Heart sounds are the noises generated by the heart's activity, primarily caused by the opening and closing of heart valves. There are four heart sounds, labeled S1 to S4, but we'll focus on S1.
If you are feeling your pulse at your wrist (radial pulse) or neck (carotid pulse), the beat you feel is almost perfectly synchronized with S1 . This is because S1 is the sound of the heart preparing to eject the blood that creates the pulse wave. Why Timing Matters is s1 systole or diastole
The S1 heart sound is an essential component of the cardiac physical examination. Changes in the S1 sound can indicate various cardiac conditions, such as: Heart sounds are the noises generated by the