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heart sound

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heart sound
n.
Any of the sounds heard on auscultation over the heart, usually referred to as first, second, third, or fourth heart sound. Also called cardiac sound.

heart sound,
a noise produced within the heart during the cardiac cycle that can be heard over the precordium. It may reveal abnormalities in cardiac structure or function. Cardiac auscultation is performed systematically from the apex to the base of the heart or from base to apex, using a stethoscope to listen, initially with the diaphragm and then with the bell of the instrument. Standard heart sounds include S1>, produced by the closure of the atrioventricular valves; S2>, produced by the closure of the semilunar valves; S3; and S4>. Additional heart sounds include clicks, gallops, murmurs, rubs, and snaps.

heart sound
Cardiology Any normal or abnormal sound heard by auscultation of the heart. See Fourth heart sound, Murmur, Third heart sound.


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The volume of an electronic stethoscope can also be adjusted to a moderate level for children because they have loud heart sounds.
Therefore, doctors can use this stethoscope to listen to faint heart sounds of an obese patient as well as strong heart sounds of a child with excellent clarity.
 
 
 
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