S3 Heart Sound Page
Welcome to our S3 heart sound page. On this page we provide a definition and then we compare heart sounds with s3 to heart sounds with s4, using audio recordings and text. Finally, there is a link to the training lessons available on this site.
What is an S3 Heart Sound?
The third heart sound is a short, low frequency sound heard best with the stethoscope's bell. It occurs early in diastole and is dull in quality. As an extra heart sound, it creates a galloping rhythm with a cadence like word 'Kentucky'.
Normal vs S3 Heart Sound
Here we offer a comparison of a normal heart sound vs an S3 heart sound.
Compare normal to S3.
Listen to this normal heart sound recording.
S3 Heart Sound
Listen for a short, low frequency sound early in diastole. Try to match the cadence to 'Kentucky'.