Medically reviewed by Jeffrey S. Lander, MD The first heart sound, or S1, is the "lub" of a normal heartbeat. It's a ...

The S3 heart sound is essentially blood rushing into a specific chamber. Learn how this sound correlates to congestive heart ...

Pranayama is an ancient breathing technique that involves controlling your breath in various ways to connect the mind and ...

Although crackles have long been regarded as a hallmark finding in physical examinations, a new study has revealed their ...