Medicolozy - There are two normal heart sounds that occur in sequence with each heart beat. These are the first heart sound (S1) and second heart sound (S2), produced by the closing
![Phonocardiograms from normal and abnormal heart sounds. Adapted from... | Download Scientific Diagram Phonocardiograms from normal and abnormal heart sounds. Adapted from... | Download Scientific Diagram](https://www.researchgate.net/profile/Ricardo-Cruz-Correia/publication/309327433/figure/fig1/AS:546171858808832@1507228926746/Phonocardiograms-from-normal-and-abnormal-heart-sounds-Adapted-from-netterimagescom.png)
Phonocardiograms from normal and abnormal heart sounds. Adapted from... | Download Scientific Diagram
![Auscultation area: listening positions for S1, S2, S3, and S4 heart... | Download Scientific Diagram Auscultation area: listening positions for S1, S2, S3, and S4 heart... | Download Scientific Diagram](https://www.researchgate.net/profile/Preecha-Yupapin-3/publication/228089380/figure/fig1/AS:214062962089984@1428047995610/Auscultation-area-listening-positions-for-S1-S2-S3-and-S4-heart-sounds-A-QRS_Q640.jpg)