S3 gallop

gallop /gal·lop/ (gal´op) a disordered rhythm of the heart; see also under rhythm.

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atrial gallop  S

diastolic gallop  S

presystolic gallop  S

S3 gallop  an accentuated third heart sound in patients with cardiac disease characterized by pathological alterations in ventricular filling in early diastole.

S4 gallop  an accentuated, audible fourth heart sound usually associated with cardiac disease, often that with altered ventricular compliance.

summation gallop  one in which the third and fourth sounds are superimposed, appearing as one loud sound; usually associated with cardiac disease.

ventricular gallop  S

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S₃ gallop

Third heart sound Cardiology The heart sound that coincides with the onset of a low frequency diastolic wave generated by rapid filling; the SG is best heard at the apex of the left lateral decubitus position; the SG indicates ↓ ventricular compliance, and is characteristic of CHF; 'physiologic' SGs occur in children and young adults. See Congestive heart failure.