third heart sound


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Related to third heart sound: fourth heart sound

third heart sound (S3),

occurs in early diastole and corresponds with the end of the first phase of rapid ventricular filling; normal in children and younger people but abnormal in others.
Synonym(s): third sound

third heart sound

S3 gallop, ventricular gallop Cardiology An extra heart sound traditionally regarded as a sign of left ventricular systolic dysfunction–heart failure; its significance differs according to the valve involved and the type of underlying defect; it is caused by rapid ventricular filling, and best heard over the apex with the Pt in supine or left lateral position; it ↑ with inspiration, exercise, elevation of legs, ↑ venous return. Cf Fourth heart sound.

third heart sound

(S3) (thĭrd hahrt sownd)
Occurs in early diastole and corresponds with the end of the first phase of rapid ventricular filling; normal in children and younger people but abnormal in others.
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d) Controlling for age, sex, eGFR, history of acute destabilized HF, and the presence of orthopnea, paroxysmal nocturnal dyspnea, nocturnal cough, jugular venous distension, pulmonary rales, third heart sound, and peripheral edema.
Midregional pro-A-type natriuretic peptide measurements for diagnosis of acute destabilized heart failure in short-of-breath patients: comparison with B-type natriuretic peptide (BNP) and amino-terminal proBNP
1] These guidelines noted that the presence of elevated jugular venous pressure, a third heart sound, and laterally displaced apical impulse are "virtually diagnostic in patients with compatible symptoms," while the sensitivity and specificity of other clinical features have not proven sufficient to establish the diagnosis.
Diagnosing congestive heart failure

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