II. Pathophysiology

  1. S3 sound represents rapid passive ventricular filling
    1. Occurs as ventricles start to expand during early diastole
  2. Outside of normal causes (see below), typically represents ventricular overfilling
    1. Associated with a dilated ventricle and Systolic Dysfunction

III. Signs

  1. S1, S2, S3 sound like "Ken-tuck-y" (lub-dub-dub)

IV. Technique

  1. Best heard in left lateral decubitus position

V. Causes

  1. Normal
    1. Age under 40 years
    2. Third Trimester of pregnancy
  2. Left or Right Ventricle Volume Overload
    1. Mitral Regurgitation
    2. Tricuspid Regurgitation
    3. Congestive Heart Failure

VI. Resources

  1. University of Michigan Heart Sound and Murmur Library
    1. http://www.med.umich.edu/lrc/psb/heartsounds/

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Related Studies

Ontology: S3 - Third heart sound (C0232237)

Concepts Finding (T033)
SnomedCT 1285004, 277455002
English Third heart sound, S3 (function), Third heart sound, S3, function (observable entity), Third heart sound, S3, Third heart sound, S<sub>3</sub> (function), Third heart sound, S<sub>3</sub>, function (observable entity), Third heart sound, S<sub>3</sub>, Third Heart Sound, Third heart sound, S3, function, Third heart sound, S<sub>3</sub>, function, Third heart sound, S>3<, function, S3 - Third heart sound, Third heart sound, S3, NOS, Third heart sound, S>3<, NOS, Third heart sound, S<sub>3</sub>, NOS, heart sounds S3, third heart sound, S3 heart sound, S3 heart sound (physical finding), heart s3 sounds, s3 heart sound, heart sound third, heart sound s3, Third cardiac sound, Third heart sound, Third heart sound (finding), Third heart sound, S>3<, function (observable entity), Third heart sound, S>3<, Third heart sound, S>3< (function)
Dutch derde harttoon
French Troisième bruit du coeur
German dritter Herzton
Italian Terzo tono cardiaco
Portuguese Terceiro som cardíaco
Spanish Tercer ruido cardiaco, tercer sonido cardíaco, tercer ruido cardíaco, R3 (función), tercer ruido cardíaco, R<sub>3</sub>, tercer ruido cardíaco, R<sub>3</sub> (función), tercer ruido cardíaco, R3, tercer ruido cardíaco, R<sub>3</sub> (entidad observable), tercer ruido cardíaco, R3 (entidad observable), tercer ruido cardíaco, R>3< (entidad observable), tercer ruido cardíaco, R>3< (función), tercer ruido cardíaco, R>3<, tercer sonido cardíaco (hallazgo), tercer ruido cardíaco (hallazgo), tercer ruido cardíaco
Japanese 第3音, ダイ3オン
Czech Třetí srdeční ozva
Hungarian Harmadik szívhang