Third Heart Sound Gallop | Auscultation Cheat Sheet with Sounds & Video | #84

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 video 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.

Auscultation Audio

auscultation sound from lesson
waveform

Patient Sounds

patient heart or lung sound
Third Heart Sound Gallop

Half Speed Patient Sounds

patient heart or lung sound
Third Heart Sound Gallop

Technique

Patient position
The patient's position should be supine.

Auscultation Tips

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

Sound Wave



Observe Cardiac Animation

Authors and Sources

Authors and Reviewers


Sources

Return to Reference Guide Index Page
Third Heart Sound Gallop | Auscultation Cheat Sheet with Sounds & Video | #84

Electrocardiogram (EKG/ECG) ECG Interpretation
Heart Sounds Heart Sounds
Lung Sounds Lung Sounds
Blood Pressure Blood Pressure
multimedia lessons Medical Terms
Ultrasound image Ultrasound
Electrocardiogram (EKG/ECG) EKG Rhythms
Pulmonary Problem-Solving Respiratory Care
multimedia lessons Basic ECG Monitor
Adv. ECG Monitor
Pulmonary Hypertension course image Fundamentals
Lung Sounds Key Lung Sounds
Pediatric referral image Pediatric Referral
Carotid Artery Bruit Carotid Bruit
Pulmonary Hypertension course image Pulmon. Hypertension
Abdominal Sounds Abdominal Sounds
Auscultation Training by Repetition Repetition Drill
auscultation guide torso

Reference Guide
multimedia lessons Free Resources
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