, explains five things it is important to know about fainting.