LISTEN: Audio of a normal heartbeat and two anomalies: One thing on which both sides agree, however, is that doctors aren’t very good at using stethoscopes — and haven’t been for a long while.

The device shows instant images of the heart and other organs, helping doctors diagnose a range of ailments. Proponents say these devices are nearly as easy to use as stethoscopes and allow ...

One study found that doctors in three countries could only detect abnormal heart sounds using a stethoscope about 20 percent of the time, meaning four out of every five patients with a potential ...