In the bizarre video, you can even hear a galloping sound THIS is the chilling moment a “headless horseman” appears to gallop through a street in the dead of night – and is caught on spooky CCTV ...
The S3 heart sound occurs as the mitral valve opens and allows blood to fill the left ventricle passively. The sound happens as a result of blood striking the left ventricle during early diastole. An ...
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