Estimated 1.5m people in the UK live with a type of heart valve disease that experts call a ‘silent killer’ Sign up for our free Health Check email to receive exclusive analysis on the week in health Get our free Health Check email Get our free Health Check email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice A stethoscope that uses artificial intelligence could help doctors detect serious heart valve disease years