S3

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S3

Symbol for third heart sound.

S3

the third heart sound in the cardiac cycle. Normally, it is audible only in children and physically active young adults and usually disappears with age. In older people, it is an abnormal finding and usually indicates myocardial failure. It is heard with the bell of a stethoscope placed lightly over the apex of the heart with the patient lying down and facing left. A weak, low-pitched, dull sound, it is thought to be caused by vibrations of the ventricle walls when they are suddenly distended by blood from the atria. Also called physiological third heart sound, ventricular gallop.

S3

Third heart sound, a soft prolonged sound, which corresponds to vibrations in the wall of the ventricle caused by rapid filling of same; the S3 is normal in young athletes, but is usually abnormal.

S3

Abbreviation for third heart sound.
References in periodicals archive ?
lt;p>For four years or so, David Albrecht, a computer engineer from Illinois who is working on a master's degree, has used MozyHome to back up about 50GB of data on his MacBook Air laptop, and Amazon's S3 cloud storage service to back up a Linux home server.
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id=1-2IH2LGI&ct=150626&st=sb) a recent report by the information technology research firm Gartner, AWS' flagship S3 cloud storage service is 1.