If someone loses consciousness for a few seconds or minutes, they are often said to have had a blackout. Find out more here.
Palpitations make you feel like your heart is beating too hard or fast, skipping a beat, or fluttering. You could feel these in your chest, throat or neck.
There are many different causes of chest pain. Find out more about the causes, risks and what you can do here.
Breathlessness is an easy sign to ignore or put down to simply age or being unfit. But there are many causes of breathlessness. Find out more here.