Introduction Around Valentine's Day heart-shaped images seem to be everywhere ... can easily be heard using a good stethoscope. Every time a person's heart beats it contracts and acts as a ...

In 1816, French doctor René Laennec introduced the use of a hollow tube to listen to the lungs and heart, giving rise to the modern stethoscope. (UIG via Getty Images) "He was so excited that he ...

The traditional doctor's stethoscope ... and record a heartbeat. An app developed by a team including King's College London records not only the basic 'lub-dub' of a beating heart but the sounds ...