We all jump when a phone suddenly rings, but for some people this can be lethal. Type 2 long QT syndrome is a rare condition characterised by cardiac arrest in response to sudden jarring sounds or frights. Long QT syndrome is most commonly acquired, ie secondary to something like medication or electrolyte abnormalities. However, it can also be inherited, which is called congenital long QT syndrome. - Dr Rohin Francis ------------ More Medlife Crisis: http://www.medlifecrisis.co.uk/ https://twitter.com/medcrisis https://www.facebook.com/Medlifecrisis https://www.instagram.com/medcrisis ------------ Music: Deep Blue from https://www.bensound.com/ (royalty-free) Some of the ECGs reproduced with thanks from https://www.EMS12lead.com/ Diagram: https://www.frontiersin.org/articles/10.3389/fped.2013.00039/full