An S3 heart sound can indicate heart failure in some people. However, doctors may also hear it in healthy individuals. Doctors typically listen to heart sounds by placing a stethoscope on the ...

Medically reviewed by Rafle Fernandez, MD A third heart sound, or S3, is a low-frequency, extra heart sound that may be heard ...

Normal Heart Sounds. Heart sounds are the noises made when heart valves close as blood moves through the heart. S1 and S2 are normal heart sounds. Other heart sounds, such as S3 and S4, are abnormal.

The main normal heart sounds are the S1 and the S2 heart sound. The S3 can be normal, at times, but may be pathologic. A S4 heart sound is almost always pathologic.

Doctors listen for the S4 sound because it often indicates an issue with the heart. According to experts, diastolic sounds — S3 and S4 — present a concern for doctors since all but a few cases ...

Heart's sounds can help diagnose heart failure, study finds. ScienceDaily . Retrieved June 3, 2025 from www.sciencedaily.com / releases / 2010 / 08 / 100810163500.htm ...

The fourth heart sound (S4) sounds like “Toronto,” with emphasis on the middle syllable (tor ON to). The presence of this heart sound means that the ventricle is stiff and noncompliant, just like that ...

S3 Gen 2 Sound Platform for BT earbuds. low-latest gaming audio over Bluetooth LE <20 ms latency with voice. Allows gaming brands that had been using two-chip solutions (BT + proprietary) to offer ...

determine a daily S3 heart sound value using the plurality of S3 heart sound measurements; produce a plurality of respiration rate measurements using the received respiration signal; and.

The knock occurs earlier than a S3 heart sound. which is the distinguishing factor; this is because the S3 heart sound occurs from a stretch of a very compliant LV, which takes a short time longer.