heart sounds

Heart sounds are vibrations generated by the heart's activities. The first sound (Lub) occurs when the ventricles contract, closing the atrioventricular valves. The second sound (Dub) happens when the ventricles relax, closing the semilunar valves. These sounds mark the phases of blood being pushed out and filling the heart. Occasionally, additional sounds or murmurs may be heard, indicating abnormal blood flow or valve issues. Overall, these sounds provide valuable information about heart health and function, helping to detect problems like valve disorders or structural abnormalities.