Auscultation Training by Repetition

Third Heart Sound Gallop - Abnormal

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pause

Listen for 2-3 minutes

Supine

Bell

Listening Tips

S1: Reduced intensity.
S2: Increased intensity.
Diastole: S3 early in diastole, low pitched, heard during expiration.

Repetition Training - Basic Heart Sounds

Table of Contents

1	Third Heart Sound Gallop	84
2	Fourth Heart Sound Gallop	85
3	Aortic Stenosis (Diamond Shaped Systolic Murmur)	123
4	Aortic Regurgitation - Moderate	5
5	Mitral Stenosis (Diastolic Murmur)	125
6	Mitral Regurgitation	91
7	Innocent Murmur	36

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Lesson Text

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.

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soundID	62
maneuver	Supine
Title	Third Heart Sound Gallop - Abnormal
Position	Mitral
realSoundID	5005
caseID	84
S1	Reduced intensity
Systole
S2	Increased intensity
Diastole	S3 early in diastole, low pitched, heard during expiration
features
lungsounds	False
chestpiece	Bell