Third Heart Sound Gallop

A third heart sound occurs early in diastole. In young people and athletes it is a normal phenomenon. In older individuals it indicates the presence of congestive heart failure.

The third heart sound is caused by a sudden deceleration of blood flow into the left ventricle from the left atrium. In the anatomy tab you will see a thin-walled, dilated left ventricle with generalized decreased vigor of contraction.

In the presence of a third heart sound (S3) the first heart sound is decreased in intensity while the second heart sound is increased in intensity.

The third heart sound is a low frequency sound best heard with the bell of the stethoscope pressed lightly on the skin of the chest.

Third Heart Sound Gallop
Position: Mitral
Chestpiece: Bell


maneuver
Maneuver: Supine

Phonocardiogram

waveform

Cardiac Animation



This website is only for medical professional education. Contact a healthcare provider for medical care. Copyright 2011-2019 © MedEdu LLC. All Rights Reserved. About | Privacy Policy | Email

  • facebook like
  • twitter like
  • linkedin like
  • email share