Human heartbeat can be accurate biometric identifier, study concludes | Biometric Update
Monitors with scanner image of heart arteries and heartbeat during non-invasive surgery in hospital Stock Photo - Alamy
Heart Rate Monitor - YouTube
GE Healthcare Launches Breakthrough, Ultra-Fast CT Scanner: Freezes the Heart's Motion in Just One Heartbeat without Sacrificing Image Quality | Business Wire
Cardiograph - Heart Rate Meter - Apps on Google Play
Heartbeat Scanner:Amazon.co.uk:Appstore for Android