| Webster's Online Dictionary |
| Expressions | Definition | ||
| Heart sounds | The heart sounds are the noises (sound) generated by the beating heart and the resultant flow of blood through it. In cardiac auscultation, an examiner uses a stethoscope to listen for these sounds, which include heart tones, or sounds, produced by heart valves closing, heart murmurs, and adventitious sounds, or clicks. (references) | ||
Source: compiled by the editor from various references; see credits. | Top | ||
| Expressions | Domain | Definition | |
| Heart Sounds | Health | The sounds heard over the cardiac region produced by the functioning of the heart. There are four distinct sounds: the first occurs at the beginning of systole and is heard as a "lubb" sound; the second is produced by the closing of the aortic and pulmonary valves and is heard as a "dupp" sound; the third is produced by vibrations of the ventricular walls when suddenly distended by the rush of blood from the atria; and the fourth is produced by atrial contraction and ventricular filling but is rarely audible in the normal heart. The physiological concept of heart sounds is differentiated from the pathological heart murmurs. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
