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Agoraphobia is a fear of being in situations where escape might be difficult, or help wouldn't be available if things go wrong.
Our Health A-Z contains more information on Fear of open spaces.
Supraventricular tachycardia (SVT) is the name given to an abnormality of heart rhythm, characterised by a fast heartbeat.
Our Health A-Z contains more information on SVT.
Important: If you have these symptoms, they may be unrelated to any of these conditions listed. If you are concerned about your symptoms then you should see a doctor.