A third heart sound, S3 usually indicates an increase in ventricular blood volume.
2.
A third heart sound is commonly heard.
3.
A third heart sound may also be present, also heard with inspiration at the lower sternal border.
4.
With continued increases in ventricular pressure, dilatation of the ventricle will occur, and a third heart sound may be manifest.
5.
In the Laplace's law . ) The S3, or third heart sound can be heard due to this increase in volume which can be pathognomic for heart failure.
6.
Other typical signs of pulmonary hypertension include an accentuated pulmonary component of the second heart sound, a right ventricular third heart sound, and parasternal heave indicating a hypertrophied right atrium.
7.
The reason the third heart sound does not occur until the middle third of diastole is probably that during the early part of diastole, the ventricles are not filled sufficiently to create enough tension for reverberation.
8.
Among the results from this work is that the so-called third heart sound, " S3 ", formerly taught to be pathological, is actually produced by all hearts, but is merely below the threshold of hearing of most physicians.
9.
The third heart sound is benign in youth, some trained athletes, and sometimes in pregnancy but if it re-emerges later in life it may signal cardiac problems, such as a failing left ventricle as in dilated congestive heart failure ( CHF ).
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