fourth heart sound

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fourth heart sound

The heart sound occurring in late diastole, corresponding with atrial contraction.

fourth heart sound

Atrial gallop Cardiology A heart sound which occurs late in the presystolic filling phase of the cardiac cycle and is caused by forceful atrial ejection; the 4^th HS is best heard over the apex with the Pt in supine or left semilateral position. Cf Third heart sound.

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atrial gallop
gallop
heart sound

heart sounds
physiologic fourth heart sound
presystolic gallop

S 4
S3 gallop
S4

second heart sound
sound
summation gallop

third heart sound
ventricular gallop

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